Richard Welk

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Methods of "tattooing" the colon endoscopically were evaluated in a series of studies on dogs. Injections were performed through a sigmoidoscope using a 25-gauge sclerotherapy needle. The first phase showed excellent staining with methylene blue; however, after 24 hours the stain had completely diffused and was no longer visible. In the second phase, eight(More)
HYPOTHESIS A systemic disease-free state necessitates a local disease-free state. This cannot be accomplished without a properly performed resection by an experienced surgical team. Successful local management of soft tissue sarcoma (STS) may lead to improved disease-free survival. An STS treatment protocol using wide local excision followed by radiation(More)
This study was undertaken to determine the success of surgical treatment of advanced secondary (renal) hyperparathyroidism. From 1978 to 1985, total parathyroidectomy and autotransplantation (TPA) were performed for secondary hyperparathyroidism in 23 patients who had had dialysis for a mean of 6.5 years preoperatively. Indications for surgery included(More)
The acute transplantation of a normal kidney into a recipient rat with Goldblatt one-kidney, one clip hypertension (1K1C) results in a blood pressure (BP) fall toward but not below normal levels within 1 hour. Removal of the clip in a 1K1C hypertensive rat also normalizes the BP rapidly. These changes are not mediated by external fluid loss and occur after(More)
Commercial airlines face an extremely challenging operating and competitive environment. To remain in business they must comply with ever-changing regulatory requirements while, at the same time, minimizing their operational costs without sacrificing customer expectations of service levels. Increasingly, airlines are realizing that a “plan-execute” mode of(More)
Dorsal digital burn contractures cause unsightly eponychial retraction and proximal nail exposure. These areas are subject to breakdown with minor trauma. These deformities are often ignored as trivial. Many surgeons are unaware that simple reconstruction is possible. Correction is a worthwhile undertaking. This report illustrates a new modification:(More)
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