The ideal drainage system would decrease hematoma formation and not cause excess
blood loss. Some blood-saving strategies such as the autologous blood reinfusion, fibrin
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sealant, pharmacological intervention, or other additional management have been
reported to achieve this goal. The drain clamping method, if it is effective, is a much
easier way to reduce blood loss compared to these interventions. The initial clamping
provides a temporary tamponade effect, as well as the delayed release prevents
hematoma formation.