The goal of this clinical trial is to determine whether buffering, warming, or addition of hyaluronidase or tranexamic acid to lignocaine during eyelid injection of local anaesthesia reduce injection pain and procedure-related pain and improve perioperative haemostasis.
Inclusion Criteria:
Exclusion Criteria:
wