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Smith DG, Wheeler JR, Clement JP. Fundraising, government grants and donations to nonprofit hospital charities. Health Serv Manage Res 1995; 8:198-208. [PMID: 10151091 DOI: 10.1177/095148489500800305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Using 1982-1987 tax return data from California hospital charities, this paper investigates the relationship between fundraising expenditures, government grants and donations, during a time in which significant changes were being made in the system of hospital reimbursement. Empirical results suggest that while donations have been declining, charities have been efficient in their solicitation of donations. Results also suggest that government grants worked to reduce charitable contributions in the period before the institution of Medicare's Prospective Payment System. In more recent years, government grants have been associated with increases in donations to hospital charities.
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DeMasi RJ, Gregory RT, Snyder SO, Gayle RG, Parent FN, Wheeler JR. Coexistent abdominal aortic aneurysm and renal carcinoma: management options. Am Surg 1994; 60:961-6. [PMID: 7992975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Renal carcinoma (RCA) presenting in association with abdominal aortic aneurysm (AAA) is extremely rare, with only sporadic case reports previously described. The management of six cases of AAA and concomitant RCA presenting to a single institution from March, 1991 through December, 1993 was reviewed and management options considered. AAAs ranged in size from 4.5-7.0 cm (mean, 5.6 cm). Three left renal carcinomas were resected via a retroperitoneal approach simultaneous to repair of the AAA. One right renal carcinoma was resected in combination with repair of an AAA through a transperitoneal approach. The fifth case was managed by left nephrectomy, followed by interval aneurysmectomy, and the sixth case was managed by nonsurgical methods because of the presence of widely metastatic disease. Renal malignancies included five renal cell carcinomas and one transitional cell carcinoma. Three patients remain free of disease 8-11 months postoperatively, and one patient had metastatic disease detected 19 months postoperatively. Two deaths have occurred; one due to a massive CVA 1 month following a combined aneurysmectomy and left nephrectomy, and a second due to unknown etiology in the patient managed non-surgically. No peripheral vascular or aortic graft related complications have occurred. The treatment of AAA and RCA should be governed by the size of the AAA, the location of the cancer, and the extent of malignant disease. Simultaneous resection is safe and effective in patients with coexistent AAA and renal cancer. Left sided tumors should be resected via a retroperitoneal approach that also provides excellent exposure for simultaneous AAA resection.(ABSTRACT TRUNCATED AT 250 WORDS)
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103
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Demasi RJ, Snyder SO, Wheeler JR, Gregory RT, Gayle RG, Parent FN, Gandhi RH. Intraoperative iliac artery stents: combination with infra-inguinal revascularization procedures. Am Surg 1994; 60:854-9. [PMID: 7978681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Iliac artery percutaneous transluminal angioplasty (PTA) can effectively provide in-flow for subsequent distal vascular reconstruction. Iliac artery stents may improve the initial hemodynamics and long term patency of PTA, and thus may be well-suited for combined proximal PTA with distal bypass procedures. This report reviews our preliminary experience with iliac artery stenting in combination with infra-inguinal vascular reconstruction. Thirteen iliac artery stent procedures combined with simultaneous distal revascularization were performed in 11 patients. Ten procedures were performed for limb salvage, two for disabling claudication, and one before planned orthopedic surgery. Distal revascularization procedures included seven femoropopliteal, four femorotibial bypasses, one common femoral endarterectomy, and one thrombectomy of a femoropopliteal bypass. Stent placement was technically successful in all patients. Mean pre-operative ankle-brachial index (ABI) was 0.41 (+/- 0.28), which improved to 0.91 (+/- 0.18) post-operatively (P < 0.0001). Mean systolic iliac artery gradients across the lesions improved from 27.1 (+/- 9.8) mm Hg to 2.7 (+/- 3.4) mm Hg after stent placement (P < 0.0001). Mean follow-up is 5.8 months (range 1-12 months). Two femoropopliteal bypass grafts occluded in the follow-up period. One occlusion was caused by a mid-vein graft stenosis that was repaired with subsequent graft patency. The other graft occlusion occurred in a patient with rest pain who did not require a second bypass procedure, as the ABI increased from 0.3 to 0.7 following stent placement with resolution of symptoms.(ABSTRACT TRUNCATED AT 250 WORDS)
