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Dive into the research topics where Jan-Henrik Olsson is active.

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Featured researches published by Jan-Henrik Olsson.


British Journal of Obstetrics and Gynaecology | 1996

A randomised prospective trial comparing laparoscopic and abdominal hysterectomy.

Jan-Henrik Olsson; Marie Ellström; Mats Hahlin

Objective To compare short term clinical results in a prospective randomised trial of laparoscopic hysterectomy compared with abdominal hysterectomy.


Obstetrics & Gynecology | 1998

A randomized trial with a cost-consequence analysis after laparoscopic and abdominal hysterectomy.

Marie Ellström; José Ferraz-Nunes; Mats Hahlin; Jan-Henrik Olsson

Objective To perform a cost-consequence analysis after total laparoscopic hysterectomy (TLH) and total abdominal hysterectomy (TAH). Methods Women scheduled for TAH were randomized prospectively to undergo the procedure by laparoscopic (n = 71) or abdominal (n = 72) surgery. Postoperative health status was assessed using The Medical Outcome Trust 36-Item Short-Form Health Survey questionnaire. The financial accounting system at the hospital and information from the local national health insurance office were used for the economic analysis. We evaluated changes in direct costs (hospital costs) and indirect costs (loss of production value) when performing a laparoscopic hysterectomy instead of an abdominal hysterectomy. Results Postoperative health status improved significantly faster after TLH than after TAH. The direct costs were 1.7% higher and the indirect costs 50.3% lower for patients undergoing laparoscopic surgery. The total costs were 23.1% lower after laparoscopic hysterectomy. Conclusion A change in surgical technique from abdominal to laparoscopic hysterectomy was possible without compromising the health status of the patients, and it provided substantial financial benefits to society.Objective To compare the effectiveness of intravaginal and intracervical prostaglandin E2 (PGE2) gel for cervical ripening, defined as an increase of 3 or greater in the Bishop score, and for induction of labor. Methods Women with Bishop score 4 or less were assigned randomly to receive either 2 mg PGE2 intravaginally (n = 125) or 0.5 mg intracervically (n = 122). If the Bishop score was 4 or less, another dose of PGE2 was given after 6 hours, and up to two additional doses were given 6 hours apart on the second day. An oxytocin infusion was begun when the Bishop score was 5 or greater in absence of spontaneous labor, or if labor had not begun on the third day. Results Baseline characteristics of the two groups were similar. Survival analysis showed that time from PGE2 application, to obtain an increase of 3 or greater in the Bishop score, to vaginal delivery was significantly shorter with intravaginal PGE2 (logrank test: P = .003 and < .001 after stratification for parity, respectively). Thirty-one percent of women in the intravaginal gel group required oxytocin for labor induction compared with 63% in the intracervical group (P < .001). There were no significant differences in relation to cesarean delivery rate, Apgar scores at 5 minutes, and arterial umbilical cord pH, although the power of our study was limited to detect differences in proportions of adverse outcomes. Conclusion Vaginal PGE2 gel is more effective than intracervical gel for cervical ripening and labor induction.


Acta Obstetricia et Gynecologica Scandinavica | 1998

Pain and pulmonary function following laparoscopic and abdominal hysterectomy: a randomized study

Marie Ellström; Monika Fagevik Olsén; Jan-Henrik Olsson; Gunnar Nordberg; Anders Bengtsson; Mats Hahlin

