02 pediatric uroflowmetry.pdf
TRANSCRIPT
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Received: November 7, 2011 Accepted: November 16, 2011Address correspondence to: Dr. Shang-Jen Chang, Division of Urology, Department ofSurgery, Buddhist Tzu Chi General Hospital, Taipei Branch, 289, Jianguo Road, Xindian,Taipei, TaiwanE-mail: [email protected]
Incont Pelvic Floor Dysfunct 2012; 6(1):9-12
Interpretation of Uroflowmetry and Post-Void Residual Urine in Children:
Fundamental Approach to Pediatric Non-neurogenic Voiding Dysfunction
Stephen Shei-Dei Yang, M.D.1,2, I-Ni Chiang, M.D.3,4, Shang-Jen Chang, M.D.1,2
Division of Urology1, Department of Surgery, Buddhist Tzu Chi General Hospital, Taipei Branch, Xindian, New Taipei, Taiwan; Department of Urology2,School of Medicine, Buddhist Tzu Chi University, Hualien, Taiwan; Division of Urology3, Department of Surgery, Keelung Hospital, Keelung, Taiwan;Department of Urology4, National Taiwan University Hospital, Taipei, Taiwan
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Fig. 1. The same figures using different scales.
Scale
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BC (%EBC)
Fig. 3. Maximal flow rate initially increases with the volume of urine in thebladder, then decreases at 150% of expected bladder capacity for age.
Pea
k flo
w r
ate
(mL/
sec)
60
50
40
30
20
10
050 100 150 200 250
Fig. 2. Artifact in uroflowmetry curves.
Artefact
mL/s 25
Flow
0
mL 500
Volume
0Time 00:00 00:20 00:40 01:00 01:20
Fig. 4. (A) Tower-shaped curve. (B) Staccato curve. (C) Interrupted curve.(D) Plateau curve.
mL/s 25
Flow
0mL 1000
mL/s 25
Flow
0
mL 500
mL/s 25
Flow
0
mL 1000
mL/s 25
Flow
0mL 1000
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Indications for invasive urodynamic study (UDS)q====rap==~===J=J
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Fig. 5. The post-void residual urine in children is dependent on the bladdercapacity (the volume of urine in the bladder when starting to void/expected bladder capacity for age).
Bladder capacity (%EBC)
Pos
tvoi
d re
sidu
al u
rine
(mL)
0.0 0.5 1.0 1.5 2.0 2.5 3.0
140
120
100
80
60
40
20
0
Void 1 Void 2
mL120
100
80
60
40
20
0
Fig. 6. Great variation in the post-void residual urine in consecutive voidings.
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Expected results of urodynamic findingsq=rap====~I=~==~
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