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Gandhi RH, Katz D, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent FN. Vein harvest ischemia: a peripheral vascular complication of coronary artery bypass grafting. CARDIOVASCULAR SURGERY (LONDON, ENGLAND) 1994; 2:478-83. [PMID: 7953453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Lower-extremity ischemia can lead to impaired healing of saphenous vein excision sites in patients with significant peripheral vascular disease (PVD). Five patients who required infrainguinal revascularization for wound necrosis of the harvest site after coronary artery bypass grafting are described. The male/female ratio was 2:3 with a mean age of 67 (range 45-87) years. The most commonly associated problems were insulin-dependent diabetes mellitus (80%) and congestive heart failure (60%). The saphenous vein was harvested from the thigh and leg in three patients and exclusively from the leg in the others. Manifestations of ischemia ranged from persistent ulceration to complete wound disruption threatening limb loss. Impaired healing was isolated to infragenicular wounds in all patients. Pedal pulses were not detected in any of the affected extremities. Determination of the ankle/brachial pressure indices (ABI) revealed values of < 0.5 in three affected limbs. Non-compressible vessels resulted in falsely raised ABI of > 1.0 in the remaining two limbs; however, Doppler waveform analysis in these patients demonstrated significant PVD. Aggressive wound care and antibiotic therapy were continued for mean of 9 weeks before operative intervention. Infrainguinal reconstruction included femoropopliteal (two), femorotibial (two) and popliteal-tibial bypass (one). Autologous arm and saphenous veins in addition to expanded polytetrafluoroethylene grafts were used effectively. Limb salvage and wound healing were achieved in 100% of the patients without untoward sequelae. It is concluded that unrecognized PVD in patients undergoing coronary artery bypass grafting can lead to significant morbidity. Patients at risk may be identified with a combination of history, physical examination and non-invasive testing.(ABSTRACT TRUNCATED AT 250 WORDS)
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Mamo JC, Wheeler JR. Chylomicrons or their remnants penetrate rabbit thoracic aorta as efficiently as do smaller macromolecules, including low-density lipoprotein, high-density lipoprotein, and albumin. Coron Artery Dis 1994; 5:695-705. [PMID: 8000623 DOI: 10.1097/00019501-199408000-00008] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND The aortic accumulation of chylomicrons, low-density lipoprotein (LDL), high-density lipoprotein (HDL) and albumin were compared in normal New Zealand White rabbits. METHODS Lipoproteins and albumin were labelled with radioiodinated tyramine cellobiose (TC) to avoid potential oxidative modification of lipoproteins and as a marker of intracellular degradation. In preliminary experiments it was established that TC labelling did not alter the kinetic properties of lipoproteins in vivo. Importantly, radiolabelled apolipoproteins did not transfer significantly between plasma lipoproteins. Therefore, aortic radioactivity following infusion of TC-radiolabelled lipoproteins was considered to be indicative of lipoprotein accumulation. RESULTS In conscious rabbits, net aortic accumulation of chylomicrons or their remnants was similar to those of LDL, HDL and albumin up to 2 h after infusion, despite rapid clearance from plasma. When accumulation was calculated on the basis of mean arterial exposure to allow for the differences in plasma clearance, the accumulation of aortic chylomicrons/remnants was substantially greater than that of LDL, HDL or albumin. Qualitatively similar results were obtained in rabbits that were functionally eviscerated to slow clearance of chylomicron remnants. Chylomicrons/remnants did not appear to efflux from aortic tissue as rapidly as did LDL or other plasma lipoproteins. Autoradiographic analysis showed that the primary site of lipoprotein accumulation was within medial smooth muscle cells. CONCLUSION Our data demonstrate that chylomicrons/remnants accumulate in arterial blood vessels more rapidly than does LDL, suggesting that dietary lipoproteins may be directly involved in the pathogenesis of atherosclerosis.
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106
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Katz D, Snyder SO, Gandhi RH, Wheeler JR, Gregory RT, Gayle RG, Parent FN. Long-term follow-up for recurrent stenosis: a prospective randomized study of expanded polytetrafluoroethylene patch angioplasty versus primary closure after carotid endarterectomy. J Vasc Surg 1994; 19:198-203; discussion 204-5. [PMID: 8114181 DOI: 10.1016/s0741-5214(94)70095-8] [Citation(s) in RCA: 99] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
PURPOSE To determine the effect of primary closure (PC) versus expanded polytetrafluoroethylene patch graft angioplasty (PGA) on the incidence of recurrent stenosis (> 50% lumen diameter narrowing) after carotid endarterectomy (CEA), 87 patients undergoing 100 consecutive CEA were prospectively randomized into two groups. METHODS Forty-four patients underwent 51 PC, and 43 patients underwent 49 PGA. All patients were evaluated after operation by duplex scanning at 1.5, 12, 24, and 36 months. There were no significant differences in the demographic characteristics or operative indications for CEA between the two patient groups. Complete follow-up was achieved in 86% (75/87) of the patients during the 36-month surveillance period. RESULTS The perioperative permanent neurologic morbidity in the PC and PGA groups was noted to be 4% and 2%, respectively (PC = 2/51 vs PGA = 1/49, p = 0.58). Three additional reversible cerebral ischemic events occurred in the postoperative period (PC = 2/51 vs PGA = 1/49, p = 0.58). Other morbidity included immediate postoperative hemorrhage requiring reexploration (1/51) in the PC group and an infected expanded polytetrafluoroethylene patch requiring removal and replacement with autogenous vein (1/49). Long-term follow-up detected a single patient with significant bilateral restenoses of his primarily closed carotid arteries. None of the patients in the PGA group had restenoses (PC = 2/51 vs 0/49, p = 0.50). In addition, no postoperative dilation of the common or internal carotid arteries or perioperative death was observed. CONCLUSIONS In patients undergoing CEA, these data demonstrate no significant difference in the perioperative morbidity or mortality between PC and PGA. Use of the patch did not engender patients to patch rupture or aneurysmal degeneration as previously described with vein patch angioplasty procedures. This series supports effective use of either technique to achieve minimal rates of restenosis.
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Knedle-Murray ME, Oakley DJ, Wheeler JR, Petersen BA. Production process substitution in maternity care: issues of cost, quality, and outcomes by nurse-midwives and physician providers. MEDICAL CARE REVIEW 1994; 50:81-112. [PMID: 10125119 DOI: 10.1177/002570879305000106] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Parent FN, Gandhi RH, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Masuda EM. Angioscopic evaluation of valvular disruption during in situ saphenous vein bypass. Ann Vasc Surg 1994; 8:24-30. [PMID: 8192996 DOI: 10.1007/bf02133402] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Several valvulotomes are currently available to achieve valvular disruption; however, studies comparing the efficacy of these endoluminal instruments are lacking. This prospective study evaluates the efficacy and safety of the three most commonly employed valve cutters: the Hall, LeMaitre, and Mills valvulotomes. A total of 30 in situ greater saphenous vein bypass grafts were included in this investigation. Valvular disruption was attempted with either the LeMaitre (11 cases), Hall (12 cases), or Mills (7 cases) valvulotomes. Subsequently, angioscopy was employed to assess the completeness of valvulotomy and to identify vein wall injury. Incomplete disruption of one or more valve complexes was identified in 2 of 12 (17%) grafts in the Hall group, 10 of 11 (91%) grafts in the LeMaitre group, and 0 of 7 grafts in the Mills group (p < 0.01). Intact valve cusps were noted in 2 of 36 (5.5%) valves, 31 of 42 (74%) valves, and 0 of 38 valves after valvulotomy with the Hall, LeMaitre, and Mills instruments, respectively (p < 0.01). A total of three valvulotome-related injuries occurred; two injuries were noted in conjunction with the Hall instrument, one was associated with the Mills valvulotome, and no injuries were detected after use of the LeMaitre instrument (p = 0.33). These data demonstrated a significantly increased incidence of retained valve cusps when the LeMaitre valvulotome was used. No significant difference in the rate of vein wall injury was noted in the three groups. Thus this study suggests that the LeMaitre instrument is not as effective as either the Hall or Mills valvulotomes for achieving valvular disruption.
