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Table 3 Frequency of presumed early recanalization following the consensus process, according to vasectomy occlusion technique and outcome in the fascial interposition trial and the cautery study.

From: Frequency and patterns of early recanalization after vasectomy

Vasectomy technique Early recanalization Vasectomy outcome Total
   Failurea n (%) Successb n (%) Indeterminatec n (%)  
FI trial      
LE      
  Yes 46 (87) 49 (15) 10 (31) 105 (25)
  No 7 (13) 282 (85) 22 (69) 311 (75)
  Total 53 (100) 331 (100) 32 (100) 416 (100)
LE and FI      
  Yes 20 (83) 20 (6) 1 (2) 41 (10)
  No 4 (17) 323 (94) 42 (98) 369 (90)
  Total 24 (100) 343 (100) 43 (100) 410 (100)
Cautery study      
EC      
  Yes 2 (100) 13 (7) 2 (40) 17 (9)
  No 0 (0) 177 (93) 3 (60) 180 (91)
  Total 2 (100) 190 (100) 5 (100) 197 (100)
TC and FI      
  Yes 0 (0) 0 (0) 0 (0) 0 (0)
  No 1 (100) 188 (100) 3 (100) 192 (100)
  Total 1 (100) 188 (100) 3 (100) 192 (100)
  1. FI = fascial interposition, LE = ligation and excision, EC = electrocautery, TC = thermal cautery
  2. a FI trial definition: 5 million or more motile sperm/mL at 14+ weeks or 100,000 sperm or more/mL with any motility at 26+ weeks. Cautery study definition: Not meeting success definition by 24 weeks or having more than 10 million sperm/mL at 12+ weeks
  3. b FI trial definition: Two consecutive azoospermic specimens taken at least two weeks apart. Cautery study definition: Less than 100,000 sperm/mL in two consecutive specimens taken at least two weeks apart.
  4. c Neither a success nor a failure.