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PubMed1990

Sequential gradient pneumatic compression enhances venous ulcer healing: a randomized trial.

The treatment of venous ulcers has remained largely unchanged for centuries. The application of properly applied graduated compression bandages, the use of graduated compression stockings, and surgery have been shown to achieve healing. However, some ulcers persist despite appropriate management. A randomized study was undertaken to compare two regimens of treatment for such patients. Both regimens included ulcer debridement, cleaning, nonadherent dressing, and graduated compression stockings. In one regimen, sequential gradient intermittent pneumatic compression was applied for 4 hours each day. Only one of 24 patients in the control group had complete healing of all ulcers compared with 10 of 21 patients healed in the intermittent pneumatic compression group. The median rate of ulcer healing in the control group was 2.1% area per week compared to 19.8% area per week in the intermittent pneumatic compression group. The results indicate that sequential gradient intermittent pneumatic compression is beneficial in the treatment of venous ulcers.

Adult↗
PubMed1985

Prevention of postoperative deep venous thrombosis. Low-dose heparin versus graded pressure stockings.

In a prospective, controlled clinical study prevention of postoperative deep venous thrombosis by low-dose heparin (Heparin Leo 5 000 I.U. subcutaneously twice daily) was compared with graded compression stockings (TED stockings, Kendall Co.). One hundred and twelve patients, admitted during a period of one year for elective major surgery, were allocated to one of the two treatment groups. In order to detect deep venous thrombosis the 99mTc-plasmin test was performed before the operative procedure and again 5 days later. Ninety-seven patients completed the study (45 patients in the heparin group and 52 patients in the stocking group). Venous thromboembolism was detected in 4 patients (8.9%) in the heparin group and in 3 patients (5.8%) in the stocking group (p greater than 0.05). In 6 patients the plasmin test was positive and one patient in the heparin group died following pulmonary embolism. It is concluded that graded compression stockings can be used as an alternative to low-dose heparin for prophylaxis against deep venous thrombosis in elective general surgery.

Adult↗
PubMed1994

Deep venous thrombosis following lumbar laminotomy and laminectomy.

Sixty consecutive patients undergoing lumbar laminotomy or laminectomy underwent preoperative and postoperative compression ultrasonography of the lower extremities to detect acute deep venous thrombosis (DVT). Compression stockings were the only method of prophylaxis. Three patients (5%) developed postoperative calf DVT. Despite continued treatment with only compression stockings, serial scanning failed to detect propagation of the thrombus proximal to the knee in any patient. The average age of patients who developed DVT, 62 years, was significantly greater (P < .05) than the age of patients who did not, 45 years. There were no statistically significant differences in DVT rates when compared by: sex, addition of one- or two-level fusion, length of procedure, or number of days of bedrest.

Adolescent↗
PubMed2001

The oedema-protective effect of Lycra support stockings.

BACKGROUND: Oedema may be an early sign of chronic venous insufficiency (CVI), but swelling of the lower legs is a common phenomenon in many people. The distinction between physiological swelling and CVI is not clear. There is a gradual transition between healthy legs and the early stages of CVI. In case of CVI, medical elastic compression stockings are used in order to prevent oedema completely. In case of healthy people without demonstrable CVI, no medical stockings are required in the prevention of oedema but stockings exerting less compression. OBJECTIVE: The aim of this study was to investigate the effect of mild compression on the development of swelling of the legs and the effect on subjective complaints in healthy subjects. METHODS: The diurnal volume change (DVC) of the lower legs during full working days was monitored with an optical leg volume meter in 118 healthy volunteers (60 males, 58 females) without objective symptoms of CVI. The DVCs after wearing two kinds of class I support stockings (X: average pressure at the ankle of almost 14 mm Hg; Y: almost 18 mm Hg) were compared with the DVC after wearing a control stocking (Z: almost 6 mm Hg). Also, the effect on subjective feelings of the legs was noted. RESULTS: It appeared that healthy people have a mean daily volume increase of the legs of 2.3% in females and 1.6% in males. Mild compression stockings reduced this daily increase with 31 and 18% in males and females, respectively, by stocking X and 37 and 32% by stocking Y. Subjective feelings occurred in 57% of all cases. A beneficial effect on subjective feelings, in particular of tired and swollen legs, was found. A difference in this beneficial effect between stocking X and Y was not obvious. CONCLUSIONS: Mild compression stockings reduce diurnal oedema and unpleasant feelings of the legs in healthy individuals.

Adult↗
PubMed1994

A meta-analysis of methods to prevent venous thromboembolism following total hip replacement.

