Pediatric radiography discussion Case Study Example | Topics and Well Written Essays - 750 words

Pediatric radiography discussion - Case Study Example age receptor is then placed on the holder mount and the device is able to rotate the image in the posterior and the anterior positions without actually moving the child. The digital version has the image recorded in the flat panel detector, hence it does not require a cassette holder. When stockinettes are used, they are to be made in a tubular manner. The device comes in various sizes, where the 3 inch one is recommended for the small infants, whereas the 4 inch one is recommended for larger children. The device should be doubled and placed on the patient’s arms to cover the arms up to the shoulders. A part from being used to immobilize the arms, it is also used to act as a pillow. There are several types of gentle tapes that are used for surgical and immobilization procedures and sensitive skins. Adhesive tapes should not be used as it may show on the radiograph and create artifact that could obscure the anatomic parts of interest. Some patients also have a reaction to the adhesive tape. Adhesive tapes can also injure the fragile skin of the infants. Therefore, the tape should be twisted so that the adhesive surface is not against the skin. Gauze pads can also be placed between the skin and adhesive tape so that the ape is used effectively. Most of the sandbags are used as weights or immobilization devices for bigger children. These bags should be made specifically for immobilization of pediatric patients so as to be effective for this purpose. A strong canvas type material and children’s coarse sterilized playing sand should be used. The coarse sand is usually recommended so that, in case the bag can break open, the sand becomes more easily cleaned up, hence the chances of causing artifacts on the radiograph s are minimized. Two sandbags are recommended, but the sandbags should not be overfilled with sand since this will make the bag stiff. The bag needs to be pliable enough to mold to the part when placed on the child’s limb. During pediatric

Exercise assignments Coursework Example | Topics and Well Written Essays - 500 words - 4

Exercise assignments - Coursework Example It asserts that if possible then an action should be morally sufficient if it maximizes one’s self interests. Ethical egoism might also apply to things other than acts, such as rules or character traits. Psychological egoism has to components, strong and weak component. The strong part of egoism alludes that human beings ever act in their own self-interest. That is to say that they are forced to do so by their own psychology. On other side the weak form part of it argues that human beings always and occasionally act in their own self-interest. None of the two forms of Psychological egoism can stand its own to define what egoism is. For example if the strong form would be accepted, then it means that people should not be told on the right thing to do since they are controlled by their instinct. On the other hand if the weak form of it is to be used, that would mean that people should continue behaving the way they are behaving which cannot be proved. Psychological egoism fails to refute morality or to provide a foundation for ethical egoism because everyone always does what they do and it cannot be justifiable by information about their human conduct. Psychological egoism in its stro ng form alone would destroy all morality and is lacking both in evidence and in logic. â€Å"Individual ethical egoism†, states that people should always act for my â€Å"own† best self-interest while â€Å"Personal ethical egoism†, states that I should behave in â€Å"my own† self-interest, but be mindless about what everyone does. The problem with these forms is that it acts towards one individual and cannot be applied for all humanity in general. Universal ethical egoism is the most commonly held form of ethical egoism because it considers all humanity. It does not only talk about what an individual should consider doing but also is concerned with what all human beings should do for morality principles. However the

Single Sex School Essay Example for Free

Single Sex School Essay Segregated schools shoot up very rapidly around the world, furthermore, many sociologists and educationalists support that it is more beneficial for girls to study in a girls-only secondary school than in co-educational school. Actuallyï ¼Å'the disadvantages overweigh the advantages of choosing such schools. This essay will argue three disadvantages brought by single-sex school: poor socialization skills, skewed perception of gender roles and incorrect learning styles. To begin withï ¼Å'it is difficult for those who enter adult society after years of segregation to build meaningful friendships and even successful romantic relationships with opposite sex, according to the research published by Dr. Lynn Liben in 2011. Teenagers spend their formative years in the classroom developing skills that will help them maintain relationships throughout their lives. In addition, one of the chief aims of education is equip future citizens with all they require to take their places in adult society which is made up of male and female, it is clear that choosing single gender education is not a wise choice to access this purpose. Second, attending an all-girls school can teach female students a skewed perception of gender roles. On purpose, girls might avoid certain activities because those subjects are stereotypically too masculinized. Girls at a single-sex institution may ridicule each other for participating in activities like football or basketball. Female students can miss out on discovering new interests and talents by avoiding certain subjects altogether. Some Advocates of single-sex schools state that teachers can gear lessons toward a specific genders learning style. However, there is not enough research to prove that the learning styles of boys and girls differ enough to validate single-sex education. Also, not every boy and girl adheres to gender role stereotypes. Some girls are aggressive, and some boys are sensitive and shy. According to an article by Great Schools, gender-based learning styles prove ineffective and may even impair learning for students who dont fit the mold. In conclusion, girls in single sex schools might face disadvantages like poor socialization skills, skewed perception of gender roles and incorrect learning styles, so parents should be careful when they make decision of education style for their children.

