Bladder capacity in infants

Fairhurst, Joanna; Rubin, Caroline; Hyde, I.; Freeman, N.V.; Williams, John D.

doi:10.1016/0022-3468(91)90426-t

Cited by 104 publications

(51 citation statements)

References 6 publications

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“…18 This may also be the case in our patient since 60 mL of contrast material was instilled during the first VCUG. According to the formulas specific for children under a year old [14][15][16][17] (Table 2), the estimated bladder capacity in our case would be as low as 42.2 mL (Fairhurst formula 15 ) and up to 58 mL (Holmdahl formula 16 ). However, using formulas proposed by Koff 12 and Keafer and colleagues 13 would largely overestimate these values (80-100 mL).…”

Section: Discussionmentioning

confidence: 89%

“…9 Although the bladder volume is well-studied in adults and older children, few studies have addressed this parameter in infants and children <2 years of age (Table 2). [12][13][14][15][16][17] Recently, Costa and colleagues 18 suggested that most formulas overestimate bladder capacity in infants. Using urodynamic data, they showed that the mean bladder capacity is about 48.9 ml in a 9-month-old infant -less than half the volume calculated using common formulas for this age.…”

Section: Discussionmentioning

confidence: 99%

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Bladder rupture after voiding cystourethrography: A case report and literature review on pitfalls and bladder volume estimation

Keihani

Kajbafzadeh

2015

CUAJ

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Voiding cystourethrography (VCUG) is a common diagnostic study in pediatric urology. Although generally considered a safe procedure, VCUG can incur some complications. Bladder rupture following VCUG is a very rare complication and mostly happens in the setting of unused bladders, previous surgeries, or underlying disease. The rupture is almost always intraperitoneal needing prompt surgical treatment. We present a unique case of extraperitoneal bladder rupture after VCUG in an 8-month-old boy. The rupture remained unnoticed and the patient recovered spontaneously without medical or surgical intervention. To the best of our knowledge, this is the first such case report in the English literature. The information provided may guide clinicians on the proper use of bladder volume formulas in children and also help them in getting a proper VCUG study.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Bladder rupture after voiding cystourethrography: A case report and literature review on pitfalls and bladder volume estimation

Keihani

Kajbafzadeh

2015

CUAJ

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“…The variation of the volume at which voiding is initiated, expressed as a percentage of EBC (0-3 years, 3-100 %) [17], might indicate that infants can postpone consciously voiding. Although, no significant correlation between bladder capacity and body weight was scrutinized in this review [7,13], Fairhurst et al1991 suggest the following equation to calculate EBC: EBC (ml) = [7× weight (kg)] − 1.2 with a 95 % CI from 5.4-8.5 ml/kg [9]. Even though this comparison was detected to be significant, the remark has to be made that this only explained 53 % of the variation in bladder capacity.…”

Section: Discussionmentioning

confidence: 98%

The voiding pattern in healthy pre- and term infants and toddlers: a literature review

et al. 2015

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“…As increasing weight in infants is a well-studied variable, Fairhurst and colleagues proposed the developed the formula [7 × weight (kg)] which gives a bladder capacity estimate in millilitres. 11 To define the weight of boys and girls at monthly intervals, the World Health Organiztion growth charts were used. The predicted 50th percentile weight at monthly intervals was employed to generate a bladder capacity estimate using the formula created by Fairhurst.…”

Section: Discussionmentioning

confidence: 99%

Are we accurately predicting bladder capacity in infants?

Costa

Lavallée

Dubois

et al. 2014

CUAJ

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Introduction: Estimating bladder capacity is an important component in the evaluation of many urological disorders. For estimates to be of clinical value, precise reference ranges are needed. While accepted reference ranges have been established in adults and older children, none have been validated in infants. We endeavour to determine the normal bladder capacity of children less than 1 year of age. Methods: We retrospectively reviewed the charts of children aged 0 to 12 months with cutaneous stigmata of spinal dysraphism who were referred to the urology clinic to rule out tethered cord between October 2004 and July 2011. Patients with normal urologic assessment, who did not have surgery during the time they were followed, were included in the study cohort. Urodynamic studies were performed using the Laborie Medical Technologies UDS-600. Bladder filling occurred via a catheter at a rate of 10% of the expected total bladder capacity/minute. Bladder capacity was defined as the volume of filling when the child voided around the catheter. We collected data, including age at urodynamics, bladder capacity, detrusor pressure at capacity, bladder compliance and length of follow-up. Result: In total, 46% (84/183) of patients had a normal urologic assessment and met the inclusion criteria. The median age was 9.0 months (interquartile range [IQR] 6.8-11.0). The average bladder capacity was 48.9 mL (standard deviation [SD] 32.8) and the mean detrusor pressure at capacity was 8.5 cmH 2 O (SD 10.0). Mean compliance was 14.1 mL/cmH 2 O (SD 13.6). The average length of follow-up was 40.7 months (SD 26.2) and during this interval no patients were found to have urologic or neurologic abnormalities and none underwent tethered cord release. Conclusion: Bladder capacity in infants with a median age of 9.0 months was found to be 48.9 mL. This is less than half of the volume predicted by a commonly employed formula. A novel method of estimating bladder capacity in infants is required.

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Bladder capacity in infants

Cited by 104 publications

References 6 publications

Bladder rupture after voiding cystourethrography: A case report and literature review on pitfalls and bladder volume estimation

Bladder rupture after voiding cystourethrography: A case report and literature review on pitfalls and bladder volume estimation

The voiding pattern in healthy pre- and term infants and toddlers: a literature review

Are we accurately predicting bladder capacity in infants?

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