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Biomedical subjects

M L Robinson

Publications and source records attributed to M L Robinson.

At least 163 records · Page 9Linked to original sources
PubMed1988

Transgastric percutaneous drainage of pancreatic pseudocysts.

Transgastric pancreatic pseudocyst drainage provides unique advantages that mimic the benefits of surgical cystogastrostomy while avoiding the disadvantages of external drainage. This procedure was performed under CT guidance in eight patients with pancreatic pseudocysts. There was no communication with the pancreatic duct at the time of initial aspiration. Communication was later demonstrated in six of eight patients and persisted for the entire duration of drainage. Resolution of the cysts occurred in seven of the eight patients. In one patient an infection of the pancreatic collection developed that required surgery. As with abdominal abscess drainage, a preexisting fistula may be opacified only after several days of catheter drainage and cannot be predicted at the time of initial aspiration. The percutaneous transgastric approach mimics the surgical approach and allows a mature tract to form from the cyst to the stomach. This eliminates the risk of a pancreaticocutaneous fistula and permits tube removal within a reasonable period of time.

Adult↗
PubMed1988

Diagnostic criteria for carotid duplex sonography.

Optimal criteria for the duplex sonographic diagnosis of carotid artery stenosis have not yet been defined. We studied 205 vessels in 105 patients with both duplex sonography and angiography. Four diagnostic groups were defined on the basis of Doppler flow characteristics. Receiver-operating-characteristic curves were used to compare diagnostic criteria at significant stenosis levels, and to select threshold values that emphasize specificity as well as sensitivity. Peak systolic velocity, systolic velocity ratios, and end-diastolic velocity were all shown to be equivalent predictors of significant disease. We chose peak systolic velocity in the internal carotid artery as our best parameter because of its ease of measurement. The use of combined parameters offered no significant statistical advantage over the use of a single parameter. The real-time assessment of stenosis and ulceration was not found to be reliable. ROC curves should be used to select Doppler criteria with desired sensitivities and specificities to maximize the benefit in each clinical setting.

Angiography↗