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Biomedical subjects

C Dahl

Publications and source records attributed to C Dahl.

At least 73 records · Page 4Linked to original sources
PubMed1990

[False negative mammography].

During the period 1.1.1984-31.12.1986, primary surgical treatment of 423 women with palpaple, invasively progressing cancer of the breast was performed. All of these had been examined mammographically prior to operation. The uncorrected nosographical sensitivity of the mammographic investigation was 0.93, decreasing to 0.83 prior to the age of 50 years. It is emphasized that patients in whom there is a disproportion between the mammographic and palpatory findings must be referred for surgical assessment without delay.

Adult↗
PubMed1990

Induction of labour: the effect of vaginal prostaglandin or i.v. oxytocin--a matter of time only?

Ninety-one pregnant women with unfavourable cervix (Bishop score no higher than 6) were randomly allocated to induction of labour with either prostaglandin E2 suppositories 2.5 mg 1-2 a day or i.v. oxytocin 4-32 mU/min. The induction procedure was carried on for 2 days. For statistical comparison of efficacy, life table analysis and the logrank test were used with vaginal delivery as the aimed 'event'. Prostaglandin suppositories were more efficient after 12 h (p less than 0.025) and 24 h (p less than 0.005), whereas no difference in efficacy was observed after 48 h. Vaginal delivery was obtained within 48 h in 74% of the women in the prostaglandin group and in 70% in the oxytocin group. No difference was observed in methods of delivery or neonatal Apgar scores, though, in neonates delivered vaginally within 2 days, lowered umbilical artery blood pH values were found after prostaglandin E2 suppositories (p less than 0.05). The patients attitude toward the method of induction was highly in favour of the prostaglandin suppositories. Prostaglandin E2 suppositories are considered excellent for induction of labour if delivery has to be within 24 h, whereas the two methods are equally effective after 48 h.

Administration, Intravaginal↗
PubMed1990

Preparing the educational interpreter. A survey of sign language interpreter training programs.

Despite rapid growth in the field of educational interpreting little is known about the formal training of educational interpreters. This gap in the research is the focus of this study. A questionnaire was sent to the directors of 50 interpreter training programs nationwide asking for information about their course work in educational interpreting and related areas; instruction in signed English systems; and the directors' opinions on certain ethical and professional questions facing the educational interpreter. The results suggest that graduates of interpreter training programs who obtain employment as public school interpreters are not adequately prepared. Training programs provide few courses on the education of deaf children, on the language systems used, and on issues specific to classroom interpreting. The directors of these programs overwhelmingly support the development of guidelines on the educational interpreter's role. They show some support for the "interpreter as tutor" role but are equivocal about the development of a special certification for educational interpreters.

Data Collection↗
PubMed1989

[Non-palpable tumors of the breast demonstrated by mammography].

During the period 1.1.1985-28.2.1987, 114 mammographic markings with needles were undertaken on cancer-suspect, non-palpable tumours of the breast in 106 patients. In 27.2% of the cases, carcinomata were found and, in 16.7%, carcinoma in situ. Mammographic examination combined with needle marking is recommended as a diagnostic supplement to clinical examination.

Adult↗
PubMed1989

Lamicel does not promote induction of labour. A randomized controlled study.

Lamicel is a synthetic tent, which, when inserted in the cervical canal, dilates the cervix by osmosis. Lamicel as an adjunct to induction of labour with intravenous oxytocin or vaginal prostaglandin E2 has been examined in a randomized controlled trial. Ninety-one pregnant women with an unripe cervix participated in the study. No improvement in efficacy was observed in the Lamicel groups compared to the control groups, neither when induction of labour was performed with oxytocin nor with vaginal prostaglandin.

Apgar Score↗
PubMed1988

Con A-stimulated thymocytes produce interleukin 2 after removal of Lyt-1 positive cells.

Mouse lymphocytes produce several lymphokines, including interleukin 2 (IL-2) and colony-stimulating factors (CSFs) following stimulation with T-cell mitogens. However, very little IL-2 is produced by thymocytes upon concanavalin A (Con A) stimulation. Strong selective inhibition of IL-2 production was observed when fresh spleen cells were mixed with Con A-activated thymocytes. Sorting of populations on the basis of antigenic phenotype showed that the cell mediating the blockage in IL-2 secretion is a large T cell expressing markers for both Lyt-1 and Lyt-2. This specific inhibition of IL-2 accumulation was not mediated by a soluble product, or by absorption on expressed IL-2 receptors on the activated thymocytes. Removal of the Lyt-1 positive cells from a thymocyte population renders it capable to produce IL-2 upon Con A stimulation, indicating a functional role of these cells.

Animals↗
PubMed1988

Microsurgical reversal of female sterilization.

Between 1979 and 1985, 25 consecutive, unselected women (age 28-40 years, median 34) underwent microsurgical tubo-tubal anastomosis for reversal of sterilization. The overall pregnancy rate was 44%. The incidence of pregnancy was correlated to the tubal length after reversal. Of 12 women with tubal lengths exceeding 5.5 cm, 8 (67%) became pregnant. Of the 13 women with tubal lengths under 5.5 cm only 3 (23%) conceived (p less than 0.04). There was no significant correlation between pregnancy rate and age, interval since sterilization, or the sterilization procedure itself.

Adult↗
PubMed1988

Partial purification and characterization of ADP sulfurylase from the purple sulfur bacterium Thiocapsa roseopersicina.

