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Biomedical subjects

C F Slabber

Publications and source records attributed to C F Slabber.

At least 19 recordsLinked to original sources

Sperm antibodies in men with oligozoospermia and azoospermia.

Spermatozoal antibodies found in the sera of oligozoospermic and azoospermic men are often related to infertility or subfertility. In this study the sera of 36 such men were examined for the presence of sperm antibodies. During the routine analysis of the semen, note was taken of the type and degree of agglutination in the ejaculates. The semen and serum of 15 normozoospermic men were used as controls. The gelatin agglutination, micro-agglutination and tube-slide agglutination tests were compared. A correlation between the state of fertility and the presence of sperm antibodies was found. The presence of sperm antibodies is more likely to be a corollary than a cause of oligozoospermia or azoospermia.

Antibodies

Blood bupivacaine levels in standard and segmental epidural blockade in obstetrics.

A statistically significant reduction in maternal blood bupivacaine levels could be achieved by using a segmental epidural blockade and lower concentrations of bupivacaine. Since bupivacaine has certain potential disadvantages for the mother and the fetus, its dosage should be kept as low as possible. Significantly lower blood levels without loss of analgesic quality are obtainable by using segmental epidural blockade and a lower concentration of bupivacaine.

Anesthesia, Caudal

The position of epidural catheters in obstetric regional anaesthesia.

The fate of plastic catheters threaded into the epidural space was studied radiographically in a total of 125 catheters in 75 patients. The longer the segment of catheter, the less likely it is to reach the intended position, because it may curl up or become deflected. The most reliable technique for accurately placing an epidural catheter at any specific level is to enter the epidural space as close as possible to that level, so that the catheter does not need to be threaded for more than 2--3 cm.

Anesthesia, Caudal

The Friberg spermagglutination test--a modification.

In our laboratory we encountered problems interpreting the standard Friberg test. After an incubation period of four hours we could not interpret the test in 52 per cent of cases due to a high number of immobile spermatozoa and debris in the supernatant used as antigen in this test. By shortening the incubation period to two hours we could objectively interpret 76 per cent of cases. The applicability of the test was further improved by modifying the preparation of the antigen. Instead of using the supernatant of diluted semen, we "filtered" the motile sperm by means of the sperm penetration meter of Kremer. The capillary tube of the penetration meter was filled with virgin serum and incubated for one hour. After a four hour incubation this test could be applied in 80 per cent of cases, and after a two hour incubation period in all the cases. The reliability of this test was compared with the standard Friberg, the Kibrick and the Franklin-Dukes tests. The modifications did not alter the reliability of the test.

Agglutination Tests

Experimental findings with spermantibodies: condom therapy (a case report).

A couple with no demonstrable cause for their infertility, except for a pronounced antisperm activity in the blood serum of the female partner, were instructed to use a condom while our laboratory monitored the wifes antibody titer. The antibody activity declined sufficiently and an artificial husband insemination were performed after seven months of therapy. A precise report of the spermantibody activity over an eleven month period are given by the authors.

Antibodies

Forward progression of spermatozoa. Standardization of results.

The principal aim of this study was to determine whether subjective estimations of sperm velocity in our laboratory could readily be translated into objective figures. The technique for measuring the progression of human spermatozoa in seminal plasma in objective fashion was the one used by Janick and MacLeod in 1970. We therefore compared our objective figures with those of these authors and found a remarkable correlation between their values and ours. However, we went a step further and standardized the different objective values found in the study. Three simple equations were determined, by means of which each laboratory will be able to standardize their subject scale for forward progression of the spermatozoa.

Humans

Hypotension after lumbar epidural analgesia.

Despite preloading with fluid, a fall in the mean arterial pressure was recorded in 66% of patients after standard epidural analgesia. In 83% of patients in whom blood pressure fell, hypotension was classified as moderate or severe. In cases of severe hypotension the dermatome level of the block always surpassed T9. The maximal fall in blood pressure always occurred within the first 25 minutes after administration of the local anaesthetic agent.

Anesthesia, Epidural

The quantitative effect of lumbar analgesia on uterine work output.

The effect of lumbar epidural analgesia on uterine work output was studied in 36 women during labour. During the first 10 minutes after administration of the local anaesthetic agents there was a 46% loss of uterine activity. In 72% of patients uterine activity returned to normal within 30 minutes. Seventeen per cent of patients required additional oxytocic stimulation.

Anesthesia, Epidural

Failure of pyridoxine to suppress raised serum prolactin levels.

Pyridoxine has been reported as having an antilactogenic effect, presumably by suppressing prolactin secretion. We have measured serum prolactin levels during pyridoxine administration in two groups of hyperprolactinaemic subjects. In normal postpartum women, the postdelivery fall in serum prolactin levels did not differ significantly in treated and control subjects. In patients with chlorpromazine-induced hyperprolactinaemia and galactorrhoea, pyridoxine did not reduce the elevated levels. In neither group was milk production suppressed.

Chlorpromazine

[Obstetrics and gynecology in the undergraduate medical curriculum].

In the present situation where medical curricula are being re-examined by many medical faculties, the importance of obstetrics and gynaecology in the undergraduate curriculum has come under intense scrutiny. Obstetrics and gynaecology form a major part of the general practitioner's work, and should therefore form a major part of his medical training. The subject also stresses par excellence the importance of communication with patients, preventive medicine and special responsibility of the medical practitioner to the community. Every department of obstetrics and gynaecology must examine the contents of the course presented to its students. We must move away from the old mechanistic approach and concentrate on those aspects which are important in a modern society--antenatal and postnatal care, preventive measures, family planning, and sexual and psychological problems of our patients.

Curriculum

Verrucous carcinoma of the vulva.

A patient with verrucous carcinoma of the vulva is presented. A radical vulvectomy and superficial inguinal lymphadenectomy was done. The short-term result was satisfactory.

Aged

The effect of lumbar epidural analgesia on the fetal heart.

Fetal heart rate was monitored by continuous cardiotocography in 67 patients who were subjected to standard epidural block. In 43% of cases a deterioration in the fetal heart rate pattern was observed. The abnormal heart rate usually responded to conservative treatment. In 3 cases caesarean section was necessary. The deterioration of the fetal heart rate was usually associated with maternal hypotension.

Anesthesia, Epidural