Epidemiology of major lower limb amputation using routinely collected electronic health data in the UK: a systematic review protocol.

INTRODUCTION: It is estimated that peripheral arterial disease occurs in one in five people aged over 60 years in the UK. Major lower limb amputation is a debilitating and life-changing potential outcome of peripheral arterial disease. A number of risk factors are involved in the development of the disease including smoking and diabetes. There is debate over the prevalence of major lower limb amputation in the UK with regional variations unexplained. The choice of data source can affect the epidemiological calculations and sources can also differ in the ability to explain variation. This study will aim to estimate the prevalence/incidence/number of major lower limb amputation in the UK. It will also identify sources of routinely collected electronic health data which report the epidemiology of major lower limb amputation in the UK. METHODS AND ANALYSIS: A systematic search of peer-reviewed journals will be conducted in Medline, Excerpta Medica database, Cumulative Index of Nursing and Allied Health Literature, Allied and Complementary Medicine Database, The Cochrane Library and Scopus. A grey literature search for government and parliament publications, conference abstracts, theses and unpublished articles will be performed. Articles will be screened against the inclusion/exclusion criteria and data extracted using a pretested extraction form by two independent reviewers. Prevalence, incidence or number of cases (depending on data reported) will be extracted. Disagreements will be resolved by discussion. Data synthesis will be performed either as a narrative summary or by meta-analysis. Heterogeneity will be assessed using the I2 statistic. If heterogeneity is low-moderate, pooled estimates will be calculated using random-effects models. If possible, meta-regression for time trends in the incidence of major lower limb amputation will be performed along with subgroup analysis, primarily in regional variation. ETHICS AND DISSEMINATION: Ethics approval is not required for this study as study data are anonymised and available in the public domain. Dissemination will be by publication in a peer reviewed journal and by appropriate conference presentation.PROSPERO registration numberCRD42020165592.

Influence of Perioperative Serum Magnesium for Cardiac and Noncardiac Morbidity and Mortality Following Emergency Peripheral Vascular Surgery.

OBJECTIVES: To examine the influence of serum magnesium on 30-day mortality and cardiac and noncardiac morbidity. DESIGN: Retrospective cross-sectional observational study of routinely collected prospective data. SETTING: Single-center tertiary vascular center in the United Kingdom. PARTICIPANTS: All patients undergoing arterial peripheral vascular surgery during an unplanned admission. INTERVENTIONS: Observational, no interventions implemented. MEASUREMENTS AND MAIN RESULTS: In the study, n = 197. One hundred thirty-eight were male (70.1%). Median age at procedure was 70.0 years (interquartile range 20.0). Of those with a documented history, 37.9% had diabetes, 81.7% had a smoking history, 63.7% had hypertension, and 26.5% had known ischemic heart disease or heart failure. There was a significant perioperative change in magnesium (p < 0.001), calcium (p < 0.001), and creatinine (p = 0.004), with no significant alteration in potassium (p = 0.096). Thirty-day mortality was 4.6%. Thirty-day cardiac morbidity was 4.1%. Thirty-day noncardiac morbidity was 32.3%. Postoperative magnesium was independently predictive for 30-day mortality (p = 0.02, odds ratio [OR] 0.96, 95% confidence interval [CI] 0.94-0.99) and cardiac morbidity (p = 0.03, OR 0.97, 95% CI 0.95-1.00). Only a previous smoking history was independently predictive of noncardiac morbidity (p = 0.03, OR 9.67, 95% CI 1.20-78.15). CONCLUSION: Perioperative changes in serum magnesium may have an influence on short-term mortality and cardiac complications. This should be considered in the management of patients undergoing unplanned peripheral vascular surgery; however, further research is needed to examine the benefit of supplementation perioperatively and to explore the exact mechanisms.

