We reviewed one hundred and seventeen knees of eighty patients who had primary total kn3ee arthroplasties between 1991 and 1993 at the Hanyang university hospital, Seoul, Korea, by a surgeon with a same procedure. We placed them in six groups; in
group
I, eight knees had all-cemented total knee arthroplasty with a degenerative osteoarthritis (OA), in group II, fifteen knees with hybrid type in OA, in group III, thirty three knees with patella-only-cemented type in OA, in group IV, eleven knees
withall-cemented type in rheumatoid arthritis(RA), in group V, twenty five knees with hybrid type in RA, and in group VI, twenty five knees with patella-only-cemented type in RA. Again, we divided them into two groups about application of tourniquet;
once or twice. We compared the total blood losses in each group.
1. The mean age and calculated blood volume of OA groups were sixty-two year, 3,584ml and those of RA were forty-seven years, 3,491ml.
2. The total blood loss averaged 1,272ml (643ml - 2,147ml), and among the six groups, regardless the type of diseases and the use of cement, there was no significant difference in that amount, statistically(p>0.05).
3. The RA groups have lower Hb & Hct levels(11.2/33.6) than the OA groups(12.6/37.2) preoperatively. So the amounts of postoperatively transfused blood were 2.57 pints and 1.43 pints, respectively.
4. The one time inflation of tourniquet has more blood loss(1,307ml) than the two time(1,259ml).
5. The average blood loss by postoperative hemovac drain was 710ml (RA 700ml, OA 721ml).
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