BACKGROUND The aim of this study was to evaluate pain and pulmonary function the first two days after abdominal and laparoscopic hysterectomy. METHODS Women scheduled for abdominal hysterectomy were prospectively randomized to either laparoscopic (n=20) or abdominal (n=20) hysterectomy. Analgesics were self-administered by the patients by means of a programable infusion pump containing morphine. Postoperative pain was evaluated using a visual analog scale. Oxygen saturation was measured with an oxymeter. Pulmonary function was assessed using a peak flow meter measuring peak expiratory flow and a vitalograph measuring forced vital capacity and forced expiratory volume in one second. RESULTS Pain scores were lower after laparoscopic hysterectomy at the first (p<0.05) and second postoperative day (p<0.01). Lung function was impaired on days 1 and 2 postoperatively, measured as peak expiratory flow, forced vital capacity and forced expiratory volume in one second, in both groups compared to the preoperative values. The patients undergoing laparoscopic hysterectomy had less impairment of lung function measured by peak expiratory flow (p<0.01), forced vital capacity (p<0.05) and forced expiratory volume in one second (p<0.05) the first postoperative day compared to the patients undergoing abdominal hysterectomy. The second postoperative day differences between the groups remained for peak expiratory flow (p<0.05) and forced expiratory volume in one second (p<0.05). CONCLUSIONS Laparoscopic hysterectomy results in less pain and less impairment of respiratory function compared to abdominal hysterectomy.


Acta Obstetricia et Gynecologica Scandinavica | 2002

Patient accept questionnaires integrated in clinical routine: a study by the Swedish National Register for Gynecological Surgery

Mona B. Ladfors; Mats Löfgren; Barbara Gabriel; Jan-Henrik Olsson

Background. In 1996, the Swedish National Register for Gynecological Surgery started to collect pre‐ and postoperative information on patients using questionnaires given out as part of routine medical care. The information is used in providing clinical care to the patient and for quality assessment.


Acta Obstetricia et Gynecologica Scandinavica | 1984

In vitro effect of danazol on steroidogenesis in developing human follicles: An interim report

Lars Nilsson; Bo L. Dennefors; Jan-Henrik Olsson; Torbjörn Hillensjö; Gunnar Rannevik

Abstract. In order to show whether or not danazol exerts direct effects on the cells Of the human ovarian follicle, fOI% cular granulosa and thecal cells of follicles in different stages of development are currently being investigated in short‐term incubation experiments and during more prolonged cell culture.


Annals of the New York Academy of Sciences | 1991

Effects of Insulin‐like Growth Factor I and Growth Hormone in Cultured Human Granulosa Cellsa

Christina Bergh; Björn Carlsson; Jan-Henrik Olsson; Håkan Billig; Torbjörn Hillensjö

Human granulosa cells, obtained either from natural or stimulated cycles, were cultured, and the response to IGF-I and GH was analyzed. It was found that IGF-I alone stimulated thymidine incorporation in both types of granulosa cells. Furthermore, IGF-I alone and in combination with FSH or LH enhanced estradiol and progesterone production. In a limited series of experiments, GH in combination with FSH was found to stimulate steroidogenesis in granulosa cells obtained from natural, but not from stimulated, cycles.


Acta Obstetricia et Gynecologica Scandinavica | 1986

Vaginitis emphysematosa in a renal transplant patient

Jostein Tjugum; Fredrik Jonassen; Jan-Henrik Olsson

Transplant surgery is now a widely established practice and the associated immunosuppressive treatment is followed by various complications. the present report on vaginitis emphysematosa in a woman with renal transplantation indicates that even this benign condition may have a connection with immunosuppressive therapy.


Fertility and Sterility | 1988

Danazol concentrations in human ovarian follicular fluid and their relationship to simultaneous serum concentrations

Jan-Henrik Olsson; Anton Döberl; Lars Nilsson

Danazol concentrations in follicular fluid and serum were studied in eight women scheduled for laparoscopy because of suspected endometriosis. In order to obtain some variation in follicular maturity, danazol administration was started 2 to 7 days before the expected day of ovulation. A total of nine doses were given, i.e., 200 mg four times daily for 2 days; the last 200-mg dose was given 3 hours before the laparoscopy during which the follicular fluid from the dominant follicle was aspirated. Peripheral venous blood samples were drawn before, during, and after laparoscopy. Danazol concentrations were assayed by means of a high-performance liquid chromatography method. At the time of follicular aspiration, the mean concentration of danazol was estimated at 96 ng/ml in serum and at 71 ng/ml in follicular fluid, i.e., an average of 73% of the simultaneous serum concentration. The data suggest that even short-term therapy with danazol is likely to produce intrafollicular drug concentrations that have a direct inhibitory effect on follicular steroidogenesis.


