Shock-wave lithotripsy for the removal of kidney stones.
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Humans↗
Biomedical subjects
A D Jenkins
Publications and source records attributed to A D Jenkins.
The effect of spironolactone on the elemental composition of the intraluminal fluids of the seminiferous tubules, rete testis and epididymis of the rat.
Embryologically, the epididymis and renal collecting tubules develop from the mesonephric duct. Aldosterone enhances the reabsorption of sodium from the collecting tubule, and there is evidence that sodium is removed from the epididymal lumen against a concentration gradient. Rats were treated with spironolactone, an aldosterone antagonist, and the concentrations of seven elements, including sodium, were measured in intraluminal fluids from the testis and epididymis. The sodium concentration in caput epididymidal fluid rose (102.5 +/- 4.4 to 128.0 +/- 6.8 mmol./l., p less than 0.01) after 14 days of spironolactone treatment. This finding is consistent with the hypothesis that aldosterone acts on the caput epididymidis, like the collecting tubule, to augment the removal of sodium from luminal fluid.
Animals↗
The effects of cyproterone acetate on the elements in the intraluminal fluids of the testis and epididymis of the rat.
Spermatozoal maturation and the integrity of the epididymis are dependent on the action of androgen. Micropuncture techniques and electron probe microanalysis were used to investigate the effect of cyproterone acetate on the concentrations of seven elements in intraluminal fluids of the testis, rete testis, and epididymis. After 4 weeks of treatment with cyproterone acetate, the sodium concentration rose in the corpus epididymidis (74.4 +/- 5.4 to 102 +/- 6 mmol/L, p less than 0.01). The concentration of potassium rose in seminiferous tubular fluid (33.9 +/- 2.7 to 49.4 +/- 4.4 mmol/L, p less than 0.01) and caput epididymidal fluid (15.9 +/- 1.4 to 25.7 +/- 0.9 mmol/L, p less than 0.01) after 8 weeks of cyproterone acetate treatment. The chloride concentration rose in the caput (23.7 +/- 0.8 to 65.4 +/- 12.5 mmol/L, p less than 0.01) and distal cauda (39.4 +/- 4.6 to 74.7 +/- 10.8 mmol/L, p less than 0.01) epididymidis after 8 weeks of treatment. Cyproterone acetate had no effect on the concentrations of phosphorus, calcium, and magnesium. The sulfur concentration rose in seminiferous tubular fluid (4.3 +/- 0.3 to 7.3 +/- 0.3 mmol/L, p less than 0.01) and distal cauda fluid (5.3 +/- 0.5 to 14.0 +/- 1.6 mmol/L, p less than 0.01) after 8 weeks of treatment with cyproterone acetate. Four weeks of treatment also increased the sulfur concentration in the distal cauda (6.8 +/- 1.6 to 13.4 +/- 1.5 mmol/L, p less than 0.01). Cyproterone acetate treatment did not affect the concentration of any element in rete testis fluid or serum.
Animals↗
Optimal blood use in genitourinary surgery.
The most commonly performed urologic surgical procedure is transurethral resection of the prostate. We reviewed the crossmatching and transfusion records of 226 patients who had undergone transurethral prostatectomy at our hospital from 1977 through 1979. Only 13 patients (5.8 per cent) received a transfusion. The crossmatched-to-transfused ratio was 21.5. Preoperative ABO-Rh typing and antibody screen are safe and cost-effective alternatives to preoperative crossmatching of blood for uncomplicated transurethral prostatectomy.
Blood Grouping and Crossmatching↗
Percutaneous transrenal placement of indwelling ureteral catheters.
Indwelling ureteral catheters can be used for long-term drainage of the upper urinary tract in the management of distal ureteral obstruction. Ureteral catheters cannot always be passed cystoscopically in a retrograde manner. However, it may be possible to place an indwelling ureteral catheter through a percutaneous nephrostomy in an antegrade fashion. This technique and exemplary patients are discussed.
Aged↗
Concentrations of seven elements in the intraluminal fluids of the rat seminiferous tubules, rate testis, and epididymis.
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Animals↗
Physiology of the male reproductive system.
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Adolescent↗
Synthesis of oligosaccharides on polymer supports. I. 6-O-(p-vinylbenzoyl) derivatives of glucopyranose and their copolymers with styrene.
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Benzyl Compounds↗
Activated protein C resistance and lupus anticoagulant in pregnancy.
Thrombophilias, both inherited and acquired, have been reported to be associated with thromboembolic events and severe obstetric complications. This case report examines the case of a patient with two thrombophilias, activated protein C resistance secondary to Factor V Leiden mutation and lupus anticoagulant.
Activated Protein C Resistance↗
The effect of estrogen administration in vivo on the elemental composition of the intraluminal fluids of the seminiferous tubules, rete testis, and epididymis of the rat.
The maturation of spermatozoa in the epididymis is dependent upon the presence of androgens. This study examined the effects of androgen suppression by estradiol valerate on the elemental composition of the intraluminal fluids of the testis and epididymis. In the fluid from the caput epididymidis, the concentrations of sodium (106.1 +/- 3.4 to 182.8 +/- 16.9 mmol/1, P less than 0.01) and chloride (16.5 +/- 2.2 to 79.3 +/- 10.8 mmol/1, P less than 0.01) rose after treatment with estradiol valerate. By contrast, this treatment reduced the concentrations of phosphorus (63.7 +/- 1.6 to 47.8 +/- 3.2 mmol/1, P less than 0.01), sulfur (18.4 +/- 1.0 to 10.8 +/- 1.0 mmol/1, P less than 0.01), calcium (0.93 +/- 0.09 to 0.50 +/- 0.07 mmol/1, P less than 0.01), and magnesium (2.21 +/- 0.41 to 0.76 +/- 0.16 mmol/1, P less than 0.01). In the distal cauda epididymidis, the concentration of chloride rose after treatment with estradiol valerate (24.4 +/- 1.7 to 54.9 +/- 3.9 mmol/1, P less than 0.01), but the concentrations of the other measured elements (sodium, potassium, phosphorus, calcium, magnesium, and sulfur) were not altered by estrogen treatment. In rete testis fluid the concentration of phosphorus fell (2.00 +/- 0.30 to 0.67 +/- 0.12 mmol/1, P less than 0.01), while that of calcium rose (0.66 +/- 0.15 to 1.55 +/- 0.21 mmol/1, P less than 0.01). Estrogen treatment did not appear to affect the elemental composition of seminiferous tubular fluid or serum. Therefore, estradiol valerate had a marked impact on the elemental composition of luminal fluid only in the caput epididymidis--where sperm maturation is initiated--and a minor effect on that of cauda epididymidal fluid--in which mature spermatozoa are stored.
Animals↗
Interventional uroradiologic procedures performed using gadodiamide as an alternative to iodinated contrast material.
Three patients with either a history of severe allergic reactions to iodinated contrast or marked renal insufficiency underwent interventional uroradiologic procedures using full-strength gadodiamide (Gd) as a contrast agent in place of iodinated contrast material. The procedures were percutaneous access for nephrostolithotomy, antegrade pyelography with placement of a nephroureteral stent, and a diagnostic nephrostogram with exchange of a nephroureteral stent. Gd was visualized fluoroscopically and produced satisfactory digital radiographs without allergic reaction or worsening renal function. Gd can be useful in guiding interventional uroradiologic procedures when iodinated contrast material is contraindicated.
Contrast Media↗