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Biomedical subjects

P C Lam

Publications and source records attributed to P C Lam.

4 recordsLinked to original sources

Urolume prostatic stents for urinary retention due to benign prostatic hyperplasia in patients with high medical risks.

A retrospective study was conducted to evaluate the efficacy of using urolume prostatic stents in patients who have developed urinary retention due to benign prostatic hyperplasia but who are medically unfit for conventional transurethral resection of the prostate. From April 1995 through May 1996, 12 patients were studied (mean age, 80 years; range, 72-92 years). Pre-operative assessment pointed to major risk due to an underlying medical condition. Flexible cystoscopy and video-urodynamcis were performed to assess the detrusor function and to ascertain if prostatic obstruction was the cause of retention. After insertion of the prostatic stent, 11 patients managed to void on recovery from the anaesthesia and remained catheter-free during a mean follow up period of seven months (range, 2-18 months). There was no operative morbidity or mortality. Urolume prostatic stents represent a viable option for elderly patients with significant medical risks who have urinary retention. Pre-operative urodynamics are essential to identify appropriate candidates.

Journal Article↗

Calcification in oligodendroglioma.

Forty-four previously diagnosed surgical biopsy specimens of oligodendroglioma with calcification from the file of Veterans General Hospital-Taipei between 1977-1985 form the base of this study. Thirty-two patients (72.8%) had varied degree of calcification deposits in tumor parenchyma related to blood vessels while 12 patients (27.2%) in tumor parenchyma unrelated to blood vessels. Ten patients (22.7%) disclosed calcification at the vicinity of tumor tissue. Histochemical studies of the calcified deposits revealed no trace minerals other than calcium and iron. Electron microscopic examination of the calculi showed membrane-bound vesicles and radially precipitated crystals that simulated hydroxyapatite of psammoma body in meningioma. There was no statistically significant correlation between the demise or recurrence of patients and the calcification of tumor when Chi-squared test was applied.

Brain Neoplasms↗

Venous outflow of the hormones secreted by the rat pituitary autotransplanted beneath the kidney capsule.

In adult female or male rats subjected to hypophysectomy and autotransplantation of the pituitary beneath the renal capsule, the levels of prolactin in the renal vein of the pituitary-bearing kidney were not significantly different from those found either in the renal vein of the contralateral kidney or in the jugular veing. LH levels were slightly but highly significantly higher than those found in hypophysectomized rats; the levels found in the two renal veins and the jugular vein were also not sigificantly different from one another.

Animals↗