By pass arterial femorodistal bajo anestesia local / Distal femoral bypass under local anaesthesia

Introducción: El objetivo de este trabajo es transmitir nuestra experiencia en by pass arterial femorodistal bajo anestesia local para pacientes de alto riesgo. Material y métodos De enero a mayo de 2010 hasta 8 pacientes han sido intervenidos en nuestro centro de cirugía de revascularización en miembros inferiores bajo anestesia local. Las características comunes de los pacientes eran la edad avanzada, cardiopatía isquémica crónica en tratamiento con antiagregantes plaquetarios y la enfermedad pulmonar obstructiva crónica (EPOC).Resultados Los 8 pacientes (100%) toleraron de forma adecuada el procedimiento sin recurrir a sedación ni a procedimientos anestésicos invasivos. La arteria receptora fue la tibial posterior en 6 de ellos (75%) y la poplítea y peronea en uno (12%). En 7 casos logramos permeabilidad precoz del injerto y uno presentó trombosis precoz con amputación supracondílea; la técnica empleada fue femoropoplíteo en un caso, femorotibial posterior en 6 casos y poplíteo-peroneo en otro. El injerto utilizado fue la vena safena mayor, invertida en un paciente (12%) e in situ en 7 (88%) con valvulotomo BARD™, 3mm. Las complicaciones postoperatorias fueron del 0% para hemorragia, infección y muerte; en 3 pacientes (37%) amputación menor y, tras un periodo de seguimiento medio de 3 meses (1-4 meses), 7 casos están libres de amputación mayor. Conclusiones La revascularización del territorio distal de los miembros inferiores puede llevarse a cabo mediante anestesia local de forma segura y eficaz, sin necesidad de retirar antiagregantes ni asumir los riesgos de la anestesia general. La anatomía desfavorable (obesidad) puede limitar el procedimiento (AU)

Introduction: The aim of this article is to present our experience in performing distal femoralby pass under local anaesthesia for high risk patients. Material and methods: Lower limb revascularisation surgery under local anaesthesia was performed on 8 patients in our centre between January and May 2010. The common characteristics of the patients were, advanced age, chronic is chaemic heart disease on antiplatelet treatment, and chronic obstructive pulmonary disease (COPD). Results: All 8 patients (100%) tolerated the procedure well without having to resort to sedation or invasive an aesthetic procedures. The receiving artery was the posterior tibialin 6 cases (75%) and the popliteal and peroneal in 1 (12%). Early patency of the graft was achieved 7 patients and 1 had early thrombosis with a supracondylar amputation. The technique used was femoral-popliteal in 1 case, femoral-posterior tibial in 6 cases, and popliteal-peroneal in 1 case. The saphenous vein was the graft used, inverted in 1 patient(12%), and in situ in 7 (88%) with a 3 mm BARDTM valvotomy. There were no post-operative complications as regards haemorrhage, infections or death. A minor amputation was performed on 3 patients (37%), and after a mean of 3 months (1-4 months) follow-up,7 cases were free of major amputation. Conclusions: Revascularisation of the distal zone of the lower limbs can be safely and effectively performed using local anaesthesia, avoiding the risks of general anaesthesia and without the need to stop antiplatelet treatment. Anatomical problems (obesity) may limit the procedure (AU)

[Surgical management of sub-retinal haemorrhage secondary to polypoidal choroidal vasculopathy]. / Prise en charge chirurgicale des hémorragies sous-rétiniennes secondaires à une vasculopathie polypoïdale.

We report the case of a 34-year-old black woman with acute and severe unilateral loss of sight related to idiopathic polypoidal choroidal vasculopathy responsible for a sub macular haemorrhage (1/10 on the Monoyer scale). The patient underwent a pars plana vitrectomy associated with a sub retinal administration of tissue plasminogen activator (100 µg) and a pneumatic displacement by gas (C2F6) with facedown positioning for 5 days. There were no intraoperative complications and the clot was lysed and totally displaced from the macula. There was no recurrence of the disease and the retinal epithelium detachment decreased progressively. The final visual acuity was 7/10. This case report illustrates the capacity and efficacy of this surgical procedure in the management of sub macular haemorrhage related to polypoidal choroidal vasculopathy. It provides effective displacement of the clot, limiting retinal damage induced by sub macular haemorrhage. Furthermore, it allows early treatment of the polypoidal aneurysm by laser or dynamic phototherapy and increases final visual acuity. Randomised studies are expected to determine the indication for this surgical procedure in the management of polypoidal choroidal vasculopathy and the possible association of laser, dynamic phototherapy, or anti-VEGF treatments.

Comparison of vacuum-assisted closure device and conservative treatment for fasciotomy wound healing in ischaemia-reperfusion syndrome: preliminary results.