OBJECTIVE: While several methods of prophylaxis have been shown to reduce the risk of venous thromboembolism following total hip replacement, the safest and most effective agent is unclear. To clarify this issue, we performed a meta-analysis of the randomized trials of methods used to prevent venous thromboembolism following total hip replacement. DATA SOURCE: English-language human studies articles from 1966 through 1993 were obtained from a MEDLINE database search with indexing terms including thromboembolism, hip replacement or hip prosthesis, and randomized controlled trials. Additional references were obtained from study bibliographies. STUDY SELECTION: The following criteria were used to select studies for inclusion: study design--randomized clinical trial; study population--patients undergoing elective total hip replacement; interventions--aspirin, warfarin, dextran, heparin, low-molecular-weight heparin, compression stockings; and outcomes--venous thromboembolism, major hemorrhage. DATA EXTRACTION: Methodological and descriptive data from each study were abstracted by one author who was blinded to quantitative outcomes data. DATA SYNTHESIS: Ninety-one treatment groups and 25 control groups were identified from 56 trials. Four treatment groups were excluded because of rarely used combinations. Trial populations were clinically homogeneous. When compared with the control arm, all treatments except aspirin reduced the risk of all deep venous thromboses (risk differences range, 0.18 to 0.31; all P values < .05). All treatments except aspirin reduced the risk of proximal venous thrombosis (risk differences range, 0.09 to 0.18; all P values < .05). Only low-molecular-weight heparin and stockings reduced the risk of pulmonary embolism, both with risk differences equal to 0.02. The crude risks of clinically important bleeding as defined by the individual trials were 0% for stockings, 0.3% for controls, and 1.8% for low-molecular-weight heparin. CONCLUSIONS: The results suggest that low-molecular-weight heparin and compression stockings have the greatest relative efficacy in preventing venous thromboembolism following total hip replacement. Low-molecular-weight heparin may be more effective, though at a small risk of clinically important bleeding.

Aspirin↗
PubMed1999

Measurement of forces associated with compression therapy.

Compression therapy is the principal treatment for leg ulcers associated with venous disease. The efficacy of compression therapy can be variable, which may in part be owing to the degree of compression applied. However, if the mechanism of action of this treatment could be better understood, it might be possible to improve its efficacy. It is not clear whether assessment of the degree of compression should be made under static or dynamic conditions, or both. A review of methods used previously suggests the need for a new method of assessment allowing continuous monitoring, even during movement. A system for continuous static and dynamic measurements of compression is described. Using an air chamber and manometer to test the system, agreement within +/- 3 mmHg is observed. The system is applied to investigate changes in forces, expressed as pressure, under bandages and compression stockings. Application of five bandage systems by experienced nurses to a volunteer shows a marked variation in applied pressure. During short periods of walking, rapid changes in pressure under compression stockings are observed, including some transients of less than 0.25 s. The method is simple to apply and may help to understand further the mechanism of action of compression therapy.

Bandages↗
PubMed2001

[Thromboembolic prophylaxis after major abdominal surgery].

PURPOSE: To investigate the efficacy of prophylaxis modalities after major abdominal surgery. PATIENTS AND METHODS: Patients who underwent major abdominal surgery between October 1998 and October 1999 were randomly divided into 3 groups. The patients in Group 1 received compression stockings, in Group 2 0.3 ml low-molecular weight heparin (nadroparine calcium 0.3 ml, 2850 IU AXa LMWH) subcutaneously and in Group 3 compression stockings and 0.3 ml LMWH. All symptomless patients evaluated with low extremity deep venous Doppler ultrasonography (DUSG), and patients who had pulmonary embolus (PE) suspicion evaluated with pulmonary scintigraphy. RESULTS: There were 91 patients in Group 1, 91 patients in Group 2 and 92 patients in Group 3. The mean age was 57.25 +/- 13.12, 54.53 +/- 13.54, and 53.65 +/- 13.28 respectively. Male/female ratio was 51/38, 56/35 and 62/30, in Group 1, 2 and 3 respectively. Twenty-seven patients in Group 1, 26 patients in Group 2 and 37 patients in Group 3 had risk factors. DUSG showed deep venous thrombosis (DVT) on the 7th postoperative day in 10 patients in Group 1, in 8 patients in Group 2 and in 3 patients in Group 3. Pulmonary scintigraphy showed PE suspicion in 6 patients in Group 1, 1 patient in Group 2 and 1 patients in Group 3. Wound hematoma and hemorrhage from abdominal drains were developed in 1/0, 8/2 and 3/1 patients in Groups 1, 2 and 3 respectively. Four patients in Group 1 and 2 patients in Group 2 died during the treatment (2.2%). Satistical analysis showed significant differences in PE and wound hematoma between Groups 1 and 2, in DVT and PE between Groups 1 and 3, in risk factors between Groups 2 and 3 (p < 0.05). The differences in DVT and PE and hematoma between group 2 and 3 were not significant. CONCLUSION: All treatment modalities could not prevent all thromboembolic complications. In our study combined treatment was the most effective one.

