en.wikipedia.org/wiki/Valsalva_maneuver
1 correction found
values > 60 cm H2O are commonly considered to indicate hypermobility of the bladder neck and normal sphincter function.
Standard urodynamic references do not treat all values above 60 cm H2O as indicating bladder-neck hypermobility or normal sphincter function. Values from 60 to 90 cm H2O are commonly considered equivocal; values above 90 cm H2O are the range more typically associated with urethral hypermobility/sphincter competence.
Full reasoning
This sentence overstates the cutoff.
Authoritative urodynamic terminology from the International Continence Society defines Valsalva leak point pressure (VLPP) as follows:
- <60 cm H2O: thought to represent intrinsic sphincter deficiency
- 60–90 cm H2O: equivocal
- >90 cm H2O: suggests sphincter competence / the need to look for other causes such as urethral hypermobility
A current StatPearls review states the same thresholding, listing VLPP <60 cm H2O for intrinsic sphincter deficiency and >90 cm H2O for urethral hypermobility.
So the article's claim that values greater than 60 cm H2O are commonly taken to indicate hypermobility and normal sphincter function is inaccurate because it collapses the widely used 60–90 cm H2O equivocal range into the hypermobility category.
2 sources
- ICS | Abdominal Leak Point Pressure / Valsalva Leak Point Pressure
Valsalva leak point pressure (VLPP) ... less than 60cmH2O is thought to represent intrinsic sphincter deficiency, VLPP of 60-90cmH2O is said to be equivocal and VLPP more than 90cmH2O suggests sphincter competence.
- Urodynamic Testing and Interpretation - StatPearls - NCBI Bookshelf
Valsalva leak point pressure (VLPP): <60 cm H2O: ISD ... >90 cm H2O: urethral hypermobility.