Table 1 Values of the diagnostic parameters based on physical examination, transanal ultrasonography and manometry in the study groups.
From: Non-invasive obstetric anal sphincter injury diagnostics using impedance spectroscopy
Diagnostic technique | Diagnostic parameter | Result | Number of patients in groups | |
|---|---|---|---|---|
A | B | |||
Physical examination | Sphincter tension | Correct | 0 | 12 |
Reduced | 10 | 0 | ||
Pathologies on the anoderm | Absent | 10 | 10 | |
Present | 0 | 2 | ||
Pathologies in the anal canal | Absent | 10 | 7 | |
Present | 0 | 5 | ||
Pathologies in the rectal mucosa | Absent | 10 | 6 | |
Present | 0 | 6 | ||
Active sphincter contraction | Correct | 1 | 11 | |
Reduced | 9 | 1 | ||
Sphincter continuity | Preserved | 10 | 12 | |
Not preserved | 0 | 0 | ||
Endoanal USG | Up to 50% of the external sphincter torn | Yes | 10 | 0 |
No | 0 | 12 | ||
More than 50% of the external sphincter torn | Yes | 5 | 0 | |
No | 5 | 12 | ||
Presence of internal sphincter torn | Yes | 4 | 0 | |
No | 6 | 12 | ||
Anorectal manometry | Average resting pressure | Correct | 2 | 12 |
Reduced | 8 | 0 | ||
Maximal contraction pressure | Correct | 1 | 11 | |
Reduced | 9 | 1 | ||
Duration of effective contraction | Correct | 7 | 12 | |
Shortened | 3 | 0 | ||