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109
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Feinberg RL, Sorrell K, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent FN. Successful management of traumatic false aneurysm of the extracranial vertebral artery by duplex-directed manual occlusion: a case report. J Vasc Surg 1993; 18:889-94. [PMID: 8230577 DOI: 10.1067/mva.1993.44845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A 32-year-old man was transferred to our hospital after a 2.0 by 2.5 cm traumatic false aneurysm of the distal extracranial vertebral artery was noted after a stab wound of the posterior side of the neck. To obviate the need for operative exposure of the distal vertebral artery at the base of the skull, we elected to perform duplex-directed manual occlusion of the lesion. Angiography before and after the procedure, as well as 10-month follow-up duplex ultrasonography, demonstrated satisfactory thrombosis of the false aneurysm without evidence of a residual arterial defect. There was no morbidity associated with the procedure. We conclude that duplex-directed manual occlusion, a new technique recently described for the nonoperative management of postcatheterization femoral false aneurysms, can be applied safely and effectively to false aneurysms in other locations in which the risks and technical difficulties of operative repair render surgery less desirable.
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110
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Gandhi RH, Wheeler JR, Gregory RT. Vascular Prosthetics: the Gore-Tex ePTFE Stretch Graft. Surg Technol Int 1993; 2:293-297. [PMID: 25951578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Following introduction of the Gore-Tex stretch vascular graft in 1991, over 15,000 bifurcated and 35,000 straight grafts have been distributed (Figure I). This novel graft, recommended for arterial and venous reconstruction, is touted to afford significantly superior handling characteristics, kink-resistance and conformability. In addition, the "stretch" feature is thought to confer ease of sizing and anastomotic accuracy. Whether this product of advanced polymer science represents a panacea in the field of vascular grafting or a mere addition to the host of less than ideal synthetic conduits remains to be discerned. The first human implantation of a stretch graft was conducted by one of the authors (R.T.G.) during aortic replacement at the Eastern Virginia Medical School (EVMS). A favorable experience has since been gained by utilization of the stretch graft during vascular reconstruction for aortoiliac, infrainguinal and visceral arterial disease. This review will present the intriguing history of synthetic graft development and recount our experience with the Gore-Tex stretch vascular graft.
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Sorrell KA, Feinberg RL, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent NF. Color-flow duplex-directed manual occlusion of femoral false aneurysms. J Vasc Surg 1993; 17:571-7. [PMID: 8445754 DOI: 10.1067/mva.1993.39244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
PURPOSE During the past 14 months we conducted a prospective clinical trial to evaluate the efficacy of duplex-directed manual occlusion (DDMO) of iatrogenic femoral false aneurysms (FFAs) as an alternative to standard operative management. METHODS In all cases DDMO was performed with real-time color-flow imaging while steady, continuous external pressure was applied manually to the neck of the FFA by an experienced vascular technologist for a period of 10 minutes. RESULTS Ten of the 11 FFAs treated with DDMO in this series were thrombosed successfully, requiring a mean of 30 minutes of compression per aneurysm (three compressions of 10 minutes each). DDMO was unsuccessful in one patient, whose session was terminated because of severe discomfort as a result of the procedure. All 10 patients with successfully thrombosed FFAs are without recurrence at 1-month follow-up color-flow duplex examination, and there has been no morbidity attributable to DDMO. CONCLUSIONS We conclude that DDMO of postcatheterization FFA can be performed safely and is an inexpensive, effective, nonoperative method of managing such lesions. The precise role of this technique would appear to be as a first-line treatment for uncomplicated iatrogenic FFAs.
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112
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Najmaldin AS, Wheeler JR, Griffiths DM. A posterior tunnel for the jugular venous catheter in newborns. J Pediatr Surg 1993; 28:164-5. [PMID: 8437071 DOI: 10.1016/s0022-3468(05)80265-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A modified technique of tunnelling for jugular venous catheters in the newborn is described. The technique eliminates cannula-kinking and offers a more convenient position for the catheter.
