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Use of urinary bladder measurements from a point‐of‐care cysto‐colic ultrasonographic view to estimate urinary bladder volume in dogs and cats
Author(s) -
Lisciandro Gregory R.,
Fosgate Geoffrey T.
Publication year - 2017
Publication title -
journal of veterinary emergency and critical care
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.886
H-Index - 47
eISSN - 1476-4431
pISSN - 1479-3261
DOI - 10.1111/vec.12670
Subject(s) - medicine , cats , ultrasound , urinary bladder , urinary system , volume (thermodynamics) , urine , urology , point of care ultrasound , urine specific gravity , nuclear medicine , anesthesia , radiology , anatomy , physics , quantum mechanics
Abstract Objective To develop a point‐of‐care ultrasound‐derived formula to estimate urinary bladder volume noninvasively in dogs and cats. Design Prospective case series. Setting Private 24‐hour veterinary emergency center. Animals Client‐owned dogs and cats requiring urethral catheterization. Interventions Ultrasound measurements of length, width, and height of balloons filled with known water volumes were used to develop a formula to estimate urinary bladder volume using linear regression. The formula was then applied to point‐of‐care ultrasound‐derived cysto‐colic view measurements, and calculations were compared to total aspirated urine volume. Measurements and Main Results Fifteen balloons with known volumes (median, 126 mL [range, 27–689 mL]) were used to identify length × width × height (cm) × 0.2 × π as the best formula to estimate urinary bladder volume in milliliters. Fourteen cats and 14 dogs were used for comparison of formula‐derived volume estimate to actual urinary bladder volume. Median aspirated urine volume, bias (formula‐derived minus actual aspirated), and percentage difference were 80 mL, –4.1 mL, and –6.6% for cats, respectively. For dogs, the results were 78 mL, 3.4 mL, and 3.6%, respectively. Conclusions and Clinical Relevance The point‐of‐care ultrasound‐derived formula may be useful to estimate urine volume noninvasively in dogs and cats.