Total Hip Arthroplasty in Patients with Idiopathic Thrombocytopenic Purpura

Background. There are no national clinical guidelines for the perioperative management of patients with idiopathic thrombocytopenia in hip arthroplasty. Most of the publications are presented in the context of general surgery, the distinguishing feature of which is the good achievement of hemostasis. However, it is impossible to achieve such a level of hemostasis with hip arthroplasty.

The aim of the study was to evaluate the mid-term results of total hip arthroplasty in patients with primary idiopathic thrombocytopenia.

Methods. Randomized monocenter clinical trial of 38 patients with idiopathic thrombocytopenia hip arthroplasty was performed. These patients was include in group I. As a control group, the outcomes of surgical treatment of 40 patients without thrombocytopenia over the same observation period were analyzed (group II). The mean follow-up period was 4.3 years. Exclusion criteria for the study were heparin-induced thrombocytopenia, a severe form of idiopathic thrombocytopenia in the acute stage with platelet counts less than 25×10⁹/L.

Results. The average length of hospitalization was longer in patients with idiopathic thrombocytopenia (11.1 days). The results indicate a longer preoperative preparation, including the transfusion of hemocomponents with repeated monitoring of the parameters of the clinical blood test and coagulogram. There was no significant difference in the duration of the surgical intervention, but there were differences in the amount of intraoperative blood loss and the volume of blood transfusion. Among the patients of the group II, only 3 patients required intraoperative transfusion of one dose of erythrocyte suspension, patients of the group I more often underwent blood transfusion. In the group I, complications were noted in 5 patients, in the group II — in one patient (p = 0.067), but the relative risk of complications was 5.2. Functional results 12 months after surgery didn’t differ.

Conclusions. The mid-term results of hip arthroplasty in patients with idiopathic thrombocytopenia are comparable to the results in patients of the general population. A distinctive feature of surgical intervention is an increase in the average volume of intraoperative blood loss and the need for a significantly larger transfusion of hemocomponents not only during the operation, but also in the preoperative period, which increases the duration of hospitalization.