Ischaemia-reperfusion syndrome (IRS) is a condition that may require early fasciotomy. In the past, fasciotomies ultimately required prolonged hospitalisation. Vacuum-assisted closure (VAC) therapy system is an innovative method which promotes wound healing by reducing wound oedema, increasing microcirculation, and stimulation of granulation tissue. The aim of this retrospective study was to compare the VAC treatment with the conservative treatment of the fasciotomy wound until definitive surgical closure. The researchers retrospectively identified 15 patients, 3 females and 12 males, with a mean age of 69 years, who underwent a fasciotomy between January 2003 and December 2009 at the University Hospital of Geneva. All of the fasciotomies performed on the patients were on account of IRS. Seven patients were subjected to wound treatment using the VAC-system device and eight patients underwent treatment through the usual conservative method. The data were analysed by comparing the operative wound size, length of time for wound closure and duration of hospital stay in both groups. The number of days after fasciotomy until surgical wound closure in the VAC-system group (n = 7) ranged from 8 to 13 days with a mean of 11 days. The wound size at the day of closure was decreased in length by a mean of 58% (range 29-67%) and in diameter by a mean of 56% (range 33-75%). The duration of hospital stay for this group ranged from 12 to 18 days with a mean of 14 days. No signs of infections were observed and no re-operation was required after first closure. In the conservative group (n = 8), the time to wound closure ranged between 12 and 20 days with a mean of 15 days. The wound size was decreased in length by a mean of 40% (range 32-53%) and in diameter by a mean 46% (range 30-70%). The mean duration of hospital stay was 18·5 days. Three of the patients in the conservative treatment group manifested wound infection during the course of the treatment. VAC device could be a new standard for treatment of fasciotomy wound. VAC therapy is a recent innovation and becoming more and more a necessary complementary therapy to hasten wound healing. In our preliminary study, the VAC-system device showed significantly reduction of the wound size, decreased tissue oedema, duration of hospital days and improvement of granulation tissue.

[The electroacupuncture in patients recently operated for peripheral arterial disease. A comparative study of the two electrostimulation techniques]. / Electroacupunctura la bolnavii vasculari periferici recent operati. Studiu comparativ a doua tehnici de electrostimulare.

UNLABELLED: Possible hemodynamic effects of electro acupuncture (A), by two electro stimulation techniques, were studied at patients with femuro - popliteal bypass revascularization. MMATERIAL AND METHOD:In a prospective study, we evaluated two EA techniques, by calculating the ankle-brachial index (ABI) and by estimating the pain with Numeric Rating Scale (NRS: 0 - 10). The patients were grouped in lot A (30 patients) and B (50 patients) according with the EA technique used. In both lots were used the same acupuncture points (acupoint): Pc6, P9, St36 and Sp6. These acupoints are adjacent to peripheral nerves median, radial, peroneal and safenous nerve. Needles, after insertion, were kept in place for 30 minutes. The electro stimulation (2 Hz) was only for 2 minutes in the lot A and for 30 minutes in the lot B. RESULTS: The blood pressure data and ABI shows a significant increase of ABI (between 0.033 and 0.052) after EA at 5 minutes in the both lots (p < 0.05). At 30 minutes, ABI is increased in lot B, but in the lot A the ABI is elevated only at the non surgical leg (p < 0.05). The decrease of pain post EA is better in the lot B (NRS: initially 2.48--post EA pain decreased to 1.46 and remained 1.66 at 2 hours; p < 0.001), than lot A. CONCLUSIONS: The electro stimulation of certain acupoints, at the operated peripheral arterial disease patients, interfere with tissular perfusion and increase temporally ABI. The pain is diminished more significantly by the 30 minutes electro stimulating technique.

Impact of cardioselective beta-blockers on mortality in patients with chronic obstructive pulmonary disease and atherosclerosis.

RATIONALE: beta-Blocker use is associated with improved health outcomes in patients with cardiovascular disease. There is a general reluctance to prescribe beta-blockers in patients with chronic obstructive pulmonary disease (COPD) because they may worsen symptoms. OBJECTIVES: We investigated the relationship between cardioselective beta-blockers and mortality in patients with COPD undergoing major vascular surgery. METHODS: We evaluated 3,371 consecutive patients who underwent major vascular surgery at one academic institution between 1990 and 2006. The patients were divided into those with and without COPD on the basis of symptoms and spirometry. The major endpoints were 30-day and long-term mortality after vascular surgery. Patients were defined as receiving low-dose therapy if the dosage was less than 25% of the maximum recommended therapeutic dose; dosages higher than this were defined as intensified dose. MEASUREMENTS AND MAIN RESULTS: There were 1,205 (39%) patients with COPD of whom 462 (37%) received cardioselective beta-blocking agents. beta-Blocker use was associated independently with lower 30-day (odds ratio, 0.37; 95% confidence interval, 0.19-0.72) and long-term mortality in patients with COPD (hazards ratio, 0.73; 95% confidence interval, 0.60-0.88). Intensified dose was associated with both reduced 30-day and long-term mortality in patients with COPD, whereas low dose was not. CONCLUSIONS: Cardioselective beta-blockers were associated with reduced mortality in patients with COPD undergoing vascular surgery. In carefully selected patients with COPD, the use of cardioselective beta-blockers appears to be safe and associated with reduced mortality.

Comparison of quality of life of persons who have experienced amputations and persons who have had bowel resections.

Comparing the quality of life of persons who have experienced amputations and persons who have had bowel resections illustrates the impact of chronic disease upon all aspects of a patient's life. Because the purpose of nursing research is to bring about knowledge to better direct patient care, understanding the impact of chronic illness contributes to an improvement in the quality of life of these patients. By appreciating the patient's perspective concerning the illness, the nurse can better educate the patient in all aspects of the disease process. Based on Jean Watson's Theory of Human Caring, this study acknowledged the need for evidence-based nursing practice to care for the well-being of the patient in a holistic manner. Our hypothesis was adult patients after Crohn disease-related bowel resection experience a better quality of life than do adult patients with peripheral vascular disease related amputation. This descriptive comparative study had a sample of patients with Crohn disease and resection (n = 28) and patients with peripheral vascular amputation (n = 16). The instrument used to measure quality of life was the RAND-36 Item Health Survey 1.0. Results revealed significant differences between the patients with bowel resection and those with peripheral vascular amputation with regard to physical functioning, general health, and role limitations related to physical health. No significant differences existed between the two groups in terms of energy/fatigue, emotional well-being, social functioning, role limitations related to emotional problems, and pain. Results from the data may indicate that the incorporation of more education regarding social, emotional, physiological, and psychological aspects of postoperative life may be of importance to evidence based nursing practice. This addition may also lead to better adjustment to postoperative life for patients and improve overall quality of life.

Factors associated with future amputation among patients undergoing hemodialysis: results from the Dialysis Morbidity and Mortality Study Waves 3 and 4.

BACKGROUND: Amputation is more common in hemodialysis patients than in the general population, but risk factors for amputation in this population have not been studied extensively. METHODS: We used the US Renal Data System Dialysis Morbidity and Mortality Study Waves 3 and 4 in combination with Medicare discharge data to identify factors associated with lower-extremity amputation (excluding toe amputations) in hemodialysis patients. We used stepwise multivariable logistic regression analysis to identify variables most strongly associated with amputation within 2 years of the study start date. RESULTS: Male sex, diabetes, previous diagnosis of peripheral vascular disease (PVD), mean systolic blood pressure, and elevated serum phosphorus level were associated with the outcome of amputation within 2 years of the study start date. Among patients without diabetes, a previous diagnosis of cardiac disease, longer time from initiation of dialysis therapy (vintage), and previous hospitalization for limb ischemia were associated with increased risk for future amputation. CONCLUSION: The importance of preventing amputation in this population cannot be overemphasized. The strength of the association of amputation with PVD makes a strong case for screening all dialysis patients for this disease. The association of amputation with serum phosphorus level reported here should be explored further because this may offer an avenue for future intervention to reduce amputation rates.

Intermittent claudication: cost-effectiveness of revascularization versus exercise therapy.

PURPOSE: To compare the costs, effectiveness, and cost-effectiveness of alternative treatment strategies for intermittent claudication. MATERIALS AND METHODS: By combining data from the literature and original patient data, a Markov decision model was developed to evaluate the societal cost-effectiveness. Patients presented with previously untreated intermittent claudication, and treatment options were exercise, percutaneous transluminal angioplasty (with stent placement, if necessary), and/or bypass surgery. Treatment strategies were defined as the initial therapy in combination with secondary treatment options should the initial therapy fail. The main outcome measures were quality-adjusted life days, expected lifetime costs (in 1995 U.S. dollars), and incremental cost-effectiveness ratios. RESULTS: Compared with an exercise program, revascularization (either angioplasty or bypass surgery) improved effectiveness by 33-61 quality-adjusted life days among patients with no history of coronary artery disease. The incremental cost-effectiveness ratio was $38,000 per quality-adjusted life year gained when angioplasty was performed whenever feasible, as compared with exercise alone, and $311,000 with additional bypass surgery. The incremental cost-effectiveness ratios were sensitive to age, history of coronary artery disease, estimated health values for no or mild claudication versus severe claudication, and revascularization costs. CONCLUSION: The results suggest that, on average, the expected gain in effectiveness achieved with bypass surgery for intermittent claudication is small compared with the costs. Angioplasty performed whenever feasible was more effective than was exercise alone, and the cost-effectiveness ratio was within the generally accepted range.

