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Biomedical subjects

W C Waters

Publications and source records attributed to W C Waters.

At least 19 recordsLinked to original sources
PubMed1999

Postoperative pulmonary edema.

BACKGROUND: Noncardiogenic pulmonary edema may be caused by upper airway obstruction due to laryngospasm after general anesthesia. This syndrome of "negative pressure pulmonary edema" is apparently well known among anesthesiologists but not by other medical specialists. METHODS: We reviewed the cases of seven patients who had acute pulmonary edema postoperatively. RESULTS: There was no evidence of fluid overload or occult cardiac disease, but upper airway obstruction was the most common etiology. Each patient responded quickly to therapy without complications. CONCLUSIONS: Of the seven patients with noncardiogenic postoperative pulmonary edema, at least three cases were associated with documented laryngospasm causing upper airway obstruction. This phenomenon has been reported infrequently in the medical literature and may be underdiagnosed. Immediate recognition and treatment of this syndrome are important. The prognosis for complete recovery is excellent.

Acute Disease↗
PubMed1982

Hypocitraturia in calcium nephrolithiasis.

Several investigators have reported that hypocitraturia is frequent in patients with idiopathic kidney stones. In these studies, however, glomerular filtration rate, urinary tract infection, sex, diet, time of day, and medications, all potentially influential variables, were uncontrolled. Fifteen men, aged 30-52 yr, with recurrent idiopathic calcium oxalate stones and 15 normal age-matched men were studied. Patients with hyperparathyroidism, renal tubular acidosis, reduced creatinine clearance (less than 80 ml . min/1.73 M2), or urinary infection were excluded. Medications were stopped 2 weeks before the study began. A standard constant diet, furnishing 800 mg calcium and free of citrate, was fed for 20 days. During the last 10 days, 4.5 g sodium citrate were given orally. Eight-hour collections of urine were analyzed for calcium and citrate. Filtered load and net tubular reabsorption of citrate were also calculated. The 24-h urinary excretion of calcium was elevated in eight stone formers, and citrate excretion was depressed in seven. Five patients were both hypercalciuric anc hypocitraturic. The hypocitraturia resulted from excessive net tubular reabsorption of a normal filtered load of citrate. Urinary citrate was highest between 0800-1600 h, whereas calcium was highest between 1600-2400 h; both components were lowest between 2400-0800 h. The diurnal profiles of urinary calcium and citrate were similar in the stone formers and in the normal men. Oral sodium citrate did not influence urinary citrate in either group. These data suggest that in adult men, hypocitraturia may be a common predisposing factor for calcific nephrolithiasis.

Adult↗
PubMed1979

The basilic vein fistula for vascular access.

The basilic vein fistula provides reliable vascular access for chronic hemodialysis therapy. Early morbidity includes edema and mild pain. Ischemic complications have not developed in this series. Patency has been excellent in the initial period and no patient has yet developed infection, aneurysm or venous fibrosis, although longer follow-up is necessary. The use of the autogenous basilic vein fistula in patients unsuited for forearm arteriovenous fistulae is supported by these results. Long-term results which would support continued use of this modality would include an expected lower incidence of infection due to the absence of a foreign body and the inherent healing property of viable tissue, and improved long-term patency attributable to the absence of a venous anastomosis.

Adult↗