Permanent Vascular Access For Hemodialysis Health And Social Care Essay

Permanent Vascular Access For Hemodialysis Health And Social Care Essay Introduction: A progressive rise in the number of patients accepted for renal replacement therapy has been reported world wide . Permanent vascular access (VA) is the life-line for the majority of these patients, when hemodialysis is the treatment of choice. Thus, the successful creation of permanent vascular access and the appropriate management to decrease the complications is mandatory. A well functional access is also vital in order to deliver adequate hemodialysis therapy in end stage renal disease (ESRD) patients. Unfortunately, despite the advances in hemodialysis technology, in the field of vascular access in the last years the introduction of the polytetrafluoroethylene (PTFE) graft and the cuffed double lumen silicone catheter were the only changes. But the cost of vascular access related care was found to be more than fivefold higher for patients with arteriovenous graft (AVG) compared with patients with a functioning arteriovenous fistula (AVF) . It seems that the native arteriovenous fistula that Brescia and Cimino described in 1966 still remains the first choice VA . Thereafter, vascular access still remains the Achilles heel of the procedure and hemodialysis vascular access dysfunction is one of the most important causes of morbidity in this population . It has been estimated that vascular access dysfunction is responsible for 20% of all hospitalizations and the annual cost of placing and looking after dialysis vascular access in the United States exceeds 1 billion dollars per year . Nowadays, three types of permanent vascular access are used: arteriovenous fistula (AVF), arteriovenous grafts (AVG) and cuffed central venous catheters. They all have to be able to provide enough blood flow in order to deliver adequate hemodialysis, have a long use-life and low rate of complications. The native forearm arteriovenous fistulas (AVF) have the longest survival and require the fewest interventions. For this reason the forearm AV, is the first choice, fol lowing by the upper-arm AVF, the arteriovenous graft (AVG) and the cuffed central venous catheter as a final step . History of vascular access Vascular access for hemodialysis is closely associated with the history of dialysis. Glass needles were employed as vascular access when hemodialysis came into view in 1924. The first haemodialysis treatment in humans was carried out by Haas G who used glass cannulae to acquire blood from the radial artery and reverting it to the cubital vein . Venipuncture needles were used as means for blood acquisition from the femoral artery and its reinfusion to patient by vein puncture, in 1943 by Kolff W. . Regular hemodialysis treatments were possible in 1950s through the use of a medical apparatus ( Kolff s twin-coil kidney ), thus projecting the problem of a reliable, capable of repeated use vascular access. Today, the artery-side-to-vein-end-anastomosis has become a standard procedure . In 1952, Aubaniac had described the puncture of the subclavian vein . In the 60s, by using Alwalls experience, Quinton, Dillard and Scribner developed arteriovenous Teflon shunt . This procedure involved two thin-walled Teflon cannulas with tapered ends were inserted near the wrist in the forearm, one into the radial artery and the other into the adjacent cephalic vein. The external ends were connected by a curved Teflon bypass tube. Later, the Teflon tube was replaced by flexible silicon rubber tubing. After the advancement of permanent vascular access, the possibility of maintenance hemodialysis was a fact and therefore a groundbreaking procedure. In the subsequent years many variants of the AV shunt were used, with the majority of them concerning temporary vascular access from the onset of chronic dialysis treatment compensating for the time of AV fistulas absence or maturity. In 1961, Shaldon performed hemodialysis procedures by inserting catheters into femoral artery and vein, using the Seldinger-technique . Over time, vessels in different sites were used, including the subclavian vein jugular and femoral. In 1962 Cimino and Brescia described a simple venipuncture for hemodialysis . In 1963 Thomas J. Fogarty invented an intravascular catheter with an inflatable balloon at its distal tip designed for embolectomy and thrombectomy . The first surgically created fistula was placed in 1965, followed by further 14 operations in 1966. In 1966 Brescia, Cimino, Appel and Hurwich published their paper about arteriovenous fistula. Appell had performed a side-to-side-anastomosis between the radial artery and the cephalic antebrachial vein. One year later, in 1967, M. Sperling reported the successful creation of an end-to-end-anastomosis between the radial artery and the cephalic antebrachial vein in the forearm of 15 patients using a stapler . In the next few years this type of AV anastomosis received popular approval. However this procedure was cast aside as first choice AV, due to the increasing numbers of elderly, hypertensive and diabetic patients with demanding vessels and high risk of a stea l syndrome. End-to-end-anastomoses are still a common place technique in revision procedures. In 1968 Rà ¶hl L. published thirty radial-artery-side-to-vein-end anastomoses . After anastomosis was performed, the radial artery was ligated distal to the anastomosis, thus resulting in a functional end-to end-anastomosis. Today, the artery-side-to-vein-end-anastomosis has become a standard procedure . In 1970, Girardet R. and Brittinger W.D. described their experience with the femoral vein and artery for chronic hemodialysis. Experimental trials have been done by several authors in order to establish a permanent vascular access using subcutaneous tunnel. Brittinger W. was the first to implant a plastic valve as a vascular access in an animal model but unfortunately his efforts did not proceed to a human one . Moreover during the early 70s, Buselmeier T.J. developed a U-shaped silastic prosthetic AV shunt with either one or two Teflon plugged outlets which communicated to the