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Query: UMLS:C0149871 (deep vein thrombosis)
 12,364 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Eight prospective, controlled, randomised studies on the incidence of postoperative thrombosis in gynaecological patients receiving various drugs for prevention of thromboembolism are analysed. In all patients diagnosis had been established by objective means. The rate of thrombosis in patients without drug prophylaxis has been found to vary between 14 and 29%. Infusions of dextran as well as administration of low-dose subcutaneous heparin significantly reduce the incidence of deep vein thrombosis, even as compared to postoperative oral anticoagulation with cumarins. No difference has been found between dextran and oral anticoagulants, when cumarin adminstration was started before operation, nor between dextran and heparin. Aescin did not show any prophylactic effect. High age, severe leg-vein varicosis as well as surgery for malignant disease increase the risk of thrombosis. No significant influence of overweight, previous deep venous thrombosis, epidural anaesthesia or vaginal operation as compared to abdominal approach could be demonstrated. There are no properly controlled, prospective, randomised studies on the incidence of postoperative fatal pulmonary embolism as influenced by drugs in gynaecological surgery.
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PMID:[Prophylaxis of thromboembolic complications in gynecological surgery (author's transl)]. 87 Mar 88

A range of clinical data was obtained from 124 patients about to undergo operation and several coagulation tests were performed. No patient received prophylaxis for deep vein thrombosis, and isotopic scanning after operation showed that 20 patients had developed thrombosis. a simiple prognostic index for predicting which patients would develop postoperative deep vein thrombosis was constructed using the clinical and coagulation data obtained before operation. The five variables with the best predictive power-euglobulin lysis time, age, presence of varicose veins, fibrin related antigen, and percentage overweight-produced an equation that identfied 95% of those who developed deep vein thrombosis and misallocated only 28% of those who did not develop thrombosis. In view of the complications that low-dose heparin and dextran can cause, giving prophylaxis to under a third of the patients who will not develop deep vein thrombosis is clearly better than giving it to all.
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PMID:Preoperative prediction of postoperative deep vein thrombosis. 97 58

A 16 year old teenager with chest pain came to the emergency room at Children's Hospital in Charleston, South Carolina. Her sharp, constant midsternal pain and breathing difficulties began the morning of admission. 1 week before admission, she experienced a similar but less intense pain which resolved spontaneously. She was taking low-dose, triphasic oral contraceptives (OCs) as treatment for severe dysmenorrhea and dysfunctional uterine bleeding. She had no family history of elevated lipids, blood or clotting disorders, and cardiovascular disease. She did not smoke. She was obese (137.3 kg). She had elevated blood pressure (147/33 mm Hg), a high low-density lipoprotein count (140 mg/dL), and a high total cholesterol count (237 mg/dL). Her tender right calf was larger than the left calf. She had decreased perfusion of the entire left lung and right lower lobe. A pulmonary angiogram revealed emboli, and ultrasound of the legs revealed a thrombus behind the right knee. The physicians discontinued the OCs. They administered 2 anticoagulants--intravenous heparin followed by oral sodium warfarin for 6 months. Her respiratory distress ended within several days. Her right calf was no longer tender after 1 week. The physicians discharged her on a low-cholesterol, low-fat diet. They suggested she reduce her weight and exercise more often. She did not experience another venous thrombosis or pulmonary embolus. It appeared that the OCs contributed to her thromboembolism; yet, she did lead a sedentary lifestyle and was considerably overweight. Even though thromboembolism is rare in adolescents with no underlying predisposition for cardiovascular disease and who do not smoke, physicians should watch for sizeable changes in blood pressure, lipids, and cholesterol level as well as symptoms of deep venous thrombosis and cardiovascular disease.
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PMID:Pulmonary embolus in an adolescent on oral contraceptives. 129 Jul 74