High activities of ADP and ATP sulfurylase were found in the soluble protein fraction of Thiocapsa roseopersicina strain 6311 (DSM 219). ADP sulfurylase was partially purified and characterized. It was a very labile soluble enzyme with a molecular weight of 250,000. The optimum pH was 7.5 and the optimal temperature 35 degrees C. Under test conditions the apparent Km values were determined to be 0.33 mM for adenylylsulfate and 13 mM for phosphate.

Chromobacterium↗
PubMed1988

Large granular lymphocyte proliferation: an analysis of T-cell receptor gene arrangement and expression and the effect of in vitro culture with inducing agents.

The status of the T cell receptor beta and gamma genes in natural killer (NK) cells was investigated in two patients with a marked expansion of CD2+, CD3- NK cells. Both genes were found to be in the germline state. The T alpha and complete T beta gene transcripts were not detected, but a 1.0-kilobase T beta gene transcript could be demonstrated at low levels in freshly isolated cells and at a much higher level in interleukin-2 (IL-2)-cultured cells. The transcript coding for the delta chain of the CD3 complex was also absent. These cells were cultured in IL-2 with or without the addition of the differentiation-inducing agents: retinoic acid, N,N-hexamethylene bisacetamide, and sodium butyrate. The cultured cells retained their NK activity except in culture with sodium butyrate at greater than or equal to 1 mmol/L. Expression of CD3 or other T cell surface markers by the NK cells was not observed in these cultures. Either CD2+, CD3- NK cells are derived from a non-T lineage, or they have diverged from the T cell lineage earlier than the stage of T gamma gene rearrangement and CD3 delta chain expression; they are refractory to many induction signals in undergoing further T cell differentiation.

Acetamides↗
PubMed1987

Prostaglandin E2 vaginal suppository for induction of labour: an efficient, safe and popular method.

Two different methods for induction of labour were randomly used in 100 women with a favourable cervix. The patients were treated with either prostaglandin vaginal suppositories containing 2.5 mg PGE2 in a base of Witepsol S55 (Dynamit Nobel) or intravenous infusion of oxytocin. The PGE2 vaginal suppository was significantly more efficient than the intravenous infusion of oxytocin in relation to the time interval from the start of induction of labour to delivery. Also the percentage of women who delivered within 48 hours (success rate) was higher in the suppository group. Significantly more women in the suppository group found this induction method recommendable.

Dinoprostone↗
PubMed1987

A protein kinase antigenically related to pp60v-src possibly involved in yeast cell cycle control: positive in vivo regulation by sterol.

The effects of ergosterol, yeast's natural sterol, on cell cycling and a protein kinase antigenically related to pp60v-src were examined in a sterol auxotroph of Saccharomyces cerevisiae. Sterol-depleted cells accumulate in an unbudded, G1 state. Cell budding and proliferation are reinitiated upon addition of nonlimiting ergosterol or cholesterol with trace ergosterol, whereas cholesterol or trace ergosterol alone is less effective. Stimulation of a protein kinase associated with immune complexes of yeast protein and anti-pp60v-src shows a positive correlation with exit from the G1 phase following ergosterol addition. Ergosterol-stimulated cells also demonstrate an increase in phosphatidylinositol kinase activity. The data suggest that hormonal levels of ergosterol (effective concentration, approximately equal to 1 nM) participate in a signaling process associated with a protein kinase possibly involved in yeast cell cycle control.

Cell Cycle↗
PubMed1986

[Gynecomastia].

Explore the source record for details and available documents.

Adolescent↗
PubMed1986

Gastric cancer risk in achlorhydric patients. A long-term follow-up study.

Achlorhydria, determined by the augmented histamine test, is the functional expression of the most severe atrophic gastritis and is followed by a 4- to 6-fold increased risk of gastric cancer, as we found 5 cancers in 114 patients after a mean observation period of 8.4 years. The cancers developed from 1 to 17 years after achlorhydria diagnosis--three cases after more than 9 years. The study showed no difference in gastric cancer risk between patients with and without pernicious anaemia. Spontaneous achlorhydria is the late result of atrophic gastritis, which should be regarded the premalignant condition. The development of gastric cancer from pharmacologically reduced acid secretion must be regarded as highly hypothetical, since this is not followed by atrophic gastritis.

Achlorhydria↗
PubMed1986

Optical internal urethrotomy with and without catheter. A comparative study.

The role of postoperative catheter treatment after optical internal urethrotomy was studied in a prospective, consecutive, randomised series of 54 patients. Group one was treated without catheter and group two with catheter for one day. No significant difference in recurrence rate was found between the two groups studied by means of voiding interview, uroflowmetry and retrograde urethrography.

Adult↗
PubMed1985

Hydrogen ion concentration of tear fluid in newborn infants.

Tear pH was measured in 173 newborn infants by immersing the tip of a microcombination glass pH probe in the tear fluid lateral in the closed lower conjunctival sac. The median tear pH value was 6.8 with 95% interpercentile range 6.2 to 7.2. The mean tear pH value was 6.74 +/- 0.26 (SD). The pH value was not related to age within the first 12 days and not influenced by the mode of delivery or local application of 0.67% argenti nitratis. This method is an easy, reliable examination to record the pH values of tear fluid, and may widen the knowledge of tear function in normal and pathological conditions.

Female↗