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The Journal of Bone and Joint Surgery, Vol 76, Issue 6 801-806, Copyright © 1994 by Journal of Bone and Joint Surgery, Inc
The hospital cost and the cost of the implant for total knee arthroplasty. A comparison between 1983 and 1991 for one hospital
WL Healy and D Finn
Department of Orthopaedic Surgery, Lahey Clinic, Burlington, Massachusetts 01805.
The hospital cost of total knee arthroplasty at the Lahey Clinic was
evaluated by a comparison of the data for twenty-eight patients who had had
the operation in 1983 with the data for forty-two patients who had had the
same operation in 1991. The hospital bills were analyzed for each patient.
Each hospital charge was converted to cost with the use of
government-mandated hospital-specific cost-to-charge ratios. The average
actual hospital cost for total knee arthroplasty increased 17 per cent,
from $10,122 in 1983 to $11,826 in 1991. However, in inflation-adjusted
dollars, the hospital cost for total knee arthroplasty decreased 15 per
cent during this period. When the costs for total knee arthroplasty in 1983
and 1991 were allocated to various service centers in the hospital, the
cost for a hospital room was found to have decreased from 47 per cent of
the hospital cost in 1983 to 31 per cent of that in 1991. The cost of a
hospital room decreased 23 per cent in actual dollars and 46 per cent in
inflation-adjusted dollars during this period. In sharp contrast, the cost
of a knee implant increased from 13 per cent of the hospital cost for total
knee arthroplasty in 1983 to 25 per cent of that in 1991. The average cost
of the prosthesis increased from $1359 in 1983 to $2960 in 1991. This
represents a 118 per cent increase in actual dollars. The
inflation-adjusted increase in the cost of the implant was 59 per
cent.(ABSTRACT TRUNCATED AT 250 WORDS)
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