outside of the body. The U-shaped portion could be totally or partially implanted subcutaneously . Subsequ ently pediatric hemodialysis patients were extremely favored by this procedure. New materials for AV grafts were presented in 1972, one biologic and two synthetic.. In 1976, L.D. Baker Jr. presented the first results with expanded PTFE grafts in 72 haemodialysis patients . In the years to come several publications indicated the benefits and the shortcomings of the prosthetic material in question remaining the primary choice of graft for hemodialysis VA to date. The same year two authors, Mindich B. and Dardik H. had worked with a new graft material: the human umbilical cord vein. . Regrettably so, this material did not succeed in becoming a revolutionary graft material due to its inadequate resistance against the trauma of repeated cannulation and their complication (aneurysm and infection). After the subclavian route for haemodialysis access was firstly introduced by Shaldon in 1961, it was further processed in 1969 by Josef Erben, using the intraclavicular route . In the next 20 y ears or so, the subclavian vein was the preferred access for temporary vascular access by central venous catheterization. Today, due to phlebographic studies revealing a 50% stenosis or occlusion rate at the cannulation site, subclavian route has been discarded. The subclavian stenosis and occlusion predispose to oedema of the arm, especially after creation of an AV fistula . The first angioplasty described by Dotter et al who introduced a type of balloon, was immensely conducive to the resolution of one of the most significant predicaments in vascular surgery and vascular access surgery . In 1977 Gracz K.C. et al created the proximal forearm fistula for maintenance hemodialysis, a variant of an AV anastomosis . An adjustment of this AVF became quite significant in the old, hypertensive and diabetic patients on the grounds that it allows s a proximal anastomosis with a low risk of hypercirculation . In 1979 Golding A.L. et al developed a carbon transcutaneous hemodialysis access device (CATD), commonly known as button, as a blood access not requiring needle puncture . As a procedure of third choice, these devices were expensive and never gained widespread acceptance. Shapiro F.L. described another type of A.L. button, a device similar to that developed by Golding . Angioaccess classification Years after the initial efforts to create the appropriate vascular access in order to perform a safe hemodialysis, modern Nephrologists have now the possibility to select the appropriate access for their patients. So the first distinction is made between temporary and permanent VA . Temporary VA with expected half-life less than 90 days, peripheral arteriovenous shunts and non cuffed double lumen catheters are included . Mid-term VA with expected half life in 3 months to 3 years include veno-venous accesses (tunneled cuffed catheters and port catheter devices) and arteriovenous internal shunts, requiring vascular graft synthetic (PTFE) or biologic (saphenous vein, Procol, etc.) material ,or external shunt. Long-term VA with an expected half-life more than 3 years includes virtually the native arteriovenous fistulas and the new generation of PTFE grafts . Acute hemodialysis vascular access They are used for urgent hemodialysis and should be easy to insert and available for immediate use. Currently there are available two types of such accesses: Non-tunneled dialysis catheters and cuffed, tunnelled dialysis catheters. Double-lumen, non-cuffed, non-tunnelled hemodialysis catheters are the preferred method for immediate hemodialysis when a long term access is not available. They are made of polymers which are rigid at room temperature to facilitate insertion but soften at body temperature to minimize vessel injury and blood vessel laceration. The proximal and distal lumens should be separated by at least 2 cm to minimize recirculation . These catheters can be inserted into the central veins: femoral, jugular, or subclavian veins . The femoral artery can be used as an access central vein when all others central veins have been excluded. A modified Seldinger guide wire technique is used for their insertion. Image guided assistance in placing these catheters is recommended to avoid or minimize some of the immediate insertion complications, but non-cuffed catheters are also suitable for use at the bedside of the patient The 2006 National Kidney Foundation Dialysis Outcomes Quality Initiative (K/DOQI) guidelines recommend, after internal jugular or subclavian vein insertion, identifying radiographically any potential complications and confirming tip placement prior to either anticoagulation or catheter use . These guidelines also recommend ultrasound vessel identification prior to insertion. In general, now the subclavian catheters should be avoided because of the high incidence of vein stenosis and thrombosis. The maximum blood flow with this class of catheters is usually blood pump speeds of 300 mL/min, with an actual blood flow of 250 mL/min or less . Femoral catheters have to be at least 18 to 25 cm in length in order to have lower recirculation. The routine use-life of these catheters varies by site of insertion. In general, internal jugular catheters are suitable for two to three weeks of use, while femoral catheters are usually used for a single treatment (ambulatory patients) or for three to seven days in bed bound patients . However, the KDOQI guidelines suggest that non-cuffed, non-tunnelled catheters be used for less than one week and that cuffed, tunnelled catheters be placed for those who require dialysis for longer than one week . More recently a non-cuffed, non-tunnelled triple-lumen dialysis catheter has been developed. The purpose for third lumen is for blood drawing and the intravenous administration of drugs and fluid. In a multicenter, prospective study, blood flow rates and infectious complications were similar with double lumen catheter . Infectious complications are the principal reason why the catheter must be removed. Permanent Vascular Access Taking into consideration patient factors such