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113
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Feinberg RL, Gregory RT, Wheeler JR, Snyder SO, Gayle RG, Parent FN, Patterson RB. The ischemic window: a method for the objective quantitation of the training effect in exercise therapy for intermittent claudication. J Vasc Surg 1992; 16:244-50. [PMID: 1495149 DOI: 10.1067/mva.1992.36947] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Twenty-two patients with intermittent claudication were prospectively enrolled in a 12-week program of supervised, graded treadmill exercise therapy. Severity and distribution of arterial occlusive disease were ascertained by noninvasive determination of segmental lower extremity blood pressures and waveforms. No attempt was made to modify risk factors for atherosclerotic occlusive disease. The exercise-induced reduction of the ankle pressure and its recovery were recorded over time, and the area under this curve, the "ischemic window," represents the severity of the ischemic deficit. Absolute systolic ankle pressure, ankle-brachial index, maximum walking time, claudication pain time, and the ischemic window were measured before and after exercise training in all subjects. Maximum walking time and claudication pain time increased 659% and 846%, respectively, among the 19 patients completing the 12-week program (p = 0.001; p = 0.0002). These patients underwent a mean reduction of 58.7% in the ischemic window after a standardized workload (p less than 0.05), and this correlated with the degree of symptomatic improvement. Absolute ankle pressure and ankle-brachial index were unchanged after exercise training. This study confirms the utility of supervised exercise therapy in the treatment of intermittent claudication. The ischemic window is a useful method for quantifying the ischemic deficit produced by exercise and provides a reproducible means of documenting functional improvement in patients undergoing exercise training.
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Wheeler JR, Fadel H, D'Aunno TA. Ownership and performance of outpatient substance abuse treatment centers. Am J Public Health 1992; 82:711-8. [PMID: 1314520 PMCID: PMC1694132 DOI: 10.2105/ajph.82.5.711] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Little is known about the organization and performance of outpatient substance abuse treatment (OSAT) centers. We examine several performance measures of OSAT units, including clients treated, services provided, revenue sources, financial performance, and access to care, in relation to ownership of the center. METHODS Data were drawn from a national random sample of 575 OSAT centers (85.8% response rate) participating in a telephone survey conducted in 1988. Analysis of variance by ownership was conducted on each performance measure, with differences subjected to tests of statistical significance. RESULTS Descriptive results show that major funding sources differ by ownership. Private for-profit centers generate higher profits, charge higher prices, and achieve higher levels of financial performance than public and not-for-profit centers. Public centers provide better access to care for persons who are unable to pay. CONCLUSIONS There appear to be substantial and interrelated differences by ownership type in the financing and operation of OSAT units.
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115
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Cull DL, Winter RP, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent FN. Mycotic aneurysm of the suprarenal abdominal aorta. THE JOURNAL OF CARDIOVASCULAR SURGERY 1992; 33:181-4. [PMID: 1572874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We report on the successful treatment of a patient with a mycotic aneurysm of the suprarenal aorta. The aorta was resected and reconstructed using an in-situ polytetrafluoroethylene graft with a side arm branch to the left renal artery. The use of polytetrafluoroethylene graft for aortic reconstruction after suprarenal mycotic aneurysm resection has not been previously reported. The etiology, bacteriology, diagnosis, and principles of management of mycotic aneurysms of the suprarenal aorta are discussed.
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116
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Cull DL, Gregory RT, Wheeler JR, Snyder SO, Gayle RG, Parent FN. Duplex scanning for the intraoperative assessment of infrainguinal arterial reconstruction: a useful tool? Ann Vasc Surg 1992; 6:20-4. [PMID: 1547071 DOI: 10.1007/bf02000662] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Duplex scan, arteriography, and graft flow rates were used intraoperatively to assess 56 infrainguinal arterial reconstructions for technical error. Intraoperative duplex scan identified a technical defect or low graft flow velocity in 22 of 56 (39%) grafts. Eleven of the defects were judged to be clinically significant and were corrected. Four of these defects were missed by the completion arteriogram. One technical defect identified by completion arteriography was missed by duplex scan. Fifty percent (5/10) of grafts with an abnormal intraoperative duplex scan which were not corrected occluded within 30 days. Graft flow rates measured by the electromagnetic flowmeter were neither predictive of technical defect nor early graft outcome. Although the sensitivity of arteriography and duplex scan (88% sensitivity for both) were both high for predicting early graft occlusion, the combination of duplex scan and completion arteriography was significantly more accurate (p less than .0001) in predicting early graft outcome than either study alone. Duplex scan identified significant graft defects which were not detected by completion arteriography or graft flow rate measurement. The duplex scan also provided hemodynamic information which was predictive of early graft outcome. The duplex scan can be an important adjunct to completion arteriography for the intraoperative assessment of infrainguinal arterial reconstruction.
