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Biomedical subjects

W M Ankum

Publications and source records attributed to W M Ankum.

At least 37 records · Page 2Linked to original sources
PubMed1998

Systemic methotrexate therapy versus laparoscopic salpingostomy in patients with tubal pregnancy. Part I. Impact on patients' health-related quality of life.

OBJECTIVE: To compare patients' health-related quality of life after systemic methotrexate therapy versus laparoscopic salpingostomy for tubal pregnancy. DESIGN: Multicenter randomized clinical trial. SETTING: Departments of obstetrics and gynecology of six Dutch hospitals. PATIENT(S): Hemodynamically stable patients with a laparoscopically confirmed unruptured tubal pregnancy without signs of active bleeding, who were randomly assigned to undergo either systemic methotrexate therapy or laparoscopic salpingostomy. INTERVENTION(S): Standard health-related quality of life questionnaires administered before and 2 days, 2 weeks, 4 weeks. and 16 weeks after confirmative laparoscopy. MAIN OUTCOME MEASURE(S): Health-related quality of life. RESULT(S): Health-related quality of life was impaired most severely 2 days after confirmative laparoscopy in both treatment groups and improved during follow-up. Health-related quality of life was impaired more severely after systemic methotrexate therapy than after laparoscopic salpingostomy. Medically treated patients had more limitations in physical functioning, role functioning, and social functioning; had worse health perceptions, less energy, more pain, more physical symptoms, and a worse overall quality of life; and were more depressed than surgically treated patients. CONCLUSION(S): Systemic methotrexate therapy had a more negative impact on patients' health-related quality of life than did laparoscopic salpingostomy. This negative impact on patients' health-related quality of life of systemic methotrexate therapy should be taken into account when deciding on the appropriate therapy for tubal pregnancy.

Adaptation, Psychological↗
PubMed1998

Systemic methotrexate therapy versus laparoscopic salpingostomy in tubal pregnancy. Part II. Patient preferences for systemic methotrexate.

OBJECTIVE: To investigate patient preferences for systemic methotrexate therapy relative to laparoscopic salpingostomy in the treatment of tubal pregnancy. DESIGN: Preference assessment in controlled clinical study. SETTING: Four hospitals and one infertility clinic. PATIENT(S): Forty patients who had been treated for tubal pregnancy and 40 nonpregnant controls. INTERVENTION(S): Preference for methotrexate therapy relative to salpingostomy was established during an interview. Two scenarios were offered for methotrexate therapy: one with and one without preceding diagnostic laparoscopy. Hypothetical tubal patency rates after methotrexate therapy were varied in both scenarios until patients switched in their initial preference. MAIN OUTCOME MEASURE(S): Preference for systemic methotrexate therapy. RESULT(S): Only a few patients switched in their initial preference when the tubal patency rate after systemic methotrexate therapy was varied. Most preferred methotrexate therapy without an increase in the tubal patency rate in a scenario without preceding diagnostic laparoscopy. A small group never opted for methotrexate therapy even when it would guarantee a 100% tubal patency rate. CONCLUSION(S): Systemic methotrexate therapy would be preferred by most patients as part of a completely nonsurgical management strategy. Tubal patency was a decisive factor for treatment preference in a minority of patients only.

Adult↗
PubMed1998

Serum human chorionic gonadotropin measurement in the diagnosis of ectopic pregnancy when transvaginal sonography is inconclusive.

OBJECTIVE: To assess the accuracy of initial and repeated serum hCG measurements in the diagnosis of ectopic pregnancy (EP) in patients in whom transvaginal sonography is inconclusive and to evaluate whether patient characteristics influence the accuracy of serum hCG measurements. DESIGN: Prospective study. SETTING: Two large teaching hospitals in Amsterdam, the Netherlands. PATIENT(S): Three hundred fifty-four consecutively seen pregnant patients with suspected EP and inconclusive transvaginal sonographic findings. INTERVENTION(S): Serum hCG measurements. MAIN OUTCOME MEASURE(S): The performance of repeated serum hCG measurements in the diagnosis of EP was evaluated through the analysis of receiver operating characteristic curves. RESULT(S): Initial serum hCG measurements were more diagnostic in conjunction with sonographic evidence of an ectopic mass or fluid in the pouch of Douglas than in the absence of sonographic abnormalities. On repeated measurement, the course of the serum hCG concentration provided more diagnostic information than did the absolute serum hCG concentration 2 and 4 days after the start of the diagnostic process. CONCLUSION(S): The interpretation of serum hCG measurements should depend on additional findings at transvaginal sonography. A cutoff level of 1,500 IU/L is recommended for patients with an ectopic mass or fluid in the pouch of Douglas; in patients without these findings, the cutoff level should be at least 2,000 IU/L. Four days after the start of the diagnostic process, any rise in the serum hCG concentration makes the diagnosis of EP very likely.