Abdomen↗
PubMed2005

Systematic review of thromboprophylaxis in colorectal surgery -- an update.

OBJECTIVE: The incidence of thromboembolism after colorectal surgery is higher than after general surgery. The aim of this paper is to update a systematic review addressing thrombosis prophylaxis in connection with colorectal surgery. METHODS: MEDLINE, EMBASE, LILACS, abstract books and reference lists from reviews were searched without language restrictions for randomized controlled trials or clinical controlled trials comparing prophylactic interventions and/or placebo up til August 2003. Five hundred and fifty-eight studies were identified of which 19 fulfilled the inclusion criteria. Data extraction was done by at least two of the authors. Outcome was deep venous thrombosis and/or pulmonary embolism diagnosed by various methods. RESULTS: Any kind of heparin is better than no treatment or placebo (11 studies) with a Peto Odds ratio (POR) at 0.32 (95% CI 0.20-0.53). Unfractionated heparin and low molecular weight heparin (4 studies) were equally effective POR 1.01 (95% CI 0.67-1.52). The combination of graduated compression stockings and LMWH is better than LMWH alone (2 studies) with a POR at 4.17 (95% CI 1.37-12.70). CONCLUSION: The optimal thromboprophylaxis in colorectal surgery is the combination of graduated compression stockings and low-dose unfractionated heparin or low molecular weight heparin.

Anticoagulants↗
PubMed2005

[Digestive surgery and varicose vein surgery].

The thromboembolic risk related to surgery may be considered as low for varicose vein surgery and non major digestive surgery. It could be defined as moderate in case of large dissection, long duration of procedures and emergency cases. The risk may be considered as high for major abdominal surgery involving cancer surgery or not and bariatric surgery. The absence of prophylaxis can be proposed for low risk surgery (grade B). However, elastic compression stocking are effective for all cases of digestive surgery and suggested to be used (grade A). There are no data concerning the moderate risk situation. Therefore, experts recommend the use of elastic compression stockings or low doses of LMWH (grade D). High-risk surgery requires the use of high doses of LMWH recommended for reasons of efficacy, tolerance, and easiness to use (grade A). Associated elastic stockings is efficious (grade B). The duration of prophylaxis lasts generally 7-10 days. Extension to 1 month is recommended for major abdominal cancer surgery (grade A).

Ambulatory Surgical Procedures↗
PubMed1987

Hemodynamic assessment of high-compression hosiery in chronic venous disease.

Graded high-compression support hosiery have long been recognized as a physiologically significant mode of therapy for chronic venous disease because of their effects on the hemodynamics of venous return. Photoplethysmography (PPG) in the noninvasive vascular laboratory is now recognized as a quick, simple, and noninvasive measurement technique, which correlates well with ambulatory venous pressure in the postphlebitic limb with chronic venous insufficiency. The purpose of this study was to evaluate the hemodynamic effects, as measured by PPG, of 40 mm Hg graded compression support hosiery in the treatment of patients with a documented history of hospital-treated thrombophlebitis. Fifty lower extremities among 38 patients with a documented history of deep vein thrombosis and chronic venous insufficiency were matched against 50 control extremities among patients without disease. All 50 lower extremities in the study group had abnormal noninvasive venous studies, including Doppler ultrasound examination, phleborheography, and PPG (mean, 5.9. seconds). Thus these patients were ascertained to have incompetent deep venous systems, but with normal arterial flow as documented by ankle:brachial ratios. After application of 40 mm Hg gradient compression stockings to the study group, PPG measurements in all 50 limbs initially converted to normal (20.6 seconds). Abnormal PPG measurements were converted to normal in postphlebitic limbs with the application of graded compression stockings in the 29 patients who wore the prescribed hosiery; 21 patients did not wear the gradient stockings after the initial evaluation(s) and were not found to have improved PPG measurements. It can be concluded that such gradient stockings should be associated with a reduction in ambulatory venous pressure, which may, in turn, lead to clinical prevention or improvement of the various sequelae associated with chronic venous hypertension.

Adult↗
PubMed2002

[Air travel and venous thrombosis].

