Research Article

Autologous Blood Transfusion after Local Infiltration Analgesia with Ropivacaine in Total Knee and Hip Arthroplasty

Table 2

Comparison of studies in autotransfusion after LIA with ropivacaine.

CharacteristicPresent studyGill et al. [6]Breindahl et al. [7]Parker et al. [5]Stringer et al. [21]

Number of patients25 TKA,
27 THA
10 THA*20 TKA,
10 THA
20 TKA15 TKA,
20 THA
Autotransfusion performedYesYesNoYesNo
Ropivacaine dose for LIA (mg)200400200150360–400
Drainage blood volume (mL)93–977<125050–620300–70010–905
Drainage blood content of ropivacaine (mg)<7.2<60.28–12<2.60.53–27
Infusion rate (mg/h)0.42–120.7–4.7
Serum concentration before autotransfusion (μg/mL)<0.79<1.1<0.79<2
Serum concentration after autotransfusion (μg/mL)<1.0<1.5
Free ropivacaine concentration after autotransfusion (μg/mL)<0.038
Max. concentration after bolus injection I1.91.5
Max. concentration after bolus injection II2.6

* Peri-articular multimodal analgesia (PMDI).