Chorionic Gonadotropin↗
PubMed1998

The accuracy of single serum progesterone measurement in the diagnosis of ectopic pregnancy: a meta-analysis.

Serum progesterone measurement has been advocated as a diagnostic tool in the non-invasive diagnosis of ectopic pregnancy. To assess the accuracy of a single serum progesterone measurement in the diagnosis of ectopic pregnancy, a meta-analysis was performed incorporating 26 studies evaluating the performance of single serum progesterone measurement in the diagnosis of ectopic pregnancy. A distinction was made in the diagnosis of pregnancy failure of any type versus viable intrauterine pregnancy and the diagnosis of ectopic pregnancy versus non-ectopic pregnancy. The reported sensitivity and specificity differed between the studies. Since there was a clear negative correlation between sensitivity and specificity, summary receiver-operating characteristic (ROC) curves could be estimated. The ROC curve for the diagnosis of pregnancy failure versus viable intrauterine pregnancy showed a good discriminative capacity. Single serum progesterone measurement could not discriminate between ectopic pregnancy and non-ectopic pregnancy. It is concluded that serum progesterone measurement can identify patients at risk for ectopic pregnancy, who need further evaluation, but its discriminative capacity is insufficient to diagnose ectopic pregnancy with certainty.

Female↗
PubMed1998

Prevalence of Asherman's syndrome after secondary removal of placental remnants or a repeat curettage for incomplete abortion.

This prospective study assesses the prevalence of intrauterine adhesions among women undergoing secondary removal of placental remnants after delivery, or a repeat curettage for incomplete abortions, and evaluates risk factors associated with the presence of intrauterine adhesions. In 50 women, undergoing either a secondary removal of placental remnants more than 24 h after delivery, or a repeat curettage for incomplete abortions, ambulatory hysteroscopy was performed 3 months after the intervention. Intrauterine adhesions were found in 20 of the women (40%): five patients had Asherman's syndrome grade I, six had grade II, six had grade III and three had grade IV. In women with menstrual disorders a statistically significant 12-fold increased risk for Asherman's syndrome grade II-IV was found. Previous abortion as well as infection during surgery were associated with a mildly but non-significant increased risk. Based on our findings, hysteroscopy is recommended only in those patients who develop menstrual disorders, either after secondary intervention for placental remnants after delivery or after a repeat curettage.

Abortion, Incomplete↗
PubMed1998

Fertility after conservative and radical surgery for tubal pregnancy.

A retrospective cohort study was set up to evaluate the effectiveness of conservative and radical surgery for tubal pregnancy towards subsequent fertility. Consecutive patients undergoing conservative or radical surgery for tubal pregnancy between January 1990 and August 1993 in two university hospitals were included in the study. Outcome measures were spontaneous intrauterine pregnancy (IUP) and repeat ectopic pregnancy (EP). Of the 135 patients analysed, 56 underwent conservative surgery and 79 underwent radical surgery. Patients treated with conservative surgery achieved a higher 3-year cumulative pregnancy rate than those treated radically (P < 0.001, log-rank test). In patients treated conservatively, there was only one spontaneous IUP in the period between 18 months and 3 years after the tubal pregnancy. In contrast, patients treated radically continued to conceive in this period. Multivariate analysis showed a fecundity rate ratio (FRR) of 1.9 [95% confidence interval (CI): 0.91 to 3.8] for IUP after conservative surgery in the first 18 months of follow-up. In patients with a history of bilateral tubal disease the FRR was 3.1 (95% CI: 0.76 to 12), whereas in patients without a history of bilateral tubal disease the FRR was 1.4 (95% CI: 0.13 to 16). The FRR for repeat EP was 2.4 (95% CI: 0.57 to 11). Our data indicate a beneficial effect of conservative surgery towards subsequent fertility that was not, however, statistically significant in the multivariate analysis. In view of these inconclusive data and the importance of this major health problem, randomized studies are required to assess whether conservative surgery really improves the fertility prospects of patients with tubal pregnancy.

Adult↗
PubMed1997

Randomised trial of systemic methotrexate versus laparoscopic salpingostomy in tubal pregnancy.

BACKGROUND: Laparoscopic salpingostomy is a well-established treatment for patients with tubal pregnancy who desire to retain fertility. Another approach that preserves the fallopian tube is medical treatment. We compared systemic methotrexate and laparoscopic salpingostomy in the treatment of tubal pregnancy. Outcome measures were treatment success, tubal preservation, and homolateral tubal patency. METHODS: Between January, 1994, and September, 1996, haemodynamically stable patients with laparoscopically confirmed unruptured tubal pregnancy and no signs of active bleeding were randomly assigned systemic methotrexate (four 1.0 mg/kg doses of intramuscular methotrexate alternated with 0.1 mg/kg oral folinic acid) or laparoscopic salpingostomy. Treatment success was defined as complete elimination of the tubal pregnancy (serum human chorionic gonadotropin < 2 IU/L) and preservation of the tube. Homolateral tubal patency was assessed by hysterosalpingography. Analysis was by intention to treat. FINDINGS: 100 patients were included in the trial. Of 51 patients allocated systemic methotrexate, 42 (82%) were successfully treated with one course; two (4%) patients needed a second course for persistent trophoblast. Surgical intervention was needed in seven (14%) patients; salpingectomy was necessary in five of these patients for tubal rupture. Of the 49 patients allocated laparoscopic salpingostomy, 35 (72%) were successfully treated by laparoscopic salpingostomy alone; salpingectomy was needed in four (8%) patients, and ten (20%) needed methotrexate for persistent trophoblast. The tube was preserved in 46 (90%) patients in the methotrexate group versus 45 (92%) in the salpingostomy group (rate ratio 0.98 [95% CI 0.87-1.1]). Homolateral tubal patency could be assessed in 81 patients: the tube was patent in 23 (55%) of 42 patients in the methotrexate group and in 23 (59%) of 39 patients in the salpingostomy group (rate ratio 0.93 [0.64-1.4]). INTERPRETATION: In haemodynamically stable patients with unruptured tubal pregnancy, systemic methotrexate and laparoscopic salpingostomy were successful in treating the majority of cases. We found no significant difference between the treatments in the homolateral patency rate. Subsequent fertility outcome has to be awaited to show which treatment yields better fertility prospects.

Adult↗
PubMed1997

Diagnosis of ectopic pregnancy after in vitro fertilization and embryo transfer.

OBJECTIVE: The combination of transvaginal sonography and serum hCG measurement is reliable in the diagnosis of ectopic pregnancy (EP) in spontaneous pregnancies. In patients who became pregnant through IVF-ET, transfer of multiple embryos after IVF could be responsible for the different performance of these tests. We evaluated the discriminative capacity of transvaginal sonography in combination with hCG measurement in the diagnosis of EP after IVF-ET. DESIGN: Prospective cohort study. SETTING AND PATIENT(S): Consecutive patients, pregnant through IVF-ET, who presented with clinically suspected EP. INTERVENTION(S): Transvaginal sonography, serum hCG measurement at 6, 9, and 15 days after ET and after a negative transvaginal sonography. MAIN OUTCOME MEASURE(S): Ectopic pregnancy confirmed at laparoscopy. RESULT(S): Between September 1993 and May 1996, 86 women were included in the study, of whom 24 had an EP. Transvaginal sonography identified 46 intrauterine pregnancies and 5 EPs, but serum hCG could not diagnose EPs in patients in whom transvaginal sonography did not show a gestational sac. Serum hCG measurement 9 days after ET could identify pregnancy failure with 100% specificity at a cut-off value of 18 IU/L, but it could not identify patients with EP with enough certainty to justify immediate treatment. CONCLUSION(S): We recommend single serum hCG measurement 9 days after ET to discriminate between viable and nonviable pregnancies. Transvaginal sonography can be postponed until 5 weeks after ET, except for patients with abdominal pain and/or vaginal bleeding, or patients with a serum hCG level of < 18 IU/L.

Adult↗
PubMed1997

Screening for ectopic pregnancy in symptom-free women at increased risk.