BACKGROUND AND METHODS: The paper reviews air travel and venous thrombosis. The risk of venous thrombosis increases with distance flown. The mechanisms that cause thrombosis are unknown, but may be related to hypobaric hypoxia, i.e. reduced air pressure inside the aeroplane, stasis of the lower limbs, often referred to as economy class syndrome (ECS), and dehydration. RESULTS: Symptomless deep venous thrombosis may occur in 10% of healthy long-haul airline travellers over 50 years of age, and up to 4.5% of passengers under 50 at high risk of thrombosis. Wearing of elastic compression stockings during the flight is associated with reduced risk of deep venous thrombosis. INTERPRETATION: Passengers should be encouraged to use the muscle-vein pump regularly, ensure adequate hydration, and in some cases wear elastic compression stockings. A majority of passengers will not need any thromboprophylaxis. Aspirin may have a protective role, but its efficacy in preventing venous thrombosis is much smaller than that of low molecular weight heparins. A high prophylactic dose of a low molecular weight heparin should be considered in passengers at high risk of thrombosis.

Aerospace Medicine↗
PubMed1999

Clinical benefits of lightweight compression: reduction of venous-related symptoms by ready-to-wear lightweight gradient compression hosiery.

BACKGROUND: Medical-grade compression of class I (20-30 mmHg) and class II (30-40 mmHg) have been shown to be beneficial against venous hypertension or congestion. Relatively few studies address the effects of ready-to-wear (RTW) lightweight gradient compression pantyhose on venous symptoms. OBJECTIVE: To perform a study comparing the effects of two different compression RTW lightweight gradient compression stockings (8-15 mmHg and 15-20 mmHg) on the venous symptoms of flight attendants. METHOD: A prospective crossover trial of symptom evaluation in 19 flight attendants was performed in which participants rated their symptoms on a visual analog scale. During the initial phase, participants wore no compression for 2 weeks. They then wore 8-15 mmHg and 15-20 mmHg gradient compression support hose while flying over a 4-week period. Symptoms before and after wearing the gradient compression stockings were compared and statistically analyzed. RESULTS: Wearing of 8-15 mmHg gradient hose resulted in statistically significant improvement of discomfort (P < 0.01). Swelling, fatigue, aching, and tightness of the leg were all improved to a statistically significant degree (P < 0.01). For 15-20 mmHg gradient hosiery, symptoms were improved to a statistically significant or almost significant level. The difference between the 8-15 mmHg and 15-20 mmHg compression was not statistically significant. CONCLUSIONS: Use of lightweight (low compression) RTW gradient compression hosiery is very effective in improving symptoms of discomfort (P < 0.01), swelling (almost P < 0. 05), fatigue (P < 0.05), aching (P < 0.01), as well as leg tightness. Improvement of symptoms is statistically significant compared to no compression when hosiery was worn regularly during waking hours for 4 weeks.

Adult↗
PubMed1998

[Deep venous thrombosis and severe burns].

Deep venous thrombosis (DVT) is a frequent and potentially serious complication in severely burned patients. We report the case of a burned patient (40% of total body surface burned), who had right femoral deep venous thrombosis and severe pulmonary embolism, although a prophylaxis was conducted with low molecular weight heparin, graduated compression stockings and rotating bed. This case shows that DVT early diagnosis and prophylaxis is difficult in severely burned patients. Systematic screening of DVT by duplex scan is possible only for femoral veins, which renders duplex scan more suitable for femoral catheter follow up than for systematic DVT screening. Computed tomography venography seems to be a valuable tool in the diagnosis of proximal thrombosis. Prophylaxis is best achieved with the use of preventive low molecular weight heparins, graduated compression stockings, and early mobilisation when possible. However, the place of low molecular weight heparins at high doses and external pneumatic calf compression needs to be evaluated by prospective studies.

Adult↗
PubMed2002

[Prevention of thromboembolic risk in spinal cord injury: results of a questionnaire concerning short- and long-term treatment].

INTRODUCTION: The use of medications to prevent thromboembolic risk is recommended in spinal cord injury patients during the early phase, but there is no consensus on treatment duration and modalities. Differences in practice include choice of medication (heparin, low molecular weight heparin, inhibitors of platelet aggregation), treatment duration (three to six months or more), and criteria for discontinuation of treatment. GOALS: To determine usual practice modalities for prophylaxis of deep vein thrombosis in spinal cord injury patients, and to identify determinant criteria. METHODS: Postal survey of physiatrists taking care of spinal cord injury patients. The questionnaire asks the physician about his usual practice modalities (choice of treatments, paraclinical tests, use of compressive stockings, during and after the first six months and criteria for discontinuation of treatments). RESULTS: Forty-two questionnaires were suitable for analysis. Results show that usual practice modalities combine venous doppler testing only in the setting of suggestive clinical signs, treatment with low molecular weight heparin during three to six months, and combination with compressive stockings. DISCUSSION: Despite the absence of consensus on this question, our results are consistent with data from the literature, which identify acute spinal cord lesions as a factor of high risk for deep vein thrombosis. The risk decreases during the chronic phase. Adjuvant techniques include mobilisation, elastic compression, and standing. A study of long-term treatment modalities after deep vein thrombosis would be needed.

Bandages↗
PubMed1996

The effect of thigh-length support stockings on the hemodynamic response to ambulation in pregnancy.

OBJECTIVE: Our purpose was to determine the effect of thigh-length support stockings on hemodynamic response when pregnant subjects change from the sitting to the lateral recumbent position and then after standing with ambulation. STUDY DESIGN: Eighteen subjects in the late second and early third trimester of pregnancy acted as their own controls. The cardiovascular status of the subjects was assessed by a noninvasive technique--thoracic electrical bioimpedance before and after wearing support stockings for 1 week. Urine catecholamines were measured in 13 patients before and after wearing support stocking to assess the release of catecholamines. Samples were collected after the subjects had been in the lateral recumbent position 40 minutes and again 40 minutes later after standing with ambulation. RESULTS: Heart rate and mean arterial blood pressure decreased significantly when subjects changed from the sitting to the lateral recumbent position and then increased with ambulation. Wearing compression stockings significantly increased mean arterial pressure and afterload in all three positions. Position change from lateral recumbent to standing and ambulation marginally increased urinary dopamine levels (p = 0.097) and significantly increased norepinephrine levels (p = 0.006). CONCLUSIONS: There are significant hemodynamic changes in pregnant subjects when they change from the sitting position to the lateral recumbent position and then change to standing with ambulation. Support stocking have a significant mechanical effect: they significantly increase afterload and systemic vascular resistance by preventing pooling of blood in the lower extremities. There may also be a biochemical effect that results in less catecholamine release. These results suggest that compression stockings could play an important role in supporting the circulation during ambulation.

Adult↗
PubMed2005

Venous thromboembolic complications following air travel: what's the quantitative risk? A literature review.

OBJECTIVES: To quantify the risk of venous thromboembolism (VTE) following air travel and assess methods of prevention. DESIGN: Review of literature. METHODS: We reviewed Pubmed, Medline, Embase and Cochrane Databases for studies that have assessed the risk of VTE associated with air travel. RESULTS: There is an association of VTE with air travel with pooled odds ratio of 1.59 (confidence interval 1.04-2.43) from three case control studies and relative risk of 2.93 (confidence interval 1.5-5.58) from two controlled cohort studies. The incidence of symptomatic pulmonary embolism (PE) is extremely low but there is substantial increase when the distance travelled is more than 5,000 miles (1.5 PE per million passengers) or time of flight is more than 8h duration (2.57 PE per million passengers). The quantitative risk of lower limb venous thrombosis in high-risk subjects is 5% per flight and 1.6% per flight for low risk subjects following long haul flights. All six randomised trials to test the below knee compression stockings with ankle pressures of 14-30 mmHg have shown reduction in lower limb venous thrombosis. CONCLUSION: VTE is more common in those with additional risk factors when the risk is about 5% per air travel for long haul flights. Class I or II below knee compression stockings are effective in the prevention of lower limb venous thrombosis.

Aerospace Medicine↗
PubMed2006

The post-thrombotic syndrome: the forgotten morbidity of deep venous thrombosis.

The postthrombotic syndrome (PTS) is the most common complication of deep venous thrombosis (DVT) yet has received little attention from clinicians and researchers. Clinically, PTS is characterized by chronic pain, swelling, heaviness and other signs in the affected limb. In severe cases, venous ulcers may develop. PTS is burdensome and costly to patients and society because of its high prevalence, severity and chronicity. Preventing DVT with the use of effective thromboprophylaxis in high-risk patients and settings and minimizing the risk of ipsilateral DVT recurrence are likely to reduce the frequency of PTS. Compression stockings worn daily after DVT appear to reduce the incidence and severity of PTS but questions regarding their use and effectiveness remain. Future research should focus on identifying patients at high risk for PTS, assessing the role of thrombolysis in preventing PTS and evaluating the optimal use of compression stockings in preventing and treating PTS. In addition, new therapies to treat PTS should be sought and evaluated.

Humans↗