Postoperative thromboembolic complications do present an underestimated problem whenever their detection simply relies upon individual clinical judgement. Major abdominal operations are at increased risk of pulmonary embolism (PE) and deep vein thrombosis (DVT), mostly in advanced age, overweight subject, and in patients with cardiac or malignant diseases, or with previous venous diseases. Such patients may benefit from a peri- and postoperative prophylaxis with chemical or mechanical procedures, as a recent meta-analysis seems to suggest. In our experience, a randomized, multicentric clinical trial with defibrotide (DF) versus calcium-heparin (CH) was realized with the aim of evaluating their effectiveness and side effects in the prophylaxis of PE and DVT after major abdominal surgery; 1296 patients were randomly assigned to i.v. DF (400 mg.) or subcutaneous CH (0.2 ml. = 5000 U.I.) given one hour prior to operation and twice daily for seven days postoperatively. Definitive evaluation was carried out on 1212 patients (610 patients in DF and 602 in CH group, respectively) who completed the prophylaxis and monitoring schedule acceptably. One PE (0.16%) and 38 DVT (6.2%) were detected in DF group while 2 PE (0.33%) and 40 DVT (6.6%) were reported in CH treated patients. Post-operative blood loss was 578 +/- 150 cc. (median +/- S.E.M.) in DF group and 604 +/- 123 in CH group (p = n.s.). Wound hematoma was observed in 69 patients (5.7%): 20 (3.2%) in DF and 49 (8.1%) in CH group of patients (CHI-Square = 12.44; p = 0.0005); a significant post-operative decrease of RBC, WBC, Platelet count, and Fibrinogen was computed in both groups (p less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[The postoperative prevention of deep venous thrombosis and pulmonary embolism with defibrotide versus heparin-calcium: a randomized clinical multicenter study of 1296 patients undergoing major abdominal surgery]. 160 51

The incidence of pulmonary embolism determined by perfusion - ventilation lung scintigraphy was 19% in 108 consecutive patients undergoing elective hip operations. Twelve patients had clinical symptoms. The sensitivity of clinical symptoms was 30 and the specificity 93%. Warfarin was used as prophylactic anticoagulant. The incidence of deep vein thrombosis examined by contrast venography was 43%. Only one patient developed femoral vein thrombosis propagating from the calf region. From the clinical risk factors, overweight had a statistically significant relationship to thromboembolism (p = 0.005). Age over 60 years was positively associated but the difference was not significant. When operation time exceeded 150 min the risk increased significantly (p less than 0.01). A large volume of blood loss at operation showed an increased but statistically insignificant trend towards thromboembolism. There were no fatal emboli. Although prophylactic warfarin treatment is not able to prevent the development of thromboembolism, it probably reduces the incidence of fatal pulmonary emboli. Of clinical and operative risk factors overweight and increasing operation time seem to have the strongest relationship to thromboembolism.
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PMID:Postoperative thromboembolism and risk factors in elective hip surgery. 663 5

A prospective study was carried out to confirm the validity of a predictive index for patients at risk of developing deep vein thrombosis. The index, which correctly identified nine out of 10 patients and incorrectly identified seven out of 52 patients as being at risk, is based on five variable--namely, the euglobulin lysis time, serum concentration of fibrin-related antigen, age, percentage overweight for height, and presence of varicose veins. Thus a population of patients at particularly high risk of developing postoperative deep vein thrombosis may be identified preoperatively by means of this index, so that prophylaxis may be used more rationally.
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PMID:Postoperative deep vein thrombosis: identifying high-risk patients. 742 71

It is argued that the British media exposure of the potential harmful side effects from oral contraceptive use contributed to raising fears and panic among users. The government in 1995 announced that there was double the risk of deep vein thrombosis from use of contraceptive pills containing gestodene or desogestrel. The government was advised by the Committee on Safety of Medicines. The British Pregnancy Advisory Service (BPAS) announced that the rise in abortions after the announcement could have been due to the pill scare. BPAS reported that during December 1995-February 1996 the number of abortions performed increased by 823 over the number reported in the same period a year before. The increase reversed a declining trend in abortions performed by a service that carries out 20% of all abortions in Great Britain. A BPAS spokesperson suggested that women panicked and stopped taking their pills, even though the government warned against an abrupt stop in usage. Women appeared to have not understood that risk was highest among overweight women and women with a prior history of thromboses. Findings from a BPAS survey that was conducted among almost 300 women with unplanned pregnancies showed that over 40% of women stopped taking their contraceptive pills immediately after the government's warning. 61% did not finish taking their remaining pills in the month's cycle. Under 20% of women switched to another contraceptive method. Another BPAS survey among 90 women that sought contraceptive advice at BPAS clinics found that nearly 50% of women expected the pill to be an unsafe method. It was suggested that media messages should have emphasized that the risk of unplanned pregnancies was much greater than the risks of deep vein thromboses.
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PMID:Pill scare linked to rise in abortions. 861 88

Problems encountered during anesthesia procedures in obese subjects is related to the level of overweight. Obesity multiplies the effect of general anesthesia on the respiratory function and increases the postoperative risk of cardiovascular disorders and deep vein thrombosis. The pharmacokinetic behavior of most general anesthesia drugs is affected by the mass of adipose tissue producing a prolonged less predictable effect. Control of airway permeability and continence is also a major problem with predictable or unpredictable difficulties with endotracheal intubation. Locoregional anesthesia, which avoids the intubation problem, is difficult to implement and does not provide satisfactory results in all cases. The preoperative work-up should assess the consequences of obesity, particularly concerning the respiratory, cardiovascular, and metabolic systems. A proper work-up allows the anesthesist to provide the obese subject with well-informed information on the risk and benefit of proposed options.
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PMID:[Anesthesia and obesity]. 1208 51