OBJECTIVE: To determine the ectopic pregnancy rate among symptom-free women at increased risk undergoing a screening program involving transvaginal sonography and serum hCG testing. METHODS: Consecutive symptom-free women at increased risk for ectopic pregnancy were studied prospectively by transvaginal sonography and serum hCG measurement to detect ectopic pregnancy before the onset of symptoms. RESULTS: Between September 1993 and May 1996, 143 symptom-free pregnant women with pregnancies of a gestational age of less than 7 weeks were screened. Eight had ectopic pregnancies, 129 had intrauterine pregnancies, and six had trophoblast in regression. Among the eight women with ectopic pregnancies, one was initially diagnosed as having an intrauterine pregnancy. This women returned 1 week later with abdominal pain, and an ectopic pregnancy with intra-abdominal bleeding was found. Ectopic pregnancies were present in 5.6% (95% confidence interval 2.5%, 10.7%) of the women screened. This was significantly lower than reported in a previous study. CONCLUSION: The ectopic pregnancy rate in the population that was offered screening was low. Thus, it is questionable whether the possible benefits (prevention of complications and reassurance of the woman) outweigh possible detriments (false-positive diagnosis, financial costs, and emotional stress that could be induced by screening.

Chorionic Gonadotropin↗
PubMed1997

Is conservative surgery for tubal pregnancy preferable to salpingectomy? An economic analysis.

OBJECTIVE: The traditional treatment of ectopic pregnancy is salpingectomy, while conservative surgery aims to save the function of the uterine tube. This study compares the effectiveness and the economic costs of salpingectomy and conservative tubal surgery in women with a tubal pregnancy. METHODS: Salpingectomy and conservative tubal surgery were compared economically, based on a combined retrospective and prospective cohort study and a review of the literature. A model was developed in which conservative surgery and salpingectomy with in vitro fertilisation and embryo-transfer (IVF-ET) were compared with salpingectomy alone. PARTICIPANTS: One hundred and fifteen consecutive women treated laparoscopically for tubal pregnancy. MAIN OUTCOME MEASURES: Complete removal of the tubal pregnancy; subsequent intrauterine pregnancy rate; economic analysis. RESULTS: Tubal pregnancy was always treated successfully by both methods, sometimes with additional treatment for persistent trophoblast. In the short term costs per patient were 1554 pounds (95% confidence interval [CI] 1501 pounds-1656 pounds) for salpingectomy and 1787 pounds (95% CI 1683 pounds-1930 pounds) for conservative surgery. The mean difference between costs of salpingectomy and costs of conservative surgery was 233 pounds (95% CI 80 pounds-371 pounds). Concerning subsequent intrauterine pregnancy, conservative surgery is slightly more effective than salpingectomy but is more expensive. Costs per subsequent intrauterine pregnancy are 4063 pounds. If IVF-ET is performed in all women who are not pregnant within three years after salpingectomy, costs per subsequent intrauterine pregnancy are 15,629 pounds. CONCLUSIONS: Salpingectomy is the treatment of choice in women not desiring future pregnancy. Salpingectomy seems less effective than conservative surgery when future pregnancy is desired, but is less costly. Conservative surgery seems more cost effective than salpingectomy with additional IVF-ET.

Cohort Studies↗
PubMed1997

An economic evaluation of laparoscopy and open surgery in the treatment of tubal pregnancy.

BACKGROUND: Laparoscopy has generally replaced open surgery in the treatment of ectopic pregnancy. This study assesses the impact of the introduction of laparoscopy in the surgical treatment of tubal pregnancy on costs. METHODS: Consecutive patients undergoing primary surgery for tubal pregnancy between January 1992 and December 1995 were included in the study. Surgery was performed laparoscopically or by open surgery. Cost for each treatment was calculated by multiplying resources used with calculated resource unit prices. The analysis was stratified for radical and conservative surgery. RESULTS: Data of 255 patients were analysed. Tubal pregnancy was successfully treated in all patients. Costs per patient were US$ 3,490 for radical open surgery, US$ 1,872 for radical laparoscopic surgery, US$ 3420 for conservative open surgery and US$ 2,125 for conservative laparoscopic surgery. Differences in costs were caused by a decreased duration of hospital stay after laparoscopy, and, in case of conservative surgery, by an increased persistent trophoblast rate after laparoscopy. CONCLUSIONS: Laparoscopy is equally effective as open surgery in the treatment of tubal pregnancy, and considerably reduces costs.

Adult↗
PubMed1996

[Diagnosis and treatment of extrauterine pregnancy in The Netherlands].