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Early TF, Gregory RT, Wheeler JR, Snyder SO, Gayle RG, Parent FN, Sorrell K. Spontaneous carotid dissection: duplex scanning in diagnosis and management. J Vasc Surg 1991; 14:391-7. [PMID: 1880848 DOI: 10.1067/mva.1991.30273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The clinical, duplex, and angiographic findings in six patients with seven spontaneous extracranial carotid artery dissections are reported. Four dissections resulted in internal carotid artery occlusion. These patients complained of ipsilateral headache followed by contralateral hemiplegia. The other three dissections involved the common carotid artery and resulted in dual (one true and one false) lumens. Two of these dissections were asymptomatic. All dissections were treated nonoperatively with anticoagulant therapy. Neurologic deficits improved or disappeared in all symptomatic patients. On follow-up studies, one of the four internal carotid occlusions completely resolved with normalization of the duplex examination. All three dual lumen dissections remained patent on serial studies. Diagnostic duplex characteristics, both conclusive and supportive, of carotid dissections are described. Duplex scanning is shown to be accurate in diagnosing and ideally suited for serially following spontaneous carotid dissections.
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Cull DL, Wheeler JR, Gregory RT, Synder SO, Gayle RG, Parent FN. The Vena Tech filter: evaluation of a new inferior vena cava interruption device. THE JOURNAL OF CARDIOVASCULAR SURGERY 1991; 32:691-6. [PMID: 1939334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Expanded indications for caval interruption and earlier diagnosis of deep venous thrombosis have resulted in increased use of transvenous caval interruption devices and have intensified the search for the ideal caval filter. The Vena Tech vena cava filter is a percutaneous, transvenous caval interruption device which was recently introduced in the United States. We reviewed our experience with this filter. During the period of September 1989 to July 1990, 41 patients underwent placement of the Vena Tech filter. Indications for filter insertion included deep venous thrombosis with a contraindication to anticogulation (61%), pulmonary embolism while on anticoagulant therapy (29%), and prophylaxis (10%). Insertion was accomplished percutaneously in 40 patients (98%) and via cutdown in one patient. Thirty-nine (95%) were placed from the right internal jugular vein and two (5%) from the right femoral vein. There were no deaths related to filter placement. Incomplete opening of the filter occurred in 8 patients (19%); however, the incidence of deployment problems decreased as our experience increased. Pulmonary embolism after filter placement occurred in one patient (2%). Duplex scan was obtained postoperatively in 15 patients (mean follow-up 120 days). The inferior vena cava was patent in all patients, although nonoccluding thrombus was identified in the filter in one patient. We conclude the Vena Tech filter is an effective device for caval interruption, is easily inserted, and is associated with minimal morbidity.
