Table 2

WON characteristics and procedural details

LAMS
(n=31)
Plastic
(n=29)
P values
WON location: n (%)
 Head/uncinate9 (29.0)6 (20.7)0.456
 Body/tail22 (71.0)23 (79.3)
Degree of necrosis (%):
 Mean (SD)40.3 (15.7)45.3 (14.4)0.173
 Median4050
 IQR2020
 Range20–7020–80
WON size (cm): transverse axis
 Mean (SD)10.2 (4.6)10.7 (6.8)0.784
 Median9.27.8
 IQR5.67.1
 Range5.0–21.65.0–32.0
WON size (cm): anteroposterior axis
 Mean (SD)8.6 (4.3)7.8 (3.8)0.477
 Median8.06.0
 IQR5.93.3
 Range2.4–20.04.0–17.0
Route of drainage: n (%)
 Transesophageal01 (3.4)0.509
 Transgastric24 (77.4)24 (82.8)
 Transduodenal7 (22.6)4 (13.8)*
Additional drainage tracts at index procedure with nasocystic catheter placement: n (%)3 (9.7)9 (31.0)0.054
Pancreatic duct status: n (%)
 Intact PD9 (29.0)9 (31.0)0.363
 PD leak6 (19.4)2 (6.9)
 DPDS13 (41.9)17 (58.6)
 Unknown3 (9.7)1 (3.4)
Procedure duration (min):
 Mean (SD)18.0 (15.5)41.6 (25.7)
 Median1540<0.001
 IQR1728
 Range3–6310–115
Technical success: n (%)31 (100)29 (100)0.999
  • *One patient in the plastic stent group underwent drainage via both transgastric and transduodenal routes.

  • DPDS, disconnected pancreatic duct syndrome; LAMS, lumen-apposing metal stent; PD, pancreatic duct; WON, walled-off necrosis.