as life expectancy, comorbidities, and status of the venous and arterial vascular system is very important in order to prescribe the appropriate access. Other factors are determined by the type of access itself, as arteriovenous fistula (AVF), arteriovenous graft (AVG), or TC which have a different effect on circulatory system. Also the duration of their functionality and the risk for infection and thrombosis are important factors to consider. Each type of surgical anastomosis has advantages and disadvantages . In 2002 the American Association for Vascular Surgery and the Society for Vascular Surgery published reporting standards according to which three essential components of VA should be mentioned: conduit (autogenous, prosthetic), location and configuration (strait, looped, direct, etc.) . Arteriovenous fistula An AVF is the preferred type of vascular access; it has the lowest complication rates for thrombosis (~ one-sixth of AVGs) and infection (~ one-tenth of AVGs) . There are 3 types of AVF s: à ¢Ã¢â€š ¬Ã‚ ¢ First type when artery and vein are connected in their natural position, either with a side-to-side or a side-artery-to-vein-end anastomosis. à ¢Ã¢â€š ¬Ã‚ ¢ Second type, where a vein is moved to connect to an artery in end-to-side fashion to either bridge a larger anatomical distance, or to bring the vein to the surface where it is accessible for cannulation and requires a tunnel to position the vein in its new location. à ¢Ã¢â€š ¬Ã‚ ¢ Third type where a vein is removed from its anatomical location and, is connected to an artery and vein in end-to-end fashion. Both second and third type requires the formation of a tunnel . End-to-end anastomoses are now rarely performed, since the complete disruption of the artery imposes a risk for peripheral ischemia and thrombosis. The most common surgical technique today is the side-to-end anastomosis. However technical problems as cutting the end of the vein in an oblique angle may create functional problems due to stenosis. An anastomosis more proximal in the arterial system should be smaller to prevent steal and limit maximal fistula flow, with the inherent complication of ischemic steal or heart failure . Arteriovenous fistula creation is often performed under local anaesthesia, with low morbidity and requires time for maturation. Data from the Dialysis Outcomes and Practice Patterns Study (DOPPS) indicate that AVFs should mature at least 14 days before use . Fistula size and flow increase over time, of 8-12 weeks and the initial blood flow rates has a range of 200-300 mL/min. Placement of AVFs should be initiated when the patient reaches CKD stage 4, or within 1 year of the anticipated start of dialysis. A physical examination should document blood pressure differences between the upper extremities and an Allen test should be performed, the lack of a well-developed palmar arch predicts a higher risk for vascular steal symptoms if the dominant artery is used for forearm fistulas creation due to inadequate collateral circulation . Ultrasound must be done before surgical implantation because it can provide information for maximal surgical success by mapping arteries and veins; eg, a preoperative arterial lumen diameter >2 mm is associated with successful fistula maturation, while a diameter of 600 mL/min, a diameter >0.6 cm with discernible margins, and be at a depth of 0.6 cm (between 0.5 and 1.0 cm) from the surface 6 weeks after creation. In fistulas that are maturing successfully, flow increases rapidly post-surgery, from baseline values of 30-50 mL/min to 200-800 mL/min within 1 week, generally reaching flows >480 mL/min at 8 weeks .The AVFs must be evaluated 4-6 weeks after placement, and experienced examiners (eg, dialysis nurses) can identify non-maturing fistulas with 80% accuracy . Arteriovenous graft AVGs were the most commonly used type of dialysis access in the US however, they do not last as long as AVFs and have higher rates of infection and thrombosis . Grafts present a second choice of VA when AVF are not able to be performed because of vascular problems. They can be placed in the forearm, the upper arm, and the thigh, and can have a straight, curved, or loop configuration. They may offer a large surface area for cannulation. AVGs can be cannulated about 2-3 weeks after placement, although there are studies suggesting that immediate assessment after placement for PTFE AVGs is possible . This interval is needed in order to allow the surrounding tissue to adhere to the PTFE conduit, to reduce the postsurgical oedema and the risk for local complications such as perigraft hematoma and seroma . Tunnelled hemodialysis catheter TCs are used when AVFs or AVGs arent possible to be created for several reasons such as multiple vascular surgeries, that lead to vascular thrombosis or when patients have severe peripheral vascular disease or very low cardiac output. Its more often in paediatric and very old patients. Unfortunately they are associated with the highest infection rate and they are not a very long-term access option. Studies have revealed that central venous catheters are colonized within 10 days of placement; however, colonization of the catheter biofilm does not correspond to positive blood cultures or clinical signs of bacteremia . Recently Power A. et al published their experience with 759 TCs. The survival rate at 1,2 and 5 years was 85%, 72% and 48% respectively. The infection rate was 0.34 per 1000 catheter day showing with careful and appropriate use of TCs, they can provide effective and adequate long term hemodialysis and rates of access related infection almost similar to AVGs . Hemodialysis vascular access in children The choice of replacement therapy in children is variable. The registry of the North American Pediatric Renal Trials and Collaborative Studies (NAPRTCS) reports that of patients initiating renal replacement therapy in paediatric centres : one quarter of children underwent preemptive renal transplantation, one half were started on peritoneal dialysis and one quarter were started on hemodialysis. Kidney transplantation remains the preferred therapy for paediatric patients therefore, many paediatric patients receive maintenance HD through an indwelling catheter in perspective of short HD period . In the United States less than 800 paediatric patients receive maintenance HD therapy, therefore surgical experience and clinical data for fistulae or grafts creation in small patients is limited due to rare need for such procedures. Smaller patients, especially those less than 10kg, are very demanding in surgical and nursing skill, this is significant reason the majority of smaller patients re ceive PD for their maintenance dialysis modality . Peritoneal dialysis is much more common in infants and younger children , significantly due to problems of vascular access. However, hemodialysis can be performed successfully in infants and very young children, as well . Children who will join in hemodialysis will need evaluation of their vasculature for placement of an arteriovenous (AV) fistula, arteriovenous graft, or cuffed double lumen catheter. The use of an AV fistula, the recommended type of vascular access in adults, is limited in children due to the size of their vessels. In the 2008 NAPRTCS annual report, vascular access for hemodialysis included external percutaneous catheter in 77.7 percent of patients, internal AV fistula in 12.3 percent, and internal and external AV shunt in 7.3 and 0.7 percent, respectively . K/DOQI has encouraged greater use of AV fistulas in larger children receiving hemodialysis who are not likely to receive a transplant within 12 months, with a goal of achieving more effective dialysis with fewer complications (eg, infection) than occurs with catheters. The choice of catheter size and configuration depends on the size of the patient. It is suggested by studies that in children as small as 4 to 5 kg a dual-lumen 8 Fr catheter can be well tolerated, and as the child becomes larger in size, a larger volume access can be placed . Vascular access should be able to provide sufficient blood flow and adequate dialysis with a Kt/V greater than 1.2. Kt/V is influenced further by the recirculation rate. Because flow rates in paediatrics vary by the size of catheter, which varies by the size of the patient, a recommended flow rate of 3 to 5 mL/kg/min is acceptable in most patients . Vascular access complications and Survival Studies have shown a mortality risk dependent on access type, with the highest risk associated with central venous dialysis catheters, followed by AVGs and then AVFs . The CHOICE study examined mortality based on access type in 616 hemodialysis patients for up to 3 years of follow-up. Central venous catheters and AVGs were associated with approximately 50% and 26% increased mortality, respectively, compared with AVFs with prevalence in men and elderly patients . Despite these findings and the KDOQI recommendations, dialysis access data from 2002-2003 showed that only 33% of prevalent hemodialysis patients in the US were being dialyzed via AVFs. Contrary in Europe and Canada, the majority of the patients (74% and 53% respectively) were being dialyzed via AVFs . Vascular access admissions continue to fall, with more procedures now performed in an outpatient setting, and are 45.1 percent below levels noted in 1993. By two-year time period, the adjusted relative risks of all- cause and cardiovascular hospitalization among hemodialysis patients vary little when compared to the reference period of 1997-1998; the risk of hospitalization for infection, however, is now 18 percent greater than in the reference period, while that of a vascular access hospitalization is 30 percent less. Among African American patients, the relative risk of an all-cause hospitalization or one related to infection is almost equal to that of white patients; the risk of a vascular access hospitalization, however, is 24 percent higher. In our previous work with 149 hemodialysis patients who had undergone 202 vascular access procedures (177 Cimino-Brescia fistulae and 25 PTFE grafts we found that the Cimino-Brescia fistula was used as the first choice of vascular access in all patients except one in the elderly group. PTFE grafts were the second or third choice in 7 patients younger than 65 and 15 in the elderly group (p: NS). The only reason for technique failure was vascular thrombosis in both groups (p: NS). Other complications were: aneurysms (10/48 and 14/101, p: NS), infections (0/48 and 2/101 p: NS) and oedema (0/48 and 6/101, p: NS). (Table à ¢Ã¢â€š ¬Ã‚ ¦.. Five-year technique survival of the first AV fistula in the two groups was 35% and 45% respectively (log-rank test, p: NS). (FIGUREà ¢Ã¢â€š ¬Ã‚ ¦..) Our findings suggested that there was no difference in vascular access complications across age groups and the survival of the first AV fistula is independent of age. Other encouraging results include a 22.9 percent fall in dialysis access admissions since 1999 for peritoneal dialysis patients, among hemodialysis patients, admissions for bacteremia/septicemia continue to rise sharply, reaching 112 per 1,000 patient years similar to the rate of 109 for vascular access infections, and possibly reflecting an increased use of cuffed catheters. In 2010 USRDS Annual Data Report hospitalization in 2008, increased again, to a point 45.8 percent above their 1993 level. In 2007-2008, women treated with hemodialysis were 16 percent more likely to be hospitalized, overall, than male. They also had a greater risk than men of cardiovascular, infectious, and vascular access hospitalizations 11, 14, and 29 percent greater, respectively. Recently unpublished our data are more different than those we published in 1998. We found in 189 patients that female had more possibility to start HD with double lumen catheter than male and also patients with heart failure ind ependent of sex. Female patients had PTEF grafts as first vascular access (p=0,023) and the elderly patients had more complications and more vascular access procedures (p=0.026). Non-tunnelled double lumen catheters complications The non-tunnelled double lumen catheters complications concern the insertion, the infection and thrombosis of the vessel. The severity and likelihood of insertion complications varies with