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Cull DL, Feinberg RL, Wheeler JR, Snyder SO, Gregory RT, Gayle RG, Parent FN. Experience with laser-assisted balloon angioplasty and a rotary angioplasty instrument: lessons learned. J Vasc Surg 1991; 14:332-9. [PMID: 1831862 DOI: 10.1067/mva.1991.30867] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Favorable early results with mechanical angioplasty devices and laser-assisted balloon angioplasty have resulted in aggressive marketing and a rapid increase in the use of these devices for the treatment of femoropopliteal occlusive disease. Recent reports, however, have questioned the durability of these less invasive procedures. Since 1986 we have been involved in the clinical investigation of the Kensey dynamic angioplasty instrument and laser-assisted balloon angioplasty. One hundred two balloon angioplasty procedures assisted by the Nd:YAG laser (n = 56) and the Kensey dynamic angioplasty instrument (n = 46) were performed for the treatment of femoropopliteal occlusive lesions. Both Kensey dynamic angioplasty instrument and laser-assisted balloon angioplasty groups were similar with regard to age, operative indication, preoperative ankle-brachial index, lesion length, and distal runoff. Mean follow-up was 19 months in the Kensey dynamic angioplasty instrument group and 15 months in the laser-assisted balloon angioplasty group. Technically successful recanalization was achieved in 67% of Kensey dynamic angioplasty instrument-assisted balloon angioplasty procedures and 82% of laser-assisted balloon angioplasty procedures. Early hemodynamic and clinical improvement was obtained in 59% of Kensey dynamic angioplasty instrument-assisted balloon angioplasty procedures and 57% of laser-assisted balloon angioplasty procedures. Two-year clinical success by life-table analysis was 37% in the Kensey dynamic angioplasty instrument group and 19% in the laser-assisted balloon angioplasty group. The level of subsequent surgical revascularization was not altered in any patient by Kensey dynamic angioplasty instrument-assisted balloon angioplasty or laser-assisted balloon angioplasty.(ABSTRACT TRUNCATED AT 250 WORDS)
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Angioplasty, Balloon/adverse effects
- Angioplasty, Balloon/instrumentation
- Angioplasty, Balloon/methods
- Angioplasty, Balloon/statistics & numerical data
- Angioplasty, Laser/adverse effects
- Angioplasty, Laser/instrumentation
- Angioplasty, Laser/methods
- Angioplasty, Laser/statistics & numerical data
- Ankle/blood supply
- Arm/blood supply
- Arterial Occlusive Diseases/surgery
- Arterial Occlusive Diseases/therapy
- Blood Pressure/physiology
- Constriction, Pathologic/surgery
- Constriction, Pathologic/therapy
- Equipment Design
- Female
- Femoral Artery/pathology
- Follow-Up Studies
- Humans
- Life Tables
- Male
- Middle Aged
- Popliteal Artery/pathology
- Risk Factors
- Virginia/epidemiology
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Cull DL, Parent FN, Wheeler JR, Gregory RT, Snyder SO, Gayle RG. Thoracic aortic ectasia in a patient with Takayasu's disease. Ann Vasc Surg 1991; 5:470-2. [PMID: 1683560 DOI: 10.1007/bf02133055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Arterial aneurysm formation occurs in 15 to 20% of patients with Takayasu's disease. The timing of surgical intervention of these aneurysms is controversial. A case of ectasia of the descending thoracic aorta in a patient with Takayasu's disease is presented. The diagnosis and timing of surgical intervention of aneurysms associated with Takayasu's disease are discussed.
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Wickizer TM, Wheeler JR, Feldstein PJ. Have hospital inpatient cost containment programs contributed to the growth in outpatient expenditures? Analysis of the substitution effect associated with hospital utilization review. Med Care 1991; 29:442-51. [PMID: 1902277 DOI: 10.1097/00005650-199105000-00005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The rapid increase in outpatient expenditures has been the focus of growing attention in recent years. This increase has corresponded with public and private efforts to contain hospital inpatient costs, prompting some analysts to suggest that outpatient expenditure growth is the result of a substitution effect; that is, the substitution of outpatient for inpatient care associated with hospital cost containment programs. Claims data on 43 privately insured groups that adopted utilization review (UR) during the latter part of 1984 or early 1985 were analyzed, comparing outpatient expenditures before and after adoption of hospital inpatient UR to quantify the substitution effect associated with UR. UR was not associated with higher physician office expenditures nor with higher outpatient diagnostic expenditures. UR was related to significantly higher hospital outpatient department expenditures. On average, these expenditures were approximately 20% higher (P = 0.01) after the adoption of UR. However, outpatient department expenditures of the groups analyzed represented a fairly small percentage of total medical expenditures; hence, the absolute expenditure increase was quite modest, on the order of $9 per insured person per year. This analysis, admittedly limited in scope, suggests that UR is associated with a measurable substitution effect. It is likely that inpatient hospital cost containment programs have resulted in some substitution of outpatient for inpatient care and thus have played a role in fostering outpatient expenditure growth during recent years.
