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Biomedical subjects

G Zamora

Publications and source records attributed to G Zamora.

14 recordsLinked to original sources

The development and implementation of a quality assurance Master Audit Plan.

As a quality assurance (QA) department for a clinical research organization, QA conducts audit activities for clinical trials managed by our organization and acts as an independent QA group for several other companies. A quality assurance/regulatory compliance Master Audit Plan is developed for each study or each audit if the audit is an independent task. The Master Audit Plan designed for a specific clinical study consists of a combination of several QA activities designed to ensure quality and regulatory compliance, to define timelines, and to identify personnel. These activities may include the review of the regulatory documents for each investigative site prior to the shipping of test article (test article release), review of informed consent, review of internal sponsor study files, and clinical site audits. Results of audit activities conducted under the Master Audit Plan for several clinical studies have been compiled for three of the major QA tasks. These include test article release, informed consent review, and site audits. A review of regulatory document files for test article release indicated that 13% required additional documents or correction of submitted documents. A review of informed consents found that 32% required revision. Site audit activities indicated that the clinical sites were, in general, adhering to Federal regulations and GCP guidelines. Observations noted at sites tended to fall into the categories of test article accountability issues, regulatory document additions or revisions, and quality control issues.

Facility Regulation and Control↗

Single blind study to evaluate the efficacy and safety of naproxen gel compared with diclophenac emulgel in the treatment of soft tissue injuries.

Sixty four adult patients of both genders with injuries such as contusions and sprains were studied. Of these, 34 were treated with 10% naproxen gel and 30 with 1% dichlophenaco gel topically given for 4 days. Various pain modalities, edema and functional alterations of areas involved were studied. Naproxen reduced spontaneous pain slightly better than dichlophenaco. Both drugs resulted in significant reduction of other pain modalities, edema and functional alterations (p < 0.001). A lower percentage (29%) of naproxen patients used paracetamol as additional pain reliever compared to dichlophenaco patients (36%). Local adverse events were minimum for both groups.

Adult↗

Serum lipid levels before and after vasectomy in men.

The blood lipid profile was determined in sixty-two men, 24 to 62 years old, before and two, six and twelve months after surgical occlusion of the vas deferens. No statistically significant differences were found in mean body weight, blood pressure, serum levels of non-esterified fatty acids, total lipids, triglycerides, total cholesterol and alpha, beta and prebeta fractions of the lipoproteins, which were measured before and after surgery. When the serum levels of the alpha and beta fractions were considered in the same subject, it was observed that 12 months after vasectomy a similar percentage of cases showed a predominance of either one of them. Hence, no modifications on the lipid profile of these subjects were found that could indicate an increased risk of arteriosclerotic disease.

Adult↗

Polyurethane contraceptive vaginal sponge: product modifications resulting from user experience.

A preliminary study of a new contraceptive vaginal sponge containing the spermicide nonoxynol -9 (N-9), was undertaken to assess acceptability of the method among a group of sexually active volunteers in Mexico City. Numerous modifications of the product and its packaging resulted from user experience and feedback to the physicians and bioengineers conducting the study. Although determining efficacy of the sponge was not an objective, it quickly became clear that spermicide is a crucial component of the intravaginal sponge contraceptive system; a high incidence of pregnancies led us to increase the spermicide level from 10% to 20%, then to the current 30% of dry sponge weight, or about 1.0 gram per sponge. (It should be noted that the high pregnancy rates were consistent with our experience using other vaginal contraceptive methods in the same clinic population). This initial evaluation of the contraceptive sponge has resulted in significant modification which should increase its acceptability to a small but important group of contracepting women. The sponge is currently being evaluated by the International Fertility Research Program (IFRP) in multicentered comparative clinical trials to determine use-effectiveness and acceptability in various cultures.

Clinical Trials as Topic↗

[Computerized tomography of craniopharyngiomas. Therapeutic consequences].

An analysis was made of the results of C.T. scanning in 43 patients with craniopharyngiomas. Filling of the suprasellar cisternae was observed in most cases, together with dilatation of the lateral ventricles. The appearances of the tumor before and after intravenous injection of the contrast medium are described and the frequency with wich calcification, cysts, and lipid densities were noted is reported. Regular C.T. scanning can define operative indications for craniopharyngiomas as a function of the results obtained.

Calcinosis↗

[Determination of fructose, proteins, oxalacetic and pyruvic transaminase in the seminal plasma of vasectomized patients].

Measurement of concentrations of fructose, proteins, oxalacetic and pyruvic transaminases in seminal plasma were performed in a group of 20 normal males, 30 to 40 years old, subjected to vasectomy. There were no statistically significant differences among the values obtained before and 6 months after the vasectomy. In consecuence it is concluded that bilateral occlusion of the vas deferens do not modify the androgenic function of the testis, and that certain enzymes like glutamic oxalacetic and pyruvic transminases are not incorporated to the semen by the testis but rather by the prostate and/or by the seminal vesicles.

Adult↗