Table 2. The puncture time (up to 20 min) was defined as the time from the start of puncture to fluoroscopic confirmation of the flow of contrast medium into the joint cavity.

	Within 2 min	Within 5 min	Within 10 min	Over 10 min
LPT	0	1	0	4
ASPT	3	6	3	1
AIPT	0	0	0	3

LPT, lateral puncture technique; ASPT, anterosuperior puncture technique; AIPT, anteroinferior puncture technique