Intermediate rehabilitation outcome in below-knee amputations: descriptive study comparing war-related with other causes of amputation.

AIM: To asses the intermediate rehabilitation outcome of patients with war-related below-knee amputations and compare it with the patients with other causes of amputation. METHOD: The study comprised 74 patients with below-knee stumps admitted for rehabilitation at the Department of Physical Therapy and Rehabilitation, Split University Hospital, Croatia, in 1994. They were fitted with a preliminary prosthesis, a donation from the Finish Red Cross. The rehabilitation was performed by a professional team and included regular bandaging of the stump, exercises to prevent knee and hip joint contracture, general fitness exercises, standing-up, falling and walking exercises, and electrostimulation of the thigh muscles. The time to reach each rehabilitation phase (walking with 2 crutches, walking with 1 crutch, walking with no crutches) was measured. The satisfaction of the patients with the prosthesis was also assessed at the end of rehabilitation. RESULTS: Among 74 patients with below knee amputation, war trauma was the cause for amputation in 31 patients, and in 6 of them the amputations were bilateral. Patients with war-related below-knee amputations were younger than the patients with amputations related to vascular disease, including diabetes. The rehabilitation time was significantly shorter in patients with war-related amputations (61.1+/-11.4 days to walking with no crutches) compared with patients with vascular disease-related amputations (80.9+/-8.1 days; p<0.001). The satisfaction with the prosthesis was more variable in patients with war-related amputations than in other patients. CONCLUSION: Early physical rehabilitation and replacement of the lost extremity with a preliminary prosthesis is an optimal intervention in below-knee amputations due to war-injury. Special attention should be paid to the psychological support to these patients during rehabilitation therapy.

Enhanced limb salvage for peripheral vascular disease with the use of spinal cord stimulation.

For patients with peripheral vascular disease that have exhausted all means for surgical repair, spinal cord stimulation is an alternative treatment that could offer them significant pain relief or possibly delay the need for limb amputation. Spinal cord stimulation (SCS) has proven to offer many of these patients a return to a more normal lifestyle by relieving pain to such a degree that their mobility is improved. In addition, increases in blood flow to the affected extremity have helped to improve overall foot salvage. Since SCS is minimally invasive and has few reported complications, it is a viable alternative for patients with multiple health risks, and with proper patient selection and early referral, it can reduce health care costs in many cases.

Cost-effectiveness of MR angiography in cases of limb-threatening peripheral vascular disease.

PURPOSE: To evaluate the cost-effectiveness of magnetic resonance (MR) angiography in the preoperative planning of treatment in patients with limb-threatening peripheral vascular disease (PVD). MATERIALS AND METHODS: A decision model was developed to study the effects of MR angiography on the outcome and cost of treatment. The authors calculated the incremental cost per quality-adjusted life-years gained (ie, cost-effectiveness ratio) when conventional angiography was replaced or supplemented with MR angiography. Previously reported data regarding the accuracies of MR and conventional angiography were used in the analysis. RESULTS: The cost-effectiveness ratio of MR angiography ranged from negative (cost-reducing) values to $78,000. For the base case in which the sensitivity and specificity of MR angiography for the evaluation of inflow vessels were 92% and 88% and those of conventional angiography were 97% and 97%, respectively, the cost-effectiveness ratio was $25,895. CONCLUSION: MR angiography may be a cost-effective alternative to conventional angiography in patients with limb-threatening PVD if its accuracy for the inflow evaluation reaches certain thresholds. Further prospective investigation is warranted.

Bioenergetic comparison of a new energy-storing foot and SACH foot in traumatic below-knee vascular amputations.

