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Biomedical subjects

U Mahajan

Publications and source records attributed to U Mahajan.

9 recordsLinked to original sources
PubMed1994

Copper levels & reactive oxygen species in uterine flushings in copper intrauterine contraceptive device users.

Copper levels were estimated in the uterine flushings in 15 copper 'T' 200 device acceptors. There was a statistically significant difference in the preinsertion and one week post insertion values (P < 0.001). This also corresponded to a high level of generation of reactive oxygen species. The levels of reactive oxygen species were similar to preinsertion values at 4 and 12 wk. The copper values declined over the 3 months but were still higher at 12 wk as compared to preinsertion levels and this difference was statistically significant. Hence addition of copper to the intrauterine device besides enhancing the contraceptive efficacy, perhaps also plays an important role in microbicidal activity and helps in overcoming the infection introduced at the time of insertion.

Adult↗
PubMed1991

A continuum model of elephant trunks.

A continuum model is presented that relates the trunk parameters of loading, geometry, and muscle structure to the necessary conditions of static equilibrium. Linear theory for stress-strain behavior is used to describe an elephant trunk for an incremental displacement as the animal slowly lifts a weight at the trunk tip. With this analysis and experimental values for the trunk parameters, the apparent trunk stiffness Ea is estimated for the living animal. For an Asian elephant with a maximum compression strain of 33 percent, Ea is of the order of 10(6) N/m2. The continuum model is quite general and may be applied to similar nonskeletal appendages and bodies of other animals.

Animals↗
PubMed1990

Macroscopic tuboplasty: reversal of female sterilization.

Data is presented regarding 57 women who underwent reversal of sterilization procedure. In the majority (90%), the reason for request for reversal of procedure was loss of male child or more than one child. Thirteen subjects never came back for follow-up. Out of 39 subjects in whom follow-up is available for more than 3 months, in 35 (90%) the tubes are patent. There were 25 pregnancies in 21 subjects and incidence of viable pregnancy was 88% with only ectopic pregnancy (4%). In these 35 cases whose tubes were found to be patent post tuboplasty, 18 had laparoscopic ring application, 16 had abdominal tubal ligation and one had undergone vaginal tubal ligation. Thirteen subjects (62%) conceived within 6 months after reversal. In this series, no loupe or operating microscope was used.

Adult↗
PubMed1990

Spectrophotometric analysis of amniotic fluid in Rh immunised pregnancies.

A total of 307 amniotic fluid analysis done in 344 Rh negative immunised mothers showed that 46, 83 and 178 delta OD values at 450 millimicrons fell in the upper, middle and lower zones of Liley's charts respectively. The correlation of spectrophotometric analysis with the condition of the baby at birth was about 95 per cent in the upper and lower zones. In the middle zone, however, it was about 75 per cent only. Also, in 7 women in whom the OD at 450 millimicrons fell in the middle zone, the babies were found to be Rh negative; in another baby, the OD difference fell in upper zone. In spite of these limitations amniotic fluid examination seems to be an important single guide to severity, being superior to other parameters like previous obstetric history, antibody titre alone and Liley's charts, which are still widely used.

Amniotic Fluid↗
PubMed1989

Laparoscopic removal of translocated intrauterine contraceptive devices.

Data is presented regarding 20 translocated intrauterine contraceptive devices (IUCD). Successful laparoscopic removal was made in 13 (65%) cases though all these devices were Copper 'T' 200 model which tend to produce dense adhesions. Only when the IUCD was suspected to be partially or fully in the gut lumen or thick adhesions were present, or the device was not visualised, was laparotomy performed. Hence it is advocated that laparoscopy should be performed as a routine in patients with suspected translocated IUCD, as it obviates the need for laparotomy and thus decreases the duration of the hospital stay as well as preventing morbidity associated with laparotomy.

Adult↗
PubMed1986

Management of translocated and incarcerated intrauterine contraceptive devices.

Thirty-seven consecutive patients who reported with absent or snapped strings and failed attempts at removal of intrauterine contraceptive devices (IUCD) by hooks or curette were posted for hysteroscopy/laparotomy following a plain X-ray of the pelvis to exclude unrecognized spontaneous expulsion. Direct visualization of the endometrial cavity was invaluable in locating and removing IUCDs, particularly the embedded and fragmented ones. Translocated medicated devices were associated with dense adhesions, suggesting the need for their prompt removal. There appears to be an increased risk of translocation in lactating women.

Adult↗