OBJECTIVES: This research used queueing theory to analyze changes in outpatients' waiting times before and after the introduction of Electronic Medical Record (EMR) systems. METHODS: We focused on the exact drawing of two fundamental parameters for queueing analysis, arrival rate (λ) and service rate (µ), from digital data to apply queueing theory to the analysis of outpatients' waiting times. We used outpatients' reception times and consultation finish times to calculate the arrival and service rates, respectively. RESULTS: Using queueing theory, we could calculate waiting time excluding distorted values from the digital data and distortion factors, such as arrival before the hospital open time, which occurs frequently in the initial stage of a queueing system. We analyzed changes in outpatients' waiting times before and after the introduction of EMR using the methodology proposed in this paper, and found that the outpatients' waiting time decreases after the introduction of EMR. More specifically, the outpatients' waiting times in the target public hospitals have decreased by rates in the range between 44% and 78%. CONCLUSIONS: It is possible to analyze waiting times while minimizing input errors and limitations influencing consultation procedures if we use digital data and apply the queueing theory. Our results verify that the introduction of EMR contributes to the improvement of patient services by decreasing outpatients' waiting time, or by increasing efficiency. It is also expected that our methodology or its expansion could contribute to the improvement of hospital service by assisting the identification and resolution of bottlenecks in the outpatient consultation process.
Delivery of Health Care ; Electronic Health Records ; Hospitals, Public ; Humans ; Outpatients

Uterine anomalies have been reported in 4% of women with infertility and in up to 15% of those with recurrent abortion. One of the major intrauterine disorder associated with infertility and recurrent abortions is intrauterine septum, The reproductive outcome of 41 patients of intrauterine septum (7 complete, 34 incomplete) with repeated abortions or infertility was assessed after the uterine septotomy. 5 of 7 patients with comlete uterine septum undergone uterine septotomy (3; hysteroscopic metroplasty, 2; abdominal metroplasty) had total 6 pregnancies and all of them had live biths. 28 patients with incomplete uterine septum got the hysteroscopic intrauterine septotomy and the viable pregnancy rate was 62% (3 ongoing pregnancies, 13 live biths of total 26 pregnancies). 6 patients with incomplete uterine septum had not the operation and 5 patients had 5 live births after total 6 pregnancies with 1 spontaneus abortion. Even though, the number of cases were small, the live birth rate in the group of septotomy of the patients of complete uterine septum (100%, 6/6) was higher than that in the group of not-done (50%, 1/2). The live birth rate in the group of not-done of the patients with incomplete uterine septum (83%, 5/6) was higher than that in the group of hysteroscopic uterine septotomy (62%, 16/26), but 5 of 6 had short uterine septal length (<1 cm), 1 had 1.5 cm septal length in the group of not-done. All the patients with successful pregnancy outcome had no other co-factors at the diagnostic laparoscopy, but the 5 primary infertility patients with no live birth even after treatment (all were with incomplete septum; 3 undergone hysteroscopic septotomy, 2 not-done with one abortion) had other co-factors such as endometriosis, peritoneal or tubal facor. In conclusion, hysteroscopic uterine septotomy would be useful for the patients with habitutal abortion or infertility and more advanced managemnet protocols should be applied to the patients having other co-factors if there was no pregnancy even after the uterine septotomy.