OBJECTIVE: To inventory current policy in the diagnosis and treatment of ectopic pregnancy (EP) in the Netherlands. DESIGN: Questionnaire. SETTING: Academic Medical Centre, Amsterdam, the Netherlands. METHODS: A questionnaire was sent to all I30 departments of gynaecology in the Netherlands. RESULTS: The response rate was 94% (n = 122). Transvaginal ultrasonography was very widely used, whereas results of serum hCG measurements were only available within 24 h in 75% of the departments. Eighty-three per cent of the respondents screen for EP in high-risk patients. Laparoscopic surgery was used in 62% of the departments, open surgery in 9%, whereas in 28% the surgical technique depended upon the skills of the operating gynaecologist. If desire for pregnancy was present, 53% of the departments operated always conservatively, 2% always radically, whereas in 43% conservative surgery was performed only in case of a healthy ipsilateral tube. Methotrexate was used in 38% of the departments for persistent trophoblast, in 16% as primary treatment of interstitial pregnancies and in 13% as primary treatment for tubal pregnancy. CONCLUSION: Diagnostic strategies for EP in the Netherlands are homogeneous and in conformity with the state of the art in the literature. For treatment, laparoscopic techniques are widely used. In almost all departments, conservative surgery is the treatment of choice. Use of methotrexate is so far limited to treatment of persistent trophoblast after a failure of conservative surgery.

Chorionic Gonadotropin↗
PubMed1996

Interstitial laser treatment of the ovary: an experimental study in goats.

BACKGROUND AND OBJECTIVE: Interstitial laser treatment (ILT) of the ovary might be a new surgical approach to restore ovulation with a minimal risk of adhesion formation in patients with chronic hyperandrogenic anovulation who are unresponsive to hormone therapy. The objective was to investigate the feasibility of inducing a lesion limited to the center of the ovary in an animal model. STUDY DESIGN/MATERIALS AND METHODS: ILT was performed in seven goats using Nd:YAG laser in combination with ultrasound monitoring. The extent of direct thermal damage was investigated in two goats, treating both ovaries during a laparotomy at 2, 4, 6, and 8 W, respectively, for 5 min. Adhesion formation was evaluated in five goats 81 days after an unilateral laparoscopic ILT at 1, 2, 4, 6, or 8 W for 5 min. During treatment temperatures on the surface of the ovary were measured. RESULTS: Histology after 1 day showed sharply demarcated necrotic lesions located centrally or subcapsularly at low powers, whereas at higher powers the lesions extended to the surface of the ovary. At low powers no adhesions were observed, whereas higher powers resulted in periovarian adhesions. Temperatures measured on the ovarian surface during treatment ranged between 38 degrees C and 90 degrees C. Ultrasound monitoring of the extent of thermal damage failed due to poor positioning. CONCLUSION: Although this pilot study does not warrent firm conclusions, the results indicate that ILT of the ovary is feasible and that lesions without adhesions can be produced at low powers. The use of ultrasound to monitor the extent of thermal damage in the ovary should be a subject of further evaluation.

Aluminum Silicates↗
PubMed1996

The reproducibility of the results of transvaginal sonography of the uterus in patients with abnormal uterine bleeding.

Our objectives were to determine the reproducibility, or interobserver agreement, of transvaginal sonographic imaging of the uterus in patients with abnormal uterine bleeding and to identify the effect of observer experience. Transvaginal ultrasound findings of 235 patients with abnormal uterine bleeding were recorded systematically on videotape. Recordings were reviewed by three observers who had different levels of experience, and who were asked to judge the endometrium/uterine cavity and myometrium separately as being normal, abnormal or inconclusive, according to predefined criteria. Reproducibility was expressed by the observed rates of interobserver agreement and by kappa statistics. The differences in agreement between observer pairs were analyzed by means of McNemar's chi 2 test. The observed rates of agreement for the judgement of the endometrium/uterine cavity varied from 0.85 to 0.89, with a kappa value ranging from 0.70 to 0.78 between observers. The judgment of the myometrium resulted in agreement rates of 0.86-0.91 and kappa values of 0.67-0.80. Although the effect of experience was evident, the differences in agreement between observers were not significant (p > 0.01). The reproducibility of the results of transvaginal sonography of the uterus in patients with abnormal uterine bleeding was good. Observations of the endometrium/ uterine cavity with a normal appearance were the most highly reproducible, with the smallest effect of observer experience. This may reduce the need for invasive diagnostic procedures in patients with abnormal uterine bleeding.

Adult↗