Bed-side measurement of Vd/Vt has not been used clinically, because the measurement of Pico2 in using the Bohr equation is complicated and a time-consuming test. A new, simplified and time-saving, bed-side calculation of Vd/Vt by using the Radford nomogram has been developed. In order to verify the method of calculated Vd/Vt, we compared the two methods(measured versus calculated Vd/Vt) in 20 open heart patients. Two methods had direct correlationship(y=0.95X+0.04) with r=0.864, and so the authors considered that the calculating method in the measurement of Vd/Vt is advantageous in clinical use.
Heart ; Humans ; Nomograms

Sixteen normal subjects were tested with the Titmus stereotest varying the binocular Snellen's visual acuity from 1.0 to 0.2. From 15 possible combinations, a nomogram describing the relationship of binocular variations of Snellen's visual acuity and stereoacuity was constructed and the relationship of binocular isoacuities to Titmus stereotest performance was expressed as an S-shaped function.
Nomograms ; Telescopes ; Visual Acuity*

The uroflowmetry was accurate, noninvasive method in the assessment of infravesical obstruction, but it was difficult to differentiate normal from obstructed individuals. The use of the flow rate nomogram appeared to differentiate reliably normal from obstructed individuals. The uroflowmetries using flow rate nomogram which was previously reported by our hospital, were performed on 35 BPH patients, 12 patients preoperatively and postoperatively (Group I) and 23 patients postoperatively only due to preoperative urinary retention (Group 2). The following results were obtained. 1. In group 1, the mean preoperative maximal flow rate was 9.4 (ml/sec) and the mean postoperative maximal flow rate was 15.3 (ml/sec). 2. In group 2, the mean postoperative maximal flow rate was 18.3 (ml/sec) 3. In group 1, nine of twelve patients (75%) were improved in the maximal flow rate. But six of twelve patients (50% ) were improved in the flow rate nomogram. 4. In group 2, fourteen of twenty-three patients (70%) were improved in the flow rate nomogram. In summary, this study shows much difference in the results between maximal flow rate and flow nomogram. So uroflowmetry using flow rate nomogram, we consider, will show more objective result in the evaluation of prostatectomized patient.
Humans ; Nomograms* ; Prostatectomy* ; Urinary Retention

PURPOSE: Peak urinary flow rate is a widely used parameter in the diagnosis and evaluation of treatment erect of BPH because of its objectiveness and non-in vasiveness. The peak urinary flow rate, however is different with each voided volume in the same patient and tends to decrease even in an asymptomatic man with increasing ages. Therefore we need an adjusted peak urinary flow rate corresponding with the age and voided volume. This adjusted peak urinary flow rate can be used to evaluate the voiding function more easily in the same patient periodically or In the different patient of various voided volume and ages. MATERIALS AND METHODS: Data on age, volume voided and peak urinary flow rate were accumulated from 216 male aged from 10 to 80 who were free of voiding symptoms. All combinations of peak urinary flow rate, age and volume voided were tested for equation of bet fit by the least squares method with search for the equation providing least residual standard deviation with SAS package. RESULTS: When the peak urinary flow rate is defined as a function of age and voided volume, the equation is Q=35.01+0.086A-0.0031A2-1612/V(Q: peak urinary flow rate, A: age, V: voided volume). At the point of population means for volume voided(247.5ml) arid age(35.2) the reference peak urinary flow rate was 27.7m1/sec. Adjusted peak flow rate can be obtained by subtracting the difference between the measured and expected peak flow rate(expected minus measured) from the reference peak flow rate. To make the adjusted peak flow rate obtained easily with measured peak flow rate, age and voided volume nomogram that incorporates the equation has been designed. In our nomogram an adjusted peak flow rate < 19.9 ml/sec or > 1.3 standard deviation below mean should be considered suspicious for obstruction. CONCLUSIONS: Nomogram for adjusted peak flow rate that incorporates the age, voided volume and measured peak flow rate would be satisfactory for clinical use.
Diagnosis ; Humans ; Least-Squares Analysis ; Male* ; Nomograms

An accurate system for predicting the survival of patients with oral squamous cell carcinoma (OSCC) will be useful for selecting appropriate therapies. A nomogram for predicting survival was constructed from 96 patients with primary OSCC who underwent surgical resection between January 1994 and June 2003 at the Yonsei Dental Hospital in Seoul, Korea. We performed univariate and multivariate Cox regression to identify survival prognostic factors. For the early stage patients group, the nomogram was able to predict the 5 and 10 year survival from OSCC with a concordance index of 0.72. The total point assigned by the nomogram was a significant factor for predicting survival. This nomogram was able to accurately predict the survival after treatment of an individual patient with OSCC and may have practical utility for deciding adjuvant treatment.
Carcinoma, Squamous Cell ; Humans ; Korea ; Nomograms

The Korean 218 normal eyes, 74 myopic eyes and 42 glaucomatous eyes were examined. The intraocular pressure were measured by Goldmann applanation tonometer and Schiotz indentation tonometer using the 5.5 gm plunger load successively. The occular rigidity was estimated from Friedenwald 1955 nomogram. In normal eyes, the average coefficient of ocular rigidity was 0.0221 (standard deviation 0.0058, range 0.0032~0.0370). There was a statistically significant increase with age. It was higher in males than in females. But there was no statistically significant difference between sex. In myopic eyes. the average coefficient of ocular rigidity was 0.0189. There was an increase with refractive power but it was not statistically significant. In glaucomatous eyes. the average coefficient of ocular rigidity was 0.0181 in the medication-treated group and 0.0163 in the operated group. They were significantly lower than in normal eyes statistically. But there was no significant differance between medication-treated and operated groups.
Female ; Humans ; Intraocular Pressure ; Male ; Nomograms