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Wheeler JR, Clement JP. Capital expenditure decisions and the role of the not-for-profit hospital: an application of a social goods model. MEDICAL CARE REVIEW 1990; 47:467-86. [PMID: 10113013 DOI: 10.1177/107755879004700404] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Feinberg RL, Winter RP, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent FN, Adcock GD. The use of composite grafts in femorocrural bypasses performed for limb salvage: a review of 108 consecutive cases and comparison with 57 in situ saphenous vein bypasses. J Vasc Surg 1990; 12:257-63. [PMID: 2398584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We retrospectively reviewed the results of 108 consecutive femorocrural bypasses performed with prosthetic/autogenous composite graft material and compared these with the results of 57 crural bypasses using greater saphenous vein by the in situ technique. Indication for operation in all cases was the salvage of an otherwise imminently threatened limb. Polytetrafluoroethylene-composite grafts (n = 87) and human umbilical vein-composite grafts (n = 21) were placed only in patients lacking suitable autogenous material for in-line reconstruction. Patient groups were similar with respect to mean age, prevalence of arterial disease risk factors, quality of the distal runoff, and location of the distal anastomosis. Cumulative patency rates at 1 year by life-table analysis were 81.9%, 34.6%, and 12.1% for the in situ, polytetrafluoroethylene-composite and human umbilical vein-composite groups, respectively. At 2 years these were 63.9%, 29.9%, and 6.0%, respectively (p less than 0.025). Cumulative limb salvage at 1 year was 70.6%, 62.3%, and 32.7%, respectively. Wound-related complications occurred in 52.4% of human umbilical vein-composite, 38.6% of in situ, and 18.3% of polytetrafluoroethylene-composite bypasses (p less than 0.05). On the basis of these results, we conclude that femorocrural bypass with polytetrafluoroethylene-composite graft is an acceptable form of distal reconstruction for limb salvage in patients lacking sufficient lengths of autogenous vein. We no longer use human umbilical vein for composite construction.
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Feinberg RL, Wheeler JR, Gregory RT, Snyder SO, Gayle RG, Parent FN. Initial results and subsequent outcome of laser thermal-assisted balloon angioplasty of 56 consecutive femoropopliteal lesions. Am J Surg 1990; 160:166-9; discussion 169-70. [PMID: 2143359 DOI: 10.1016/s0002-9610(05)80299-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Laser thermal-assisted balloon angioplasty (LABA) was prospectively applied in the treatment of 56 atherosclerotic femoropopliteal occlusive lesions in 51 consecutive patients. All procedures were performed in the operating room using a neodynium:yttrium-aluminum-garnet (Nd:YAG) laser source, and patients were evaluated for immediate and long-term hemodynamic and clinical improvement. Technically successful recanalization was achieved in 82% of cases, with 57% of all patients (32 of 56) obtaining early hemodynamic and clinical improvement. Long-term clinical success (by life-table analysis) was obtained by only 22.5% at 6 months, and only 13.5% at 12 months. Patients presenting with intermittent claudication did significantly better than those presenting for limb salvage (p = 0.01), and trends toward improved outcome were noted for short versus long lesions as well as for patients with "good" versus "poor" distal runoff (NS). Procedure-related morbidity occurred in 14%, and there was one peri-procedural mortality (1.8%). We conclude that the use of LABA is associated with long-term clinical success in only a small proportion of patients, and that widespread clinical application of this technique is not indicated at the present time.
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Wickizer TM, Feldstein PJ, Wheeler JR, McDonald MC. Reducing hospital use and expenditures through utilization review. Findings from an outcome evaluation. QUALITY ASSURANCE AND UTILIZATION REVIEW : OFFICIAL JOURNAL OF THE AMERICAN COLLEGE OF UTILIZATION REVIEW PHYSICIANS 1990; 5:80-5. [PMID: 2136669 DOI: 10.1177/0885713x9000500303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Utilization review (UR) has become a prominent approach to cost containment now used by almost 65% of private group insurance plans. Although insurers have increasingly relied on UR to contain health care costs, until recently little was known about the effects of this cost containment approach. This article reviews some of the key findings of a UR evaluation, based on analysis of claims data on 223 insured groups for the years 1984 through 1986. The evaluation found that UR reduced admissions by 12%, inpatient expenditures by 8%, and total expenditures by 6%. It was estimated that UR generated net savings of $115 per employee per year. Groups adopting UR with high baseline rates of hospital use had larger expenditure reductions and greater net savings. It appears that UR can play an important role in private cost containment and help improve medical care resource consumption.
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