Evaluation of a screening protocol to exclude the diagnosis of deep venous thrombosis among emergency department patients.

OBJECTIVE: The purpose of this study was to evaluate the efficacy and cost effectiveness of a deep venous thrombosis (DVT) screening protocol incorporating DVT pretest probability (PTP), selective D-dimer assay, and venous duplex imaging (VDI) to exclude the diagnosis of DVT among emergency department (ED) patients. METHODS: A prospective study of all patients evaluated in the ED for suspected DVT during 1 year was undertaken. Patients were classified into PTP risk category by ED physicians before VDI. Correlation studies were completed using VDI as the gold standard. Charges associated with the protocol were calculated. RESULTS: One hundred fourteen patients were included. The incidence of DVT was 9.6% (11). Thirty-six (55%) patients were classified as high risk, 23 (35%) as moderate, and 7 (10%) as low risk. All patients diagnosed with DVT were in the high-risk group (incidence, 16.7%). The sensitivity and negative predictive value were both 100% when PTP and D-dimer were used, but fell to 80% and 95%, respectively, when only D-dimer was considered. The true negative rates were 23% and 37%, respectively. Based on this study, we propose the following screening: for high-risk patients, use direct VDI (no D-dimer); for low-risk or moderate-risk patients, obtain D-dimer, and if it is positive, use VDI, and if it is negative, no further action is required. The average charge associated with the protocol was 170.50 dollars as opposed to 202.00 dollars for global VDI. CONCLUSION: A screening protocol using PTP along with selective D-dimer and VDI to exclude the diagnosis of DVT among ED patients is efficacious and cost efficient. This screening approach establishes criteria to satisfy billing requirements, can eliminate unnecessary VDI in 23% of ED referrals, and can reduce charges by 16%.

Balloon angioplasty for arteriovenous graft stenosis.

PURPOSE: To retrospectively review the long-term outcome as well as the cost effectiveness of thrombolytic therapy and balloon angioplasty (TBA) versus surgical thrombectomy and balloon angioplasty (SBA) in the treatment of prosthetic dialysis access grafts. METHODS: Between February 1996 and February 1999, 63 hemodialysis patients (35 women; mean age 62.2 years) were treated for 105 thromboses in 6-mm polytetrafluoroethylene straight or loop bridge arteriovenous grafts. Choice of treatment was at the discretion of the surgeon or interventional radiologist: either Fogarty balloon thrombectomy followed by balloon dilation of the venous anastomotic stenosis or urokinase thrombolysis followed by angioplasty. RESULTS: Forty-eight SBAs and 55 TBAs were performed in 63 patients without complications. The primary patency rates in the entire cohort were 34%, 29%, and 17% at 1, 2, and 3 months, respectively. Primary patency after TBA was 29%, 18%, and 11%, and that for SBA, 45%, 45%, and 33% over the same time intervals. The mean graft survival was 10 days for TBA versus 31 days for SBA. Repeat angioplasty performed in 23 grafts produced secondary patency rates of 52% at 1 month, 34% at 3 months, and 5% at 5 months. The Medicare reimbursement for both treatments was identical ($1638 for TBA and $1670 for SBA). CONCLUSIONS: The poor patency rate and high cost of TBA and SBA suggests that these procedures should not be routinely used for salvage of thrombosed arteriovenous grafts with outflow stenosis. Patch angioplasty or creation of simultaneous temporary and new permanent accesses may be a more cost-effective approach in these patients.

Impact of curricular change in an undergraduate program for speech pathologists on perceived preparedness for the workplace.

Recently, educational policymakers have emphasized the need for undergraduate programs to develop in their graduates generic skills and attributes beyond discipline-specific skills and knowledge. The generic skills and attributes should mesh with the requirements of the workplaces where the graduates will find employment. The present study examined the impact of curricular revisions to a program of study for speech pathologists on the perceptions of the graduates regarding their preparation in appropriate skill and knowledge domains. The curricular revisions sought to develop independent learning, critical thinking, research and evaluation skills, written and oral communication skills, and skills for seeking and providing support to peers. Seventy-eight graduates of the earlier program and 21 graduates of the revised program offered by the School of Communication Disorders at The University of Sydney completed a 52-item questionnaire concerning the extent to which the program had equipped them for the workplace. Eleven scales were derived from the questionnaire responses, reflecting skills endorsed by university educators and workplace supervisors of allied health professionals as being necessary for success in the workplace. The relative levels of perceived preparation on the 11 dimensions were similar across graduates of the revised program and those of the earlier program. Graduates of the revised program were significantly more positive about their preparation on five of the 11 dimensions, compared with earlier graduates of approximately equivalent age and experience. The dimensions where differences were observed generally reflected those targeted by the curricular revisions.

Health science graduates: preparation for the workplace.

The research reported in this article was undertaken to assess the perceptions of health science graduates in the fields of health information management, occupational therapy, orthoptics, physiotherapy, and speech pathology regarding their perceptions of the adequacy of undergraduate preparation in meeting the demands of a changing health care environment. An instrument was devised for use by graduates on the basis of the skills and workplace behaviours specified by experienced practitioners in the above fields as necessary in newly recruited graduates. A total of 527 health science graduates completed the 52 item instrument. The statistical analyses indicated that 11 factors define the adequacy of graduates' preparation for the workplace. Health science graduates perceived themselves to have been more thoroughly prepared on certain workplace dimensions than on others. Specifically, graduates perceived themselves to be ill-equipped on dimensions concerned with workplace management, knowledge of the health industry, and coping in the workplace. Graduates also perceived themselves to be inadequately prepared in terms of communicating with clients, health professionals, and the general public. The strengths of their courses were perceived to be in completing essential tasks, having confidence in the clinical role, in ethical practice, in pursuit and application of knowledge, and having a realistic expectation of the workplace role. The results are discussed in terms of the need to address curriculum changes.

Ruptured abdominal aortic aneurysms: factors affecting mortality rates.

Outcome of 113 operations for ruptured abdominal aortic aneurysms were reviewed to determine the contribution of perioperative events to mortality rates. Preoperative, intraoperative, and postoperative factors were examined with regard to their influence on early and late deaths. A mortality rate of 64% (72/113) was unrelated to age, gender, and preexistent medical conditions. Death within 48 hours occurred in 42 of 72 patients (58%). Preoperative status, including cardiac arrest, loss of consciousness, and acidosis influenced early deaths (less than 48 hours) but not late deaths. Early deaths were also influenced by severe operative hypotension and excessive transfusion requirements. Late deaths (greater than 48 hours) occurred in 30/72 cases (42%) at a mean of 24.6 +/- 22.9 days. Late death was related to postoperative organ system failure, specifically renal and respiratory failure, and the need for reoperation. The overall mortality rate was influenced by preoperative, intraoperative, and postoperative factors. Postoperative renal failure was the strongest predictor of overall deaths. Survival after ruptured abdominal aortic aneurysm depends on intraoperative and postoperative complications as well as preoperative conditions. Late death, the greatest strain on resources, is independent of preoperative status. The thesis that some patients with ruptured abdominal aortic aneurysm should be denied operation to conserve resources is not supported by these data. Efforts to improve survival should focus on reducing intraoperative complications and improving management of postoperative organ failure.