Hemodynamics of erection in the monkey.

Being able to induce controlled erection in dogs and monkeys, we investigated the hemodynamics and mechanism of penile erection. 'Chronic' monkey models, having had electrodes implanted around the cavernous nerves for electroerection, were studied to evaluate the details of the hemodynamic changes. The studies included: 1) arterial blood flow, 2) corporeal pressure, 3) blood gases, 4) venous flow and 5) radiography.

Incidence of radiographically evident bone disease, nephrocalcinosis, and nephrolithiasis in various types of renal tubular acidosis.

The syndrome of renal tubular acidosis has been categorized into three physiologic types that have different clinical findings and prognostic and therapeutic implications. We reviewed radiographs of the skeleton and kidneys in 92 patients (56 children and 36 adults) with renal tubular acidosis in order to determine whether the radiologic findings could be related to the type of syndrome. Forty-four patients had Type 1 renal tubular acidosis, 18 had Type 2, and 30 had Type 4.

Segmental kidney resection in children with small, hypertension-producing intrarenal vascular lesions.

Renal angiography is indispensable in the study of children with suspected renal hypertension. Main or segmental renal artery stenoses are usually well-demonstrated by midstream abdominal aortography, but small intrarenal vascular abnormalities can be easily overlooked when such a nonselective method is used. Such tiny abnormalities, however, can be the cause for, or indication of focally increased renin production and consequent hypertension.