PMC8240244_01
(A) Multiple prominent ecchymotic patches on legs. (B) C (check): Check, only injector, P (patient): 0.1 ml venous blood injected area with plasma separated, S (serum): Serum physiological. (C) P (patient): 2x2 cm painful ecchymotic patch in the part where 0.1 ml of venous blood is injected with plasma separated 30 min after injection.
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F1
At the same time, control physiological saline solution 0.1 ml and empty syringe were administered intradermally to the left arm (Fig. 1B). Thirty minutes after the injection, 2x4 cm painful ecchymotic area developed in the patient plasma injected part (Fig. 1C).