Acta Obstetricia et Gynecologica Scandinavica | 1986

Influence of Clomiphene Citrate in Vivo On Subsequent Steroid Formation and Gonadotropic Responsiveness in Vitro of Isolated Human Follicular Cells

Jan-Henrik Olsson; Bo L. Dennefors; Lars Nilsson

Granulosa and thecal cells from human preovula‐tory follicles, extirpated from the ovaries of women undergoing sterilization by minilaparotomy, were incubated for 2 hours in the presence or in the absence of human gonadotropin (hCG). the follicles were obtained from 16 women, 8 of whom had previously been treated with clomi‐phene citrate (CC) to induce follicular maturation. the tissue contents of cyclic AMP (cAMP) and the content of progesterone (P), testosterone (T) and estradiol‐17β (E2) in the incubation medium were measured. Granulosa and thecal cells from control and CC‐induced follicles all responded to hCG in vitro with increased formation of cAMP. Both granulosa and thecal cells from CC‐induced follicles produced larger amounts of P in vitro than cells from spontaneously matured follicles. There were no other differences in the patterns of steroid formation or reactivity to hCG between the cells from the two types of follicle. It is concluded that CC treatment in vivo induces the growth and maturation of preovulatory follicles with apparently normal biochemical characteristics, as far as the content of and capacity to form cyclic AMP, progesterone, testosterone and estradiol‐17β are concerned.


Fertility and Sterility | 1993

Regulation of androgen production in cultured human thecal cells by insulin-like growth factor I and insulin**Supported by grant no. 5987 from the Swedish Medical Research Council, Swedish Medical Society, The Medical Society of Göteborg, Kabi-Pharmacia Ltd., Nordisk Insulin Foundation, Hjalmar Svenssons Research Foundation, Swedish Society for Medical Research, and the University of Göteborg, Göteborg, Sweden.

Christina Bergh; Björn Carlsson; Jan-Henrik Olsson; Ulrika Selleskog; Torbjörn Hillensjö

OBJECTIVES To investigate if human thecal cells contain messenger ribonucleic acid (RNA) encoding insulin-like growth factor I (IGF-I) and insulin receptors and if IGF-I and insulin could stimulate androgen production in thecal cells. DESIGN Poly-adenine+ RNA was extracted from fresh thecal tissue, and the expression of the genes encoding insulin and IGF-I receptors were analyzed. Isolated thecal cells were cultured 4 to 6 days with and without hormones. SETTING Procedures were performed in a university laboratory. PATIENTS Eight women in the follicular phase of natural cycles were undergoing gynecological laparotomy for reasons unrelated to ovarian pathology. The leading follicle(s) was excised, and dispersed cells of the theca interna layer were isolated through combined mechanical and enzymatic techniques. INTERVENTIONS Luteinizing hormone (LH), IGF-I, and insulin were added to the cell cultures. MAIN OUTCOME MEASURE The expression of IGF-I receptor and insulin receptor transcripts were analyzed by Northern blot. Medium levels of androstenedione and testosterone were measured by radioimmunoassay. RESULTS In the separated thecal tissue both IGF-I receptor and insulin-receptor transcripts were detected. Insulin-like growth factor I and insulin potentiated LH-induced androgen secretion while having less pronounced effects on basal androgen production. CONCLUSION The present study demonstrates that both insulin and IGF-I receptor genes are expressed and that insulin and IGF-I can stimulate steroid production in human thecal cells. The study provides further support for the hypothesis that IGF-I and insulin may be involved both in physiological regulation of ovarian function as well as in its pathophysiology.

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Christina Bergh

Sahlgrenska University Hospital

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Lars Nilsson

University of Gothenburg

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Mats Hahlin

University of Gothenburg

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Ulrika Selleskog

Sahlgrenska University Hospital

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Håkan Billig

University of Gothenburg

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