Since its introduction in 1982, the transverse rectus abdominis musculocutaneous (TRAM) flap has become the standard therapy in autogenous breast reconstruction. A lower rate of partial flap (fat) necrosis is associated with microvascular free-flap transfer compared with the conventional (unipedicled) TRAM flap because of its potentially improved blood supply. A TRAM flap delay before flap transfer has been advocated, especially in a high-risk patient population (obesity, history of cigarette smoking, radiation therapy, or abdominal scar). The authors reviewed a series of 76 consecutive delayed unipedicled TRAM flap breast reconstructions during a 5-year period. Data were analyzed with respect to type of procedure and time of delay, overall outcome, general surgical complications, flap-related (specific) complications (partial or complete flap loss), and patient satisfaction. Seventy-six unilateral breast reconstructions using the unipedicled TRAM flap were performed between 1995 and 2000 in 76 patients (mean age, 47.4 years). Fifty-four flaps were performed as immediate reconstructions, and 22 as secondary procedures. Seventy-two flaps were based on the contralateral pedicle, and four flaps were based on an ipsilateral pedicle. In all cases, a flap delay consisted of ligature of both deep inferior epigastric arteries and veins, accessed from an inferior flap incision down to the fascia, with a mean of 13.9 days before the flap transfer. No acute flap take-back procedure had to be performed. There was no complete flap loss, and breast reconstruction was achieved in all cases. In five cases (6.6 percent), a partial (fat) flap necrosis occurred. Interestingly, the majority of these cases (four of five) were secondary breast reconstructions. In addition, of the five patients who had partial flap necrosis, four had a history of smoking, two received radiation therapy, three received chemotherapy, and three patients were obese (body mass index greater than or equal to 30) or overweight (body mass index greater than or equal to 25). In three cases, an early surgical complication (two wound infections at the flap interface and one at the donor site) occurred. One patient developed a deep vein thrombosis. Five patients developed secondary ventral hernias necessitating repair (6.6 percent). Forty-one patients underwent secondary nipple-areola reconstruction. In 19 patients of this group, a secondary procedure (e.g., scar revision, limited liposuction, and/or excision of contour deformities) was simultaneously performed. A survey of patient satisfaction was performed using a modified SF-36 questionnaire. Fifty-one patients participated (67 percent). The overall satisfaction was very high and 51 patients reported that they would recommend the procedure to others (100 percent). Multiple factors such as patient selection, surgical expertise, and preoperative and postoperative management contribute to the success of any type of autogenous breast reconstruction. However, rare partial and absent complete flap necrosis in the authors' series may be attributable to the flap delay. A low morbidity rate and short hospital stay may become increasingly relevant, with limited structural and financial resources in the future. Therefore, the delayed unipedicled TRAM flap should be regarded as a valuable option in attempted breast reconstruction using autogenous tissue in both a high-risk and the general patient population.
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PMID:Delay in unipedicled TRAM flap reconstruction of the breast: a review of 76 consecutive cases. 1279 7

Post-thrombotic syndrome (PTS) is a chronic complication of deep vein thrombosis (DVT). Little is known about prognostic factors that might identify patients at high risk for the development of PTS. Body mass index (BMI) has been previously reported to be associated to the development of PTS. The aim of this study was to assess the association between BMI and other anthropometric parameters and PTS in a general population of DVT patients. In a prospective cohort study, 83 consecutive patients with objective diagnosis of DVT underwent physical examination. BMI was recorded at baseline and at 12 months, and waist circumference was recorded at 12 months to assess individual patterns of body fat distribution. The presence of PTS at 12 months was ascertained using a validated clinical scale. Sixty-three patients (75.9%) were overweight or obese at 12 months, 60 (72.3%) had a weight gain over 1 year. Twenty patients developed PTS (24.1%). Mean BMI was significantly higher in patients who developed PTS than in patients who did not (29.6 and 27.2 Kg/m(2), respectively, p = 0.022). A BMI of > 28 Kg/m(2) predicted early onset of PTS (OR 3.54, 95% CI 1.07-12.08, p = 0.017). Neither patterns of fat distribution nor weight gain in 1 year were correlated with PTS (p = 0.918 and p = 0.775, respectively). BMI is significantly correlated with the development of PTS. Patients with DVT should be encouraged to avoid weight gain. Reducing patient weight might be an important strategy to prevent PTS.
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PMID:Body mass index is associated with the development of the post-thrombotic syndrome. 1257 11


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