9/4/2023 0 Comments Leg ultrasound for dvtPure compression technique for DVT had a poor sensitivity of 43% (95% CI = 39%–48%), pure color/doppler technique for DVT had a pooled sensitivity of 58% (95% CI = 53%–63%), compression and color/doppler technique for DVT had a pooled sensitivity of 61% (95% CI = 48%–74%). Using venography as the gold standard, US for proximal DVT had a pooled sensitivity of 59% (95% confidence interval (CI) = 51%–66%) and a pooled specificity of 98% (95% CI = 97%–98%), US for distal DVT had a poor sensitivity of 43% (95% CI = 38%–48%) and a pooled specificity of 95% (95% CI = 94%–96%), US for whole-leg DVT had a pooled sensitivity of 59% (95% CI = 54%–64%) and a pooled specificity of 95% (95% CI = 94%–96%), US for post-major orthopedic surgery patients had a pooled sensitivity of 52% (95% CI = 49%–55%), and US for other types of patients had a pooled sensitivity of 58% (95% CI = 43%–72%). The meta-analysis included 26 articles containing 41 individual studies with a total of 3951 patients without symptoms of DVT. The study quality and the risk of bias were evaluated using QUADAS-2, with heterogeneity was assessed and quantified by the Q score and I 2 statistics, respectively. There were 4 different classes of subgroup analysis-the class of patients stratified by location of US exam (proximal, distal, whole leg), the class stratified by technique (color/doppler, compression, both modalities), the class stratified by kind of surgery (orthopedic, otherwise hospitalized) and the class stratified by era of publishing (1980s, 1990s, 2000s). A meta-analysis was performed using Meta-DiSc (version 1.4), providing the pooled sensitivity, specificity, positive (LR+) and negative (LR–) likelihood ratios of the detection accuracy of US. Full-text reports on prospective diagnostic studies involve the detection of lower-limb proximal and distal DVT in patients without symptoms of DVT using US and venography. The sonographer will notify the referring doctor with the results and you will be advised to see our specialist or your referring doctor after the test.The research team performed a systematic search in PubMed, Ovid, Cochrane, and Web of Science without language or date restrictions. If the sonographer detects a DVT, then you may require immediate treatment. The sonographer will scan you from the groin to the ankle (even though you have pain in the calf). The gel is easily washed off and does not stain clothes. Assessing for deep venous thrombosis using duplex ultrasound is the same non-invasive test as for arterial and other venous ultrasound scans.Ī water-soluble ultrasound gel is applied to the legs and a probe is run along the skin during the examination. You will be asked to remove some clothing to allow easy access to the area to be examined and you may be required to change into a gown. It is advisable to wear comfortable clothing for all venous ultrasound. However, a vein with thrombus within it is solid and cannot be compressed. Veins have thin walls so a normal vein can easily be squashed, and this appears as a “kissing” of the vein as it is pressed. When duplex ultrasound is used to scan for a deep vein thrombosis (DVT) or thrombosis of the superficial veins (superficial thrombophlebitis) the ultrasound is used to check that the veins can be “squashed” by putting light pressure on them with the probe. Venous ultrasound is used to detect blood clots), especially in the main veins of the leg – a condition often referred to as deep vein thrombosis. Assessment for Deep and/or Superficial Thrombosis
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