OBJECTIVE: The purpose of this study is to verify the correlation between gestational sac volume (GSV) from automatic tracing mode the VOCAL-imaging program and gestational age and to construct the nomogram of gestational sac volume as the new biometric parameter in early pregnancy. METHODS: The cross-sectional study has been conducted in 242 uncomplicated singleton pregnancies. 47 cases were excluded due to early pregnancy failure, fetal malformations, elective abortion, age discrepancy, etc. In 195 uncomplicated singleton pregnancies from 5 to 12 weeks' menstrual age, gestational sac volume, mean sac diameter and crown-lump length were measured for the assessment of gestational age. Gestational sac volumetry was carried out with automatic method and manual method of the VOCALTM (Virtual Organ Computer- aided AnaLysis) for the comparison between two methods. The collected data were analyzed for mean, standard deviation, 90% reference interval, 5th, 50th and 95th percentiles of gestational sac volume, mean sac diameter and CRL, and the nomogram were constructed. RESULTS: Polynomial regression analysis demonstrated the statistically significant positive correlation between gestational age and gestational sac volume by automatic tracing mode (R2 0.826, p<0.001), gestational sac volume by manual tracing mode (R2 0.844, p<0.0001), mean sac diameter (R2 0.763, p<0.0001) and crown-lump length (R2 0.950, p<0.0001). The 5th, 50th and 95th percentiles of the gestational sac volume were calculated and the nomogram was tabulated. In determining gestational age, the standard deviation (SD) of gestational sac volume by automatic tracing mode is 5.6 days, the SD of gestational sac volume by manual tracing mode is 5.2 days and the SD of MSD is 6.6 days. CONCLUSION: we can conclude that three-dimensional GSV with automatic tracing mode of the VOCAL-imaging program can be used as the new biometric measurement in determining gestational age. Gestational sac volumetry with automatic tracing mode of the VOCAL-imaging program have been proven available and convenient method and it can be recommended in 5-7 weeks' of gestation, when CRL is not clearly visualized.
Cross-Sectional Studies ; Gestational Age* ; Gestational Sac* ; Nomograms ; Pregnancy

The flow rate nomogram was based on 204 flow rate measurements in l65 Korean normal men who ranged in age from 20 to 45 years. Using this nomogram, we tested 10 patients with clinically evident outflow obstruction by flowmetry. In 9 of the maximal flow measurements, the nomogram values were less than minus Z standard deviations. The maximal flow rate value after prostatectomy increased an average 2.41 standard deviations. (p=0.006) The use of flow rate nomogram appears to differentiate reliably normal from obstructed individuals and also is highly useful in the postoperative follow up of urinary outflow obstruction.
Follow-Up Studies ; Humans ; Male* ; Nomograms* ; Prostatectomy ; Rheology

PURPOSE: To determine the uroflow rates of normal Korean pediatric male, uroflowmetry was peformed. MATERIALS AND METHODS: A total of the 237 normal children who ranged in age from 2 to 14 years(mean: 7.2+/-2.1years)was available for this study. Uroflow 1 data(peak and average flow) were plotted in volume-related nomograms in 3 different age groups : 2 to 4, 5 to7 and 8 to 14 years old. RESULTS: The mean peak flow(10.3+/-3.7, 12.2+/-4.9 and 14.3+/-5.2m1/sec) and average flow(6.4+/-2.6, 7.1)3.0 and 8.3+/-3.4m1/sec) were increased significantly with increasing age(p<0.05). In a same voided volume the peak and average flow rates were not increased significantly with increasing age but, in a same age group they were significantly increased according to the volume voided (p<0.05). Peak and average flow rates in the circumcision group(13.7+/-6.7, 8.3+/-4.7m1/sec) was not significantly different from non-circumcision group(10.9+/-5.0, 16.1+/-3.0ml/sec). CONCLUSIONS: These uroflow rate nomograms will be useful for the assessment of voiding action related to the voided volume and age in Korean pediatric males.
Adolescent ; Child ; Circumcision, Male ; Female ; Humans ; Korea* ; Male* ; Nomograms*

The diagnostic methods of evaluating infravesical obstruction, especially in BPH, are based on symptoms, history, digital rectal examination, intravenous pyelography, ultrasonography, uroflowmetry and residual urine, etc. But these methods cannot accurately and objectively evaluate infravesical obstruction. We measured voiding cystometry with uroflowmetry and urethral pressure profile in 24 BPH patients by Dantec UD5500. We classified the degree of obstruction into obstructive, equivocal and nonobstructive types by Griffiths' obstructive nomogram and Type 0 - VI by Schaefer's nomogram after computer assisted pressure-flow analysis. Among 24 patients, obstructive type was in 12, equivocal type in 6, and nonobstructive type in 6 by Griffiths' obstructive nomogram. Based on Schaefer's nomogram, type 0 was in 4 patients, type I in 6, type III in 4, type IV in 2, type V in 4 and type VI in 4. In our analyzed urodynamic parameters, Qmax, Pdet, Pmuo, Atheo and URA had statistical significance(p<0.05). We consider Griffiths' obstructive nomogram and Schaefer's nomogram based on pressure flow plot are objective methods of accurately evaluating infravesical obstruction.
Digital Rectal Examination ; Humans ; Nomograms ; Ultrasonography ; Urodynamics ; Urography