Abortion, Habitual* ; Endometriosis ; Female ; Humans ; Hysteroscopy* ; Infertility* ; Laparoscopy ; Live Birth ; Pregnancy ; Pregnancy Outcome ; Pregnancy Rate

OBJECTIVE: The aim of study was to evaluate the efficacy of medical and/or laparoscopic surgical treatment for improvement of reproductive outcome of in vitro fertilization and embryo transfer (IVF-ET) in the patients with endometriosis. METHODS: 296 IVF-ET cycles except 18 cycles of cancelled embryo-transfer (unfertilization; 16 cycles, high risk of ovarian hyperstimulation syndrome; 2 cycles) in 191 infertile women with endometriosis from January 1, 1995 to December 31, 1998 were included in this study. All women's ages were < or = 35 and the factor for infetility was endometriosis only and day 3 follicle stumulating hormone (FSH) level of all the cycles was < or = 10 mIU/ml in this study. All the baseline study about infertility was done before initiating treatment of infertility. The stage of endometriosis was recorded during diagnostic laparoscopy by WHO critera. Medical treatment (GnRH agonist or danazole) or laparoscopic surgery was done independently or combinedly by the physician's decision according to the disease entity and symptoms. Short or long protocols were used for controlled ovarian hyperstimulation and 3 day embryos were transferred (maximally 4 embryos) by standard procedures in our institute. We classified the cases as 4 groups : group 1 (without pre-treatment, 80 cycles), goup 2 (laparoscopic surgery only, 37 cycles), group 3 (medication only, 140 cycles), group IV (combined pre-treatment, 39 cycles). RESULTS: The mean age (years old, mean +/- SEM) was 31.5 +/- 0.3 (group 1), 31.6 +/- 0.5 (group 2), 31.5 +/- 0.2 (group 3), 31.7 +/- 0.4 (group 4) respectively. The duration of infertility (months) was 57.7 +/- 3.3, 64.5 +/- 4.8, 59.1 +/- 1.9, 52.0 +/- 3.7 respectively among groups. The viable pregnancy rate (over 28 gestational weeks, VPR) was 12.5 % (10/80) in goup 1, 13.5 % (5/37) in goup 2, 14.3 % (20/140) in group 3, 30.8 % (12/39) in group 4 and there was statistically significant difference between group 1 and group 4 (P=0.03, Chi square test). The total used gonadotropins (ampules) for controlled ovarian hyperstimulation were 28.2 +/- 0.6.
Embryo Transfer ; Embryonic Structures ; Endometriosis* ; Female ; Fertilization in Vitro ; Gonadotropins ; Humans ; Infertility ; Laparoscopy* ; Ovarian Hyperstimulation Syndrome ; Pregnancy Rate* ; Pregnancy*

OBJECTIVE: Ovarian hyperstimulation syndrome (OHSS) is one of the well known complication of conttolled ovarian hyperstimulation. Though there have been numerous protocols for the prevention of OHSS, it has not been completely preventable until now. This study was performed to identify clinical predictors for early and late OHSS. METHODS: A retrospective analysis of all IVF cycles in 1993 up to June 1996 was performed. OHSS was diagnosed using the criteria of Rabau modified by Schenker. All cases of OHSS reported in this study presented with marked ovarian enlargement, ascites, oliguria, hemoconcentration and electrolyte disturbance. Ovarian stimulation was carried out using a combination of gonadotrophin releasing hormone-agonist, follicle-stimulation hormone and human menopausal gonadotrophin. 27 patients has moderate or severe OHSS presenting 3-7 days post-human chorionic gonadotrophin (hCG), and 21 patients had severe OHSS presenting 12-17 days post-hCG. RESULTS: No patient with early OHSS went onto develop late OHSS, and no patient with late OHSS had demonstrated early OHSS. Logistic regression showed that early OHSS was predicted by the number of oocytes retrieved and the estradiol concentration on the day hCG injection (P<0.05). Late OHSS was predicted by the transferred embryos, B-hCG on 14 day after hCG injection (P<0.05). CONCLUSION: Early OHSS was an acute effect of the hCG administered prior to egg retrieval in women with high estradiol and large number of retrieved oocytes. Our analysis of the risk factors for early OHSS indicates that cryopreservation of all embryos will not alter the risk of early OHSS even though it should prevent late OHSS. Late OHSS was induced by the rising serum concentration of hCG produced by the early pregnancy, the number of transferred embryos must be adjusted carefully, since it was associated with multiple gestation.
Ascites ; Chorion ; Cryopreservation ; Embryonic Structures ; Estradiol ; Female ; Humans ; Logistic Models ; Oliguria ; Oocytes ; Ovarian Hyperstimulation Syndrome ; Ovulation Induction ; Ovum ; Pregnancy ; Retrospective Studies ; Risk Factors

OBJECTIVES: The aims of this study are 1) to determine if GAST is a better indicator in predicting ovarian response to COH compared with patient's age or basal FSH level and 2) to evaluate its role in detecting abnormal ovarian response. DESIGN : Prospective study in 118 patients undergoing IVF-ET using GnRH-a short protocol during May-September 1995. MATERIALS AND METHODS: After blood sampling for basal FSH and estradiol (E2) on cycle day two, 0.5 ml (0.525 mg) GnRH agonist (Suprefact, Hoechst) was injected subcutaneously. Serum E2 was measured 24 hours later. Initial E2 difference (deltaE2) was defined as the change in E2 on day 3 over the baseline day 2 value. Sixteen patients with ovarian cyst or single ovary or incorrect blood collection time were excluded from the analysis. The patients were divided into three groups by deltaE2; group A (n=30):deltaE2<40 pg/ml, group B (n=52): 40 pg/ml< or =deltaE2<100 pg/ml, group C (n=20): deltaE2< or =100 pg/ml. COH was done by GnRH agonist/HMG/hCG and IVF-EF was followed. Ratio of E2 on day of hCG injection over the number of ampules of gonadotropins used (E2hCGday/Amp) was regarded as ovarian responsiveness. Poor ovarian response and overstimulation were defined as E2 hCGday less than 600 pg/ml and greater than 5000 pg/ml, respectively. RESULTS: Mean age (+/-SEM) in group A, B and C were 33.7+/-0.8*, 31.5 +/-0.6 and 30.6+/-0.5*, respectively (*: p<0.05). Mean basal FSH level of group A (11.1+/-1.1 mIU/ml) was significantly higher than those of B (7.4+/- 0.2 mIU/ml) and C (6.8+/-0.4 mIU/ml) 0<0.001). Mean E2hCGday of group A was significantly lower than those of group B or C, i.e., 1402.1+/-187.7 pg/ml, 3153.2+/- 240.0 pg/ml, 4078.8+/-306.4 pg/ml respectively (p<0.0001). The number of ampules of gonadotropins used in group A was significantly greater than those in group B or C: 38.6+/-2.3, 24.2+/-1.1 and 18.5+/-1.0 (p<0.0001). The number of oocytes retrieved in group A was significantly smaller than those in group B or C: 6.4+/-1.1, 15.5+/-1.1 and 18.6+/-1.6, respectively (p<0.0001). By stepwise multiple regression, only deltaE2 showed a significant correlation (r=0.68, p<0.0001) with E2HCGday/Amp, while age or basal FSH level were not significant. Likewise, only deltaE2 correlated significantly with the number of oocytes retrieved (r=0.57, p<0.001). All four patients whose COH was canceled due to poor ovarian response belonged to group A only (Fisher's exact test, p<0.01). Whereas none of 30 patients in group A (0%) had overstimulation, 14 patients among 72 patients (19.4%) in group B and C had overstimulation (Fisher's exact test, p<0.01). CONCLUSIONS: These data suggest that initial E2 difference after GAST may be a better prognostic indicator of ovarian response to COH than age or basal FSH level. Since initial E2 difference demonstrates significant association with abnormal ovarian response such as poor ovarian response necessitating cycle cancellation or overstimulation, GAST may be helpful in monitoring and consultation of patients during COH in IVF-ET cycle.
Estradiol ; Female ; Gonadotropin-Releasing Hormone* ; Gonadotropins ; Humans ; Oocytes ; Ovarian Cysts ; Ovary ; Ovulation Induction* ; Prospective Studies

BACKGROUND: In order to evaluate the effects of the duration of hemodialysis on cell mediated immunity, we studied cellular immune responses in vitro in 12 patients on chronic hemodialysis and in 6 healthy volunteers with normal kidney function. METHODS: The patients on maintenance hemodialysis were divided into two subgroups according to the duration of the hemodialysis: Group 1 (within 5 years, n=6) and Group 2 (>5 yr and < or =10 yr, n=6). Group 3 include the normal control (n=6). The peripheral blood lymphocytes of each group were cultured in RPMI medium 1640 without/or with 3 microgram of phytohemagglutinin (=PHA) for 7 days. RESULTS: CD4 /CD8 ratio at 48hours was totally comparable between the uremic patients (Group 1 and Group 2) and the controls (Group 3). The proportions of CD25 T lymphocytes after 48 hours culture were abnormally high: 7.1+/-0.5% and 7.0+/-1.3% in the uremic patients as compared to 2.5+/-0.6 in the normal controls at the basal state and 66.7+/-2.6% and 68.8+/-1.9% in the uremic patients as compared to 78.3+/-4.6% in the normal controls at the PHA-stimulated condition. The spontaneous production of IL-2 (mean pg SEM) was significantly lower in hemodialized patients (Group 1: 34.5+/-6.0 pg/ml, Group 2: 33.8+/-6.2 pg/ml) as compared to the normal patients (Group 3: 58.8+/-10.4 pg/ml). The PHA stimulated IL-2 production was also significantly reduced in the hemodialized patients (Group 1: 53.2+/- 13.3 pg/ml, Group: 53.0+/-10.3 pg/ml) as compared to the normal patients (Group 3: 150.0+/-24.5 pg/ml). The mean proliferative response to PHA at each point in the hemodialized patients were significantly lower than those of the controls. CONCLUSIONS: These data show that there is no significant correlation between the level of the cell mediated immune response and the duration of hemodialysis. Several defects in the cell mediated immune response associated with uremia might start at an early phase of the hemodialysis.
Healthy Volunteers ; Humans ; Immunity, Cellular* ; Interleukin-2 ; Kidney ; Kidney Failure, Chronic* ; Lymphocytes ; Renal Dialysis* ; T-Lymphocytes ; Uremia

PURPOSE: Amenorrhea and short stature are serious complications in patients with congenital adrenal hyperplasia of 21-hydroxylase deficiency(CAH). We analysed several factors influencing the presence of menarche and final adult height in these patients. METHODS: We retrospectively reviewed medical records of 24 female patients with CAH. We analysed possible factors affecting the menarche and final adult height, such as clinical type, predicted adult height, age at treatment, age at onset of puberty, BMI, and plasma levels of DHEA and 17-OHP. RESULTS: The occurrence rate of menarche were significantly higher in patients with the simple virilizing form rather than the salt losing form(P<0.05). No significant differences were found in age at onset of puberty, BMI, and plasma levels of DHEA and 17-OHP between menarche group and amenorrhea group. The age at treatment was younger in amenorrhea group(P<0.05). There were no significant differences in the proportion of patients who attained predicted adult height between two clinical types. No significant differences were found in age at treatment, age at onset of puberty, BMI, and plasma levels of DHEA and 17-OHP between the group of patients who attained predicted adult height and the group of patients who didn't. Final adult height did not show any correlation with age at treatment, age at onset of puberty, BMI, and plasma levels of DHEA and 17-OHP but showed significant correlation with mid-parental height(r=0.426, P=0.01). CONCLUSION: Our data suggest that the presence of menarche in patients with CAH depends on the degree of prenatal exposure to adrenal androgen regardless of the degree of postnatal control and age at onset of puberty. Additionally, it seems likely that mid-parental height determines the final adult height.
Adolescent ; Adrenal Hyperplasia, Congenital* ; Adult* ; Amenorrhea ; Dehydroepiandrosterone ; Female ; Female* ; Humans ; Medical Records ; Menarche* ; Plasma ; Puberty ; Retrospective Studies ; Steroid 21-Hydroxylase*

Purpose: To compare the fractal dimensions of the peripapillary microvasculature as obtained by optical coherence tomography angiography (OCTA) between primary open-angle glaucoma (POAG) and controls. Methods: Optic nerve head and peripapillary area images were taken using the 20° × 20°-scan of Spectralis OCTA (Heidelberg Engineering) in 97 subjects (64 POAG patients, 33 control patients). The optic nerve head microvasculature was evaluated according to predefined slabs: the superficial vascular complex (SVC) and the avascular complex (AVC). The en face image of each slab was processed by ImageJ software (National Institutes of Health) in order to calculate the vessel density and the fractal dimension using the box-counting method. For comparison, the peripapillary retinal nerve fiber layer (RNFL) thickness was obtained from Spectralis OCT circle scans. The utilities of the parameters for discriminating between the POAG and control groups were assessed using areas under the receiver operating characteristic curves (AUCs). Results: The SVC fractal dimension was lower in the POAG than in the control group (p < 0.001), while AVC showed no intergroup difference (p = 0.563). The fractal dimension showed a good correlation with the vessel density in both SVC and AVC (both p < 0.001). In a multivariable regression analysis, the SVC fractal dimension was negatively correlated with age (p < 0.001) and axial length (p < 0.001) and positively correlated with average RNFL thickness (p < 0.001), while the AVC fractal dimension was positively correlated with the Bruch’s membrane opening size (p = 0.013). In terms of diagnostic utility, the AUC was significantly larger for the average RNFL thickness (AUC, 0.889) than for the SVC fractal dimension (AUC, 0.772; p = 0.008). Conclusions The fractal dimension of SVC was associated with the average RNFL thickness and was reduced in POAG patients. Fractal dimension analysis could be used in evaluating peripapillary vascularity by OCTA.

PURPOSE: Anti-insulin antibodies develop within several months of initiation of insulin therapy in most of diabetic patients. The purpose of this study is to observe the relationship between the clinical factors and development of anti-insulin antibody METHODS: Serum was collected from 116 diabetic patients and 47 nondiabetic children for the measurement of anti-insulin antibody titer by radioimmunoassay (RIA). Retrospective analysis of the medical records of clinical factors were evaluated. RESULTS: There was no relationship of anti-insulin antibody titer with age, duration, HbA1c, insulin dose, and BMI in diabetic children. There was no difference in anti-insulin antibody titer according to the sex, the presence of family history, the presence of DKA, the presence of complications, the presence of puberty, species of insulin, duration of disease in diabetic children. The titers of anti-insulin antibody were significantly higher in type 1 diabetic children(30.3+/-17.9% in type 1 and 16.5+/-7.0% in type 2, P<0.05), in which the daily insulin doses were significantly higher than in type 2 DM patients. Additionally, anti-insulin antibody titers were significantly lower in well-controlled DM patients (HbA1c<7%), in which daily insulin doses also were significantly lower than in DM patients whose HbA1c>7%. The positive rates of anti-insulin antibody were higher in male patients with diabetes(73.2% in male and 53.3% in female, P<0.05). The positive rates of anti-insulin antibody were significantly higher in DM patients without diabetic ketoacidosis at DM onset than in DM patients with diabetic ketoacidosis at DM onset & also were higher in poorly-controlled group(HbA1c>7%). CONCLUSION: The results suggests that anti-insulin antibody developed more likely in type 1 DM and less likely in DM patients whose control had been good and who used less insulin doses, which remains to be studied further with more patients for longer duation.
Adolescent ; Antibodies ; Child* ; Diabetic Ketoacidosis ; Female ; Humans ; Insulin ; Male ; Medical Records ; Puberty ; Radioimmunoassay ; Retrospective Studies