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Biomedical subjects

C P Hess

Publications and source records attributed to C P Hess.

4 recordsLinked to original sources

A software system for interactive MR signal processing.

This paper describes a new software platform called "V" which is designed for interactive processing of magnetic resonance data. The package currently contains a variety of functions for image reconstruction and spectral data analysis. More importantly, it provides a framework to facilitate the exchange and application of processing algorithms among researchers in the field. We discuss the architecture of the package, give an example to demonstrate its operation and provide instructions for obtaining the software.

Algorithms

Dialysate dumping: a novel cause of inadequate dialysis in continuous ambulatory peritoneal dialysis (CAPD) patients.

Inadequate control of serum chemistries and extracellular fluid volume may result in patients being changed from continuous ambulatory peritoneal dialysis (CAPD) to another form of dialysis. We report 2 patients in whom apparent inadequacy of CAPD resulted from dialysate dumping. The first patient could not control her fluid intake and required frequent hypertonic exchanges. She felt too full with these exchanges and drained a substantial portion of each exchange 30 to 60 min after infusion. Patient 2 had similar complaints but simply drained a large portion of each fresh bag directly into the drain bag at the start of the flush-before-fill step. Both patients had improved results from CAPD once they stopped their dialysate dumping. Partial wasting of each exchange because of abdominal discomfort should be added to the causes of inadequate dialysis in CAPD.

Adult

Atrial natriuretic peptide (ANP) is removed by peritoneal dialysis in humans.

Atrial natriuretic peptide (ANP) is a hormone liberated from the heart during atrial stretch (volume overload). In order to determine if ANP levels are altered in patients on continuous ambulatory peritoneal dialysis (CAPD) or affected by the dialysis procedure itself, we measured plasma ANP in patients before and after peritoneal infusion of two liters of 1.5% Dianeal dialysate and in dialysate subsequently drained from these patients. Plasma ANP is elevated in CAPD patients, but is not affected by infusion of dialysate. ANP is cleared from plasma by peritoneal dialysis.

Adult