Table 1

Operative bilateral total knee arthroplasty (TKA) practices of Ontario’s orthopedic surgeons

Variable	Bilateral TKA practised; %

	Staged (2 anesthetics) n = 109	Sequential (1 anesthetic) n = 23	Simultaneous (1 anesthetic) n = 21
Year of graduation
1979 or earlier	58	48	62

1980 or later	42	52	38

Tourniquet use
Simultaneous	0	0	71

Sequential	100	100	29

Release of tourniquet
Before closure	54	57	50

After closure	46	43	50

Alignment system
Femur
Extramedullary	2	9	5

Intramedullary	98	91	95

Over-ream	73^*	90^*	90^*

Suction	50	70	55

Tibia
Extramedullary	68	77	67

Intramedullary	32	23	33

Over-ream	57	60	86

Suction	57	80	71

↵* p < 0.05.