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Table 1 Classification of fistula according to type of surgery required based on their anatomic/physiologic location [15]

From: Obstetric Fistula in Burundi: a comprehensive approach to managing women with this neglected disease

Fistula type or size

Sub-category

Description

Type I

 

Fistula not involving the closing mechanism

Type 11 A

 

Fistula without (sub)total urethral involvement

a

without circumferential defect*

b

with circumferential defect

Type 11 B

 

Fistula with (sub)total urethral involvement

a

without circumferential defect*

b

with circumferential defect

Type III

 

Miscellaneous, e.g. ureteric and other exceptional fistula

Small

 

<2 cm

Medium

 

23 cm

Large

 

45 cm

Extensive

 

6 or more cm

  1. * Circumferential defect: the complete separation of the urethra from the bladder.