Uroflow Nomogram for Male Adolescents

Pernkopf, Dominik; Plas, Eugen; Lang, Thomas; Daha, Kurosch; Kubin, K.; Treu, Thomas; Pflüger, Heinz

doi:10.1097/01.ju.0000173694.86127.ae

Cited by 25 publications

(21 citation statements)

References 10 publications

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“…Qmax values in our population of adult males was 22.8 ml/sec, which is lower than 28.4 ml/sec and 31.2 ml/sec in the Austrian male adolescent and Thai population, respectively. [1415] Qmax values in the elderly population were 17.04 ml/sec significantly lower than the study in the Thai population (27.5 ml/sec). [15]…”

Section: Discussionmentioning

confidence: 82%

Age, gender, and voided volume dependency of peak urinary flow rate and uroflowmetry nomogram in the Indian population

Kumar¹,

Dhabalia²,

Nelivigi³

et al. 2009

Indian J Urol

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Objectives:The objective of this study was measurement of urine flow parameters by a non invasive urodynamic test. Variation of flow rates based on voided volume, age, and gender are described. Different nomograms are available for different populations and racial differences of urethral physiology are described. Currently, there has been no study from the Indian population on uroflow parameters. So the purpose of this study was to establish normal reference ranges of maximum and average flow rates, to see the influence of age, gender, and voided volume on flow rates, and to chart these values in the form of a nomogram.Methods:We evaluated 1,011 uroflowmetry tests in different age groups in a healthy population (healthy relatives of our patients) 16-50 year old males, >50 year old males, 5-15 year old children, and >15 year pre-menopausal and post-menopausal females. The uroflowmetry was done using the gravitimetric method. Flow chart parameters were analyzed and statistical calculations were used for drawing uroflow nomograms.Results:Qmax values in adult males were significantly higher than in the elderly and Qmax values in young females were significantly higher than in young males. Qmax values in males increased with age until 15 years old; followed by a slow decline until reaching 50 years old followed by a rapid decline after 50 years old even after correcting voided volume. Qmax values in females increased with age until they reached age 15 followed by decline in flow rate until a pre-menopausal age followed by no significant decline in post-menopausal females. Qmax values increased with voided volume until 700 cc followed by a plateau and decline.Conclusions:Qmax values more significantly correlated with age and voided volume than Qavg. Nomograms were drawn in centile form to provide normal reference ranges. Qmax values in our population were lower than described in literature. Patients with voided volume up to 50 ml could be evaluated with a nomogram.

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Section: Discussionmentioning

confidence: 82%

Age, gender, and voided volume dependency of peak urinary flow rate and uroflowmetry nomogram in the Indian population

Kumar¹,

Dhabalia²,

Nelivigi³

et al. 2009

Indian J Urol

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“…3 Qmax is largely dependent on the volume voided and, thus, nomograms have been developed to establish expected flow rates in pediatric populations. [3][4][5][6][7][8][9][10] Unfortunately, values have not been established for early adolescent boys. This is of particular interest as urethral development is prominent during early puberty.…”

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confidence: 99%

Long-Term Urethral Function Measured by Uroflowmetry After Hypospadias Surgery: Comparison with an Age Matched Control

et al. 2012

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At long-term followup after hypospadias surgery urinary flow rates were significantly lower compared to age matched controls but still fell within the normal range. In the hypospadias cohort there was no significant association with lower urinary tract symptoms and poor urinary flow. Detection of poor urinary flow may indicate incomplete bladder emptying. The presence of severe chordee preoperatively is a significant risk factor for poor urinary flow rates on long-term followup.

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“…Pernkopf et al . () also found a positive correlation between the two up to a VV of 350 mL in an adolescent population (Pernkopf et al ., ), followed by plateau to 500 mL and then a decline (Von Garrets, ; Chancellor et al ., ; Kumar et al ., ). Likewise, in the present study, the factors found to affect pre‐operative and post‐operative Qmax most significantly were pre‐operative and post‐operative VV respectively (Tables and ).…”

Section: Discussionmentioning

confidence: 78%

Second to fourth digit ratio and lung function (forced vital capacity): predictors of maximum urinary flow rate after holmium laser enucleation of the prostate

Park

2018

Andrology

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Background: Maximum urinary flow rate (Qmax) is usually increased after holmium laser enucleation of the prostate (HoLEP). However, improvements vary between patients and results regarding potential predictors of Qmax after HoLEP are inconsistent. Thus, we investigated pre-operative variables including second to fourth digit ratio (digit ratio) and pulmonary function test (PFT) findings as potential predictors of Qmax after HoLEP. Methods: One hundred and ninety-five consecutive patients with benign prostatic hyperplasia (BPH) who underwent HoLEP were enrolled. Before HoLEP, PFTs were performed and lengths of second and fourth digits of right hands were measured by a single investigator using a digital vernier caliper. To identify independent predictors of Qmax after HoLEP, univariate and multivariate analyses were performed using linear regression models. Results: Mean age and total prostate volume for all 195 study subjects were 69.4 years and 63.3 mL respectively. Mean pre-operative and post-operative Qmax values were 8.7 and 26.2 mL/sec respectively. Univariate analysis showed age (r = À0.181, p = 0.014), digit ratio (r = 0.213, p = 0.004), lung function (forced vital capacity (FVC): r = 0.218, p = 0.005; forced expiratory volume in 1 sec (FEV1): r = 0.166, p = 0.034), pre-operative Qmax (r = 0.264, p = 0.000), pre-operative voided volume (VV) (r = 0.158, p = 0.033), and post-operative VV (r = 0.311, p = 0.000) were associated with post-operative Qmax, whereas multivariate analysis showed that digit ratio (b = 0.285, p = 0.001), FVC (b = 0.340, p = 0.039), and post-operative VV (b = 0.301, p = 0.000) independently predicted postoperative Qmax. Conclusions: The independent predictors of Qmax after HoLEP were digit ratio and lung function (FVC) as well as post-operative VV. This means that the higher a man's digit ratio and lung function (FVC), the higher his Qmax after HoLEP.

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Uroflow Nomogram for Male Adolescents

Abstract: Voiding volumes in a large homogenous adolescent group demonstrated optimal Qmax at voiding volumes between 350 and 550 cc with a decrease at higher volumes. Therefore, uroflow studies in adolescent males should be interpreted with caution at volumes less than 350 and more than 550 cc.

Cited by 25 publications

References 10 publications

Age, gender, and voided volume dependency of peak urinary flow rate and uroflowmetry nomogram in the Indian population

Age, gender, and voided volume dependency of peak urinary flow rate and uroflowmetry nomogram in the Indian population

Long-Term Urethral Function Measured by Uroflowmetry After Hypospadias Surgery: Comparison with an Age Matched Control

Second to fourth digit ratio and lung function (forced vital capacity): predictors of maximum urinary flow rate after holmium laser enucleation of the prostate

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