In this study, the metabolic performances of a new energy-storing foot (Proteor) and of the solid-ankle cushion heel (SACH) are compared. Twelve patients with traumatic below-knee amputations (mean age: 50.0 +/- 19.9 years) and 12 patients with vascular below-knee amputations (mean age: 73 +/- 7 years) were studied. Oxygen uptake (VO2) was measured in all the subjects on a walkway at a self-selected velocity; only the subjects with traumatic amputation were tested on a level treadmill (progressive speed: 2.4-4 and 6 km/h), and then in two randomized trials: incline (+5%) and decline walking treadmill test at 4 km/h. Vascular explorations were done in the vascular patients: distal pressure measurements, pulse plethysmography, transcutaneous oxygen tension. Free walking was improved in subjects with traumatic amputation using the energy-storing foot (+6%), with a better bioenergetic efficiency (0.24 +/- 0.4mL/kg.m vs 0.22 +/- 0.04mL/kg.m). However, in subjects with vascular amputation, this foot did not produce an increased free velocity nor an improved energy cost. During the level treadmill test, the traumatic amputee subjects showed a decrease of energy expenditure with the new prosthetic foot, more significant at sufficient speed (4 km/h): 17.00 +/- 3.42 vs 14.67 +/- 2.05 mL/kg/min (p < .05). The same effect is shown during the incline (19.31 +/- 2.80 vs 16.79 +/- 2.32 mL/kg/min-p < .02) and decline walking tests (14.13 +/- 3.64 vs 11.81 +/- 1.54mL/kg/min-p < .02). There is no significant difference in cardiocirculatory effects between the two types of prosthetic foot. Despite a lower velocity, the subjects with vascular amputation exceed 70% of the maximal heart rate, with the cardiocirculatory factor being the main cause of walking restriction. The energy-storing foot should be reserved for active and fast walkers, whereas the SACH foot seems more suitable for elderly patients with amputation with a slow walk.

Phosphorus magnetic resonance spectroscopy of the calf muscle in patients with peripheral arterial occlusive disease.

RATIONALE AND OBJECTIVES: To investigate the potential of 31P magnetic resonance spectroscopy (MRS) in the management of severe peripheral ischemic disease, phosphocreatine:inorganic phosphate (PCr:Pi) and PCr:adenosine triphosphate (PCr:ATP) ratios were compared with a clinical ranking of arterial insufficiency. METHODS: 31P MR spectra of the muscles in the lower and upper leg were measured in a group of healthy volunteers (n = 21) and in a group of patients (n = 42) with arterial occlusive disease. The patients were graded according to the categories advised by the Ad Hoc Committee on Reporting Standards (AHCRS). Spectra were obtained 12 and 20 cm below and 15 cm above the knee joint. RESULTS: The PCr:Pi ratio showed a significant decrease between measurements 12 and 20 cm below the knee joint for patients with severe arterial insufficiency (AHCRS 4-6), whereas this decrease was not found in patients with mild or moderate arterial insufficiency (AHCRS 1-3). CONCLUSIONS: Although the observed spatial variation in PCr:Pi ratio measured at rest does not offer profound insight into muscle physiology, the authors' results suggest that MRS may be useful in assessing the severity of peripheral vascular disease.

Changing patterns in the predisposition for amputation of the lower extremities.

The purpose of this study was to evaluate and determine the role of diabetes and other common predisposing factors in amputation of the lower extremities. A retrospective review of 110 patients with peripheral vascular disease who underwent amputation between 1987 and 1990 at Hahnemann University Hospital (Philadelphia, PA) was performed. Patients who underwent amputations for trauma or cancer were excluded from this analysis. The patients were divided into four groups according to the site of amputation: Above Knee (n = 43), Below Knee (n = 26), Foot (n = 7) and Transmetatarsal (n = 34). The mean age was 60 years. Fifty-five patients (51%) were white. Sixty-four patients (58%) were men. Twenty-nine patients (26%) were cigarette smokers; sixteen smokers (55%) had above-knee amputation. Thirty-five patients (32%) had previous vascular surgery of the lower extremities. The combination of diabetes and hypertension was present in 40 patients (36%). When either diabetes or hypertension alone was present in a patient, hypertension, not diabetes, was more commonly the dominant underlying medical condition in patients with amputation (32 hypertension-alone patients vs. 10 diabetes-alone patients). The high frequency of hypertension suggests that enhanced control of this disease may affect peripheral vascular disease and related amputations in the future.