the site of insertion. The complication rate and the severity are lowest in the femoral position. The primary problem is perforation of the femoral artery. Bleeding usually resolves within minutes of direct compression. Large femoral or retroperitoneal hematomas occur occasionally . Subclavian insertion complications are potentially more serious. Over-insertion of guide-wire can occasionally lead to atrial or ventricular arrhythmias. The vast majority of these are transient and hemodynamically insignificant . Penetration or cannulation of the subclavian artery can lead to hemothorax, which in some cases requires a thoracotomy tube. Cases of pericardial rupture and tamponade also have been described . Subclavian insertion from the left has an increased risk of atrial perforation which can present with acute hemopericardium upon initiation of dialysis. The incidence of pneumothorax varies from less than 1 percent to mor e than 10 percent of insertions, depending on the skill and experience of the physician. The risk of pneumothorax is greater from the left than right side, since the pleura and dome of the lung are higher on the left . Due to high rate of catheter-induced subclavian stenosis and subsequent loss of the ipsilateral arm for future hemodialysis access internal jugular vein insertion, particularly the right internal jugular vein is the preferred site of insertion. At internal jugular insertions carry a higher likelihood of carotid artery penetration, but a lower risk of pneumothorax (0.1 percent). Ultrasound guided cannulation of the vessel is recommended to minimize these complications. The location of the catheter tip in subclavian and internal jugular insertion should always be confirmed by fluoroscopy or x-ray prior to the initiation of hemodialysis or the administration of anticoagulants. Ultrasound-guided catheter insertion is lesser likelihood of arterial puncture or pneumothorax . Prevention and treatment of catheter thrombosis are important clinical issues. To prevent formation of thrombus, both lumens of the double lumen catheter are instilled with heparin following hemodialysis. The amount injected should only fill the catheter lumen to minimize systemic heparinization. Anecdotal evidence suggest that chronic anticoagulation with warfarin or low molecular weight heparin may also prevent catheter thrombus, due to either intraluminal clot or fibrin sheath formation . Lytic agents such as urokinase and alteplase are effective in treatment of catheter thrombosis. Alteplase has effectiveness rates in thrombosis treatment comparable to that observed with urokinase . However if non-cuffed catheters cannot have adequate blood flow then they should be exchanged. Ventral vein catheters are associated with the development of central vein stenosis . This complication appear s to occur more often with subclavian (40 to 50 percent of cases in some studies) than with internal jugular insertions (up to 10 percent) . It has been proposed that central venous cannulation creates a nidus of vascular injury and fibrosis. The rapid blood flows associated with the hemodialysis catheter then create turbulence that can accelerate endothelial proliferation, eventually leading to venous stenosis . The K/DOQI guidelines therefore recommend avoiding placement in the subclavian vein, unless no other options are available. If central venous thrombosis is detected early, it responds well to directly applied thrombolytic therapy or to percutaneous transluminal angioplasty when the fibrotic stenosis can be crossed with a guidewire . The infection risks associated with temporary double lumen catheters include local exit site infection and systemic bacteremia, both of which require prompt removal of the catheter and appropriate intravenous antibiotic therapy . Bacteremia gene rally results from either contamination of the catheter lumen or migration of bacteria from the skin through the entry site, down the hemodialysis catheter into the blood stream . Skin flora, Staphylococcus and Streptococcus species, are responsible for the majority of infections. There is conflicting evidence concerning the risk of infection based upon the site of insertion. In the largest prospective randomized study, the risk of infection was not reduced with jugular versus femoral venous catheterization . A prospective nonrandomized studies suggest that the infection risk appears to sequentially increase for hemodialysis catheters inserted into the subclavian, internal jugular, and femoral veins, respectively . Overall, compared with the subclavian vein, the internal jugular vein remains the preferred access site in ambulatory patients because of the high rate of central vein stenosis associated with subclavian vein catheterization (see above). In the Intensive Care Unit, either femoral or internal jugular vein placement is satisfactory, with the use of ultrasound making internal jugular vein placement safer. The best solution is to prevent the infection by proper placement technique, optimal exit site care and management of the catheter within the HD facility . Arteriovenous fistulas complications Complications of AVFs can be divided into early and late causes. Early causes include inflow problems such as small or atherosclerotic arteries, or juxta-anastomotic stenosis so a pre-operative evaluations for suitable access sites has to been performed . The aetiology of this acquired lesion is not entirely clear, but may be related to manipulating the free end of the vein, torsion, poor angulation, or loss of the vasa vasorum during anatomic dissection. This lesion often can be adequately treated with angioplasty or by surgical revision . Outflow problems may include accessory veins that divert blood flow from the intended superficial vessel to deeper conduits, or central venous stenosis in patients with prior central venous catheters. Vessels smaller than one-fourth of the fistula diameter are usually not hemodynamically relevant. Juxta-anastomotic stenosis and accessory veins are the most common causes for early failure AVFs when pre-operative evaluations for suitable access sites have been performed . Late causes for failure of AVFs include venous stenosis, thrombosis, and acquired arterial lesions such as aneurysms or stenosis. Venous stenosis may become apparent as flow decreases over time, worsening weekly Kt/V ([dialyzer clearance _ time]/body volume) or increasing recirculation. Native fistulas typically will not thrombose until flow is severely diminished. Static pressure measurements, which are helpful in graft monitoring, do not appear as helpful in AVFs, since collaterals surrounding the stenosis area often develop, effectively masking the rise in fistula outflow resistance. Stenotic lesions can be treated by angioplasty. Thrombectomy of fistulas, although technically more challenging than in AVGs, is often successful and if flow is re-established, primary patency is longer than in grafts . Aneurysms may form over the course of years as the fistula increases with increased flow and, unless associated with stenotic lesions, are more a cosmetic than functional concern. If the skin overlying the aneurysm is blanching or atrophic, or if there are signs of ulceration

A Patriarchal World Essay -- essays papers

A Patriarchal World John Bodnar says it well when he suggests that "the center of everyday life was to be found in the family-household. It was here that past values and present realities were reconciled, examined on an intelligible scale, evaluated and mediated." This assertion implies that the immigrant family-household is the vehicle of assimilation. I will take this assertion a step further and examine more specifically the powerful role of the patriarchal father within Anzia Yezierska's book Bread Givers and Barry Levinson's film Avalon. Yezierska's theme vividly depicts the constraint of a patriarchal world, while Levinson illustrates the process of assimilation and the immigrant, now American, family and its decline. In this paper, I will exemplify how the patriarchal father, Sam Kochinsky (Armin Mueller-Stahl) and Reb Smolinsky are the key determinant of the dynamics by which the family assimilates. In assimilation, you are said to conform to your surroundings. Assimilation is a process by which you reconcile the ideal with reality. Dealing with virtually three generations of an entire Jewish American immigrant experience, Levinson illustrates not necessarily the merging of two cultures, but possibly the tainting of authenticity, clouding (memories of) the familiar-the villain being the television. The happy community of extended family is, in the end, supplanted by the glowing idiot box that kills conversation and turns its suburban audience into zombies. In Yezierska's work, she epitomizes the struggle between the Old World and the New World. The patriarchal father, representing traditional Jewish ways, and Sara Smolinsky, the heroine, struggling against her father with the desire to reconcile with reality. In Bread Givers, Yezierska symbolically depicts Sara as the immigrant parting her ways as she embarks anew on the journey that was given to her when she arrived by which to transform her life-dealing with the daily transformation as she struggles to hold together the wants of society and her (families) authenticity in these days of deep troubles. The head of the family, Reb Smolinsky is an immovably Orthodox Jewish rabbi, who lives by the Holy Torah, and expects his family to do the same. His reign over the family reinforces Old World, traditional values and beliefs. Reb holds to the Torah belief that "if they [women] let... ...ggested an adaptation in the hopes that Jules would simply have a better life than that of a wallpaper-hanger. In putting television in place a New World, Levinson portrays how a cheap, gaudy, poor substitute somehow seduced and enraptured the family. Perhaps Levinson is saying that although it may be the easier to converge, assimilation is too costly. On the other hand, you have Reb whose stubborn beliefs and male superiority coupled with a passive wife allow him to claim control over his daughter's lives. Resentment is quite damaging and separates families as well. Either way you look at it the outlook is favorable for neither assimilation nor isolation. And so I conclude in saying that the patriarchal father has an especially important role and while he needs the strength found in Yezierska's character, Reb, (in order to hold the family together) he must also be willing to adapt to a changing reality. Immigration is neither a call for assimilation nor isolation. Indivi duality is important, but why resist change when you can better yourself in the process. Bibliography: Levinson, Barry. Avalon. 1990. Yesierska, Anzia. Bread Givers. Persea Books: New York, 1999.

Pride and Prejudice Essay: First Impressions -- Pride Prejudice Essays

First Impressions in Pride and Prejudice      Ã‚  Ã‚   First impressions are very important in Jane Austin's Pride and Prejudice. As the story develops, we discover how the prejudices and first impressions of each of the main characters change. The primary focus is on the character of Elizabeth Bennet.    Elizabeth's judgments about other characters' dispositions are accurate about half of the time.   While she is correct about Mr. Collins and how absurdly self-serving he is and about Lady Catherine de Bourgh and how proud and snobbish she is, her first impressions of Wickham and Darcy steer her incorrectly.   Wickham is first thought to be a gentleman by all.   His good looks and his easy manner fool almost everyone, and Elizabeth believes without question all that he tells her of Darcy. Elizabeth's first impressions of him are contradicted when she realizes that he has lied about Darcy.    Elizabeth and many of the other characters se... ... her married daughters with pride, and Elizabeth is said to be proud of Darcy because of what he had done for Lydia.   First impressions can be discussed of many of the other characters than those discussed here, and prejudice is illustrated not only in Elizabeth's behavior, but in Darcy's and Lady Catherine's reactions to the status of Elizabeth's family as well    Work Cited: Austen, Jane. Pride and Prejudice. 1813. Ed. Donald Gray. New York: Norton and Co., 1993.

Global Education Essay

According to the historical analysis in the 1990s, the global education movement in the United States took on a number of ethnocentric individuality. Largely since of attacks from the political Right, global instructor worked hard to avoid issues that were contentious. In adding up, they frequently strove for what was euphemistically called â€Å"equilibrium. † That is, â€Å"teach concerning other peoples plus condition, but do it ‘patriotically. ‘† It also turn into clear at this time that, as lots of American educators advocated counting the study of global issues in the curriculum, mainly did not particularly think to seek interface by means of educators from around the world who also were concerned through the teaching of global issues. For these reasons, I set out to find out what was being done about the world to comprise global education in the set of courses. I drafted a opinion poll, had it translated into French and Spanish, in addition to sent it to people in 100 countries who were well-informed about global education. Responses were established from 52 countries. No doubt these data have been reported in other researches. In the residue of this research, I will present highlights from this study along by means of updates on what is happening in the state most concerned in the global education group. Definition of Global Education The definition of global education specified to respondents was the one from the 1991 ASCD (Association for Supervision and Curriculum Development) annual, Global Education: From consideration to Action: Global education involves learning concerning those troubles and issues which cut crossways national boundaries and regarding the interconnectedness of systems — educational, environmental, financial, political, and technical. If we analyze then we come to know that global education also involves learning to appreciate and be grateful for our neighbors who have diverse cultural backgrounds from ours; to see the earth through the eyes as well as minds of others; and to realize that extra peoples of the world require and want much the similar things. Local School Vs Global Education Place of work diversity has taken a new face today; workplace diversity focuses on the impact of council’s base line. Not only can it monetarily benefit a council, but also by embracing diversity an organization can augment their ideas, insights, and a variety of pools of talent. Leveraging workplace variety is more and more seen as an essential strategic resource for competitive advantage. More companies are connecting workplace multiplicity to their strategic objective and objects. Greenwich Manufacturing has realized that diversity has an enormous impact and in addressing these issues; the council is implementing a Public Relations (PR) campaign to position itself as a leader in encouraging and promoting diversity in its workplace. This paper will outline Greenwich Borough PR campaign including its defined target audience, an overview of public relations issues, and implications of ethical issues. In addition, Greenwich has implemented a marketing research plan and sought to bring into line its marketing and public relation strategies In several cases, deforestation can be helpful. Given the right mix of social needs, financial opportunities, and environmental circumstances, it can be a rational change from one type of land use to a more prolific one. It can lead to thoroughfare of communication being created. Minerals that bring a state much wanted capital can be used to generate a better life for the peoples of that nation. In the long term these behavior may be fuelling Brazil’s advance into a major deal power. These are far reaching and all surrounding effects. The disaster lies in the fact that mainly lands that have been deforested in current decades are not suited for lasting farming or ranching and they rapidly degrade once the forest has been cut and burnt. Different the fertile soils of temperate latitudes, most tropical forest soils cannot sustain annual cropping. The carrying ability of the soil will not support concentrated annual cropping devoid of rapid, irreversible squalor. Likewise, intensive cattle grazing cannot be supported since grasses grown on forest soils do not have the same productivity levels as those on arable soils. In fact, there are very few forested soils in rising countries today that are obtainable for future agricultural growth, underscoring the urgent need to increase agricultural manufacture on existing farmlands rather than converting additional forests to farms. In global, local, human and economic terms, the tropical forests destroyed each year represent a loss in forest capital valued at US $45 billion (Hansen, 1997). The Hansen report is independent and so a source that can be trusted. By destroying the forests so quickly now and creating a hardwood ‘drought’, all potential future revenues and future employment that could be derived from their sustainable management for timber and non-timber products disappear. Probably the mainly grave and most short-sighted consequence of deforestation is the defeat of biodiversity. It is a result with consequence on every level. The sterile phrase â€Å"loss of biodiversity† (Anne Baker, 2003, p. 1) masks the fact that the yearly obliteration of millions of hectares of tropical forests means the death of thousands of species as well as varieties of plants and animals, numerous of which have never been catalogued methodically. How lots of species are lost every year? The exact research is not recognized, a consequence of our incomplete knowledge of steamy forest ecosystems and our insufficient monitoring systems. Some approximation put the annual loss at 50,000 divide species but this is a cultured guess at best. This gene pool obliteration could be destroying curers to some of today’s most lethal diseases, such as cancer, as we have so little information of the rainforest, but 35% of our medication comes from it. Ethical Considerations It makes good trade sense to be sight as an ethical council, and it benefits the workplace to have an additional optimistic work environment. There are a variety of definitions of ethics. One source states ethics has to do by means of what my feelings tell me is right or wrong or being ethical is doing what the law states. One more ethics theory variety from utilitarianism, states the definition as â€Å"most good for the most number† (Seitel, 2004). In addition to ethics, a corporation has a social blame that is closely related to the ethical conduct. It is a council’s social liability and ethical blame to employee diversity in keep hold of a promoting minorities and women. Employee safety and health is an additional responsibility to give a safe and healthy labor environment have polices in place, accident safeguards and medical facilities (Center, A. H. , Jackson, P. 2002). There is no real safeguard for companies or individuals to be ethical, however there are standards and polices for corporation to put in place, such as an annual code of ethics meeting or acknowledgement to instill the importance of ethics in the workplace (Kitchen, PJ 1997).