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G Hoff

Publications and source records attributed to G Hoff.

85 records · Page 5Linked to original sources
PubMed1981

Pancreatic pseudocyst and pancreatico-duodenal fistula diagnosed by endoscopic fistulography.

To our knowledge, primary endoscopic diagnosis of pancreaticoduodenal fistulae has not so far been reported. The diagnosis is often made radiographically at endoscopic retrograde cholangiopancreatography (ERCP). We report one such case, in which a barium meal x-ray suggested duodenal ulceration, and the endoscopic findings suggested a duodenal diverticulum, the bottom of which could not be clearly defined. Instillation of contrast medium revealed the true fistulous nature of the diverticulum-like defect in the duodenal wall. This patient also had a pancreatic pseudocyst communicating with the fistula through the caudal part of the pancreatic duct, visualized during endoscopic fistulography. The patient did well on conservative treatment without surgical intervention.

Adult↗
PubMed1981

The Worthington "ultrafree" device evaluated for determination of ultrafiltrable calcium in serum.

We evaluated a commercially-available disposable device ("Ultrafree," Worthington Diagnostics) for the anaerobic preparation of protein-free ultrafiltrates from serum for measurement of ultrafiltrable calcium. Sufficient filtrate for the analysis is obtained with 10 min from 0.2 to 0.4 mL of serum at room temperature. We assessed these ultrafilters with regard to permeability of calcium citrate, exclusion of proteins, frequency of leakage, and effect of temperature on results. Within-run and day-to-day coefficients of variation for human serum pools were 1.2 and 1.5%, respectively. Reference intervals (in mmol/L) for total (2.16-2.58), ultrafiltrable (1.44-1.67), dialyzable (1.25-1.41), and ionized (1.04-1.25) calcium have been determined for a healthy population of 69 women and 81 men, ages to 18 to 65 years. The device appears to be the most practicable yet available for use in making this measurement.

Adolescent↗
PubMed1979

[Sarcoidosis].

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Aged↗
PubMedDate not supplied

Early- and late-onset pelvic inflammatory disease among women with cervical Chlamydia trachomatis infection at the time of induced abortion--a follow-up study.

After termination of a double-blind, randomized study on erythromycin in the prevention of post-abortion infection, 34 women (14 treated with erythromycin, 20 not treated with erythromycin) harbouring Chlamydia trachomatis were followed up within 6 weeks and again 2 to 24 months after the abortion in order to detect an early- and late-onset pelvic inflammatory disease (PID). For statistical analysis survival analysis by Kaplan-Meir estimates and Mantel-Cox test were carried out. Untreated women with C. trachomatis infection at the time of abortion had a cumulative risk of 72% of developing early and/or late PID, if observed for 24 months. This cumulative risk was significantly reduced to 8% if the C. trachomatis infection was treated at the time of the abortion. Screening for and treatment of C. trachomatis is warranted, especially in women < or = 25 years old, to avoid early and late-onset PID after induced first trimester abortion.

Abortion, Induced↗
PubMedDate not supplied

Cross-sex transmission of infection and increased mortality due to measles.

In an urban and a rural area of Guinea-Bissau, the incidence of and mortality due to measles were followed over four years. Significantly higher case-fatality ratios among secondary cases occurred when infection was transmitted across sexes than within the same sex. The case-fatality ratio was highest for girls infected by boys and lowest for girls infected by girls. Published reports of cases of fatal measles indicate a similar tendency. Apparently, no general background factor or difference in social interaction between children can explain this variation in severity of infection. It is therefore hypothesized that cross-sex transmission of measles virus produces infections of greater severity. These observations may suggest that measles virus incorporates host-specific cellular characteristics that interfere with the immune responses of persons infected by a member of the opposite sex.

Adolescent↗
PubMedDate not supplied

A comparison of an enzyme immunoassay and cell culture for detection of Chlamydia trachomatis in genito-urinary specimens.

Chlamydia trachomatis infection is easy to treat but laborious to diagnose by culture. An antigen-detecting enzyme immunoassay (EIA; Chlamydiazyme, Abbott Laboratories, North Chicago, IL), suitable for testing many samples, was compared with the conventional iodine-stained, one-passage culture. A total of 471 duplicate samples from 218 men (urethra) and 128 women (urethra and cervix) attending a sexually transmitted disease clinic were examined by both tests. The overall sensitivity, specificity, and predictive value of positive and negative results were 80.3%, 96.7%, 86.4%, and 95.0%, respectively. No difference between male and female patients was observed. A remarkable difference between sensitivities of female urethral (60.0%) and cervical (95.5%) samples was found. This difference is clearly important in cases of women with urethral infection only (19% in our study) and points to the need for further improvement of this EIA.

Bacteriological Techniques↗