Deep venous thrombosis and postsplenectomy thrombocytosis

Area of Science:

• Hematology
• Vascular Surgery
• Thrombosis Research

Background:

• Splenectomy can lead to thrombocytosis, a condition of elevated platelet counts.
• The risk of deep vein thrombosis (DVT) in patients with postsplenectomy thrombocytosis is a clinical concern.
• Existing guidelines on prophylactic antithrombotic therapy for these patients are debated.

Purpose of the Study:

• To investigate the relationship between postsplenectomy thrombocytosis and the incidence of deep vein thrombosis.
• To determine if elevated platelet counts necessitate routine prophylactic antithrombotic treatment after splenectomy.

Main Methods:

• Serial platelet counts were performed preoperatively and postoperatively in 86 patients undergoing elective splenectomy.
• Leg scanning using iodine 125-labeled fibrinogen was employed to detect deep leg vein thromboses.
• Dye phlebography was used to confirm positive findings from labeled fibrinogen scans.

Main Results:

• Deep venous thrombosis (DVT) developed in only 5 patients (6%) out of 86 studied.
• None of the 5 patients who developed DVT had platelet counts reaching 600,000/cu mm before or at the time of thrombosis.
• 21 other patients with platelet counts exceeding 1,000,000/cu mm showed no evidence of venous thrombosis.

Conclusions:

• The study's findings do not support the routine use of prophylactic antithrombotic therapy for patients with postsplenectomy thrombocytosis.
• Elevated platelet counts alone, even significantly high ones, did not correlate with an increased risk of DVT in this cohort.
• Further research may be needed to identify specific risk factors for DVT in the postsplenectomy population.