The effect of a 6 Fr catheter on flow rate in men
Background: The pressure-flow study (PFS) is considered the gold standard for the detection of bladder outlet obstruction (BOO) in men. However, several studies have raised the possibility that transurethral catheterization might have an obstructive effect on PFS while others did not. Objectives: T...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2013-01-01
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| Series: | Urology Annals |
| Subjects: | |
| Online Access: | http://www.urologyannals.com/article.asp?issn=0974-7796;year=2013;volume=5;issue=4;spage=264;epage=268;aulast=Richard |
| _version_ | 1811295805504487424 |
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| author | Patrick Richard Nydia Icaza Ordonez Le Mai Tu |
| author_facet | Patrick Richard Nydia Icaza Ordonez Le Mai Tu |
| author_sort | Patrick Richard |
| collection | DOAJ |
| description | Background: The pressure-flow study (PFS) is considered the gold standard for the detection of bladder outlet obstruction (BOO) in men. However, several studies have raised the possibility that transurethral catheterization might have an obstructive effect on PFS while others did not.
Objectives: To evaluate the effect of a 6 Fr transurethral catheter on the pressure-flow study and to evaluate its clinical implication in men.
Materials and Methods: A retrospective chart review study of 515 men referred for an evaluation of lower urinary tract symptoms and who underwent an urodynamic study (UDS). Of those, 133 met our inclusion/exclusion criteria. Non invasive free-flow studies (NIFFS) were performed before every UDS. Cystometrogram and PFS were performed through a 6 Fr transurethral catheter.
Results: The maximal flow rate (Q max ) was significantly higher ( P < 0.001) in the NIFFS (15.0 mL/s (range 9.0-23.0)) than in the PFS (11.0 mL/s (range 7.0-18.5)). This difference became greater (18.5 mL/s (range 10.0-30.3) vs. 13.0 mL/s (range 6.0-25.0), in favor of the NIFFS) when we analyzed only the patients ( n = 34) who voided a similar volume. According to the International Continence Society (ICS) nomogram, the use of the PFS alone would have resulted in the upstaging of 14% of cases (10/71) in the overall population and 24% (4/17) in the sub-analyzed group.
Conclusion: A 6 Fr transurethral catheter significantly lowers the maximal flow rate by 4 mL/s. Its presence resulted in an upstaging on the ICS nomogram. However, further studies will be necessary to confirm this upstaging. |
| first_indexed | 2024-04-13T05:38:59Z |
| format | Article |
| id | doaj.art-ee5c3a58359d45b58abd7fa5c0b6ac05 |
| institution | Directory Open Access Journal |
| issn | 0974-7796 0974-7834 |
| language | English |
| last_indexed | 2024-04-13T05:38:59Z |
| publishDate | 2013-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Urology Annals |
| spelling | doaj.art-ee5c3a58359d45b58abd7fa5c0b6ac052022-12-22T03:00:11ZengWolters Kluwer Medknow PublicationsUrology Annals0974-77960974-78342013-01-015426426810.4103/0974-7796.120303The effect of a 6 Fr catheter on flow rate in menPatrick RichardNydia Icaza OrdonezLe Mai TuBackground: The pressure-flow study (PFS) is considered the gold standard for the detection of bladder outlet obstruction (BOO) in men. However, several studies have raised the possibility that transurethral catheterization might have an obstructive effect on PFS while others did not. Objectives: To evaluate the effect of a 6 Fr transurethral catheter on the pressure-flow study and to evaluate its clinical implication in men. Materials and Methods: A retrospective chart review study of 515 men referred for an evaluation of lower urinary tract symptoms and who underwent an urodynamic study (UDS). Of those, 133 met our inclusion/exclusion criteria. Non invasive free-flow studies (NIFFS) were performed before every UDS. Cystometrogram and PFS were performed through a 6 Fr transurethral catheter. Results: The maximal flow rate (Q max ) was significantly higher ( P < 0.001) in the NIFFS (15.0 mL/s (range 9.0-23.0)) than in the PFS (11.0 mL/s (range 7.0-18.5)). This difference became greater (18.5 mL/s (range 10.0-30.3) vs. 13.0 mL/s (range 6.0-25.0), in favor of the NIFFS) when we analyzed only the patients ( n = 34) who voided a similar volume. According to the International Continence Society (ICS) nomogram, the use of the PFS alone would have resulted in the upstaging of 14% of cases (10/71) in the overall population and 24% (4/17) in the sub-analyzed group. Conclusion: A 6 Fr transurethral catheter significantly lowers the maximal flow rate by 4 mL/s. Its presence resulted in an upstaging on the ICS nomogram. However, further studies will be necessary to confirm this upstaging.http://www.urologyannals.com/article.asp?issn=0974-7796;year=2013;volume=5;issue=4;spage=264;epage=268;aulast=RichardBenign prostatic hyperplasiabladder outlet obstructionmaximum flow ratepressure-flow study |
| spellingShingle | Patrick Richard Nydia Icaza Ordonez Le Mai Tu The effect of a 6 Fr catheter on flow rate in men Urology Annals Benign prostatic hyperplasia bladder outlet obstruction maximum flow rate pressure-flow study |
| title | The effect of a 6 Fr catheter on flow rate in men |
| title_full | The effect of a 6 Fr catheter on flow rate in men |
| title_fullStr | The effect of a 6 Fr catheter on flow rate in men |
| title_full_unstemmed | The effect of a 6 Fr catheter on flow rate in men |
| title_short | The effect of a 6 Fr catheter on flow rate in men |
| title_sort | effect of a 6 fr catheter on flow rate in men |
| topic | Benign prostatic hyperplasia bladder outlet obstruction maximum flow rate pressure-flow study |
| url | http://www.urologyannals.com/article.asp?issn=0974-7796;year=2013;volume=5;issue=4;spage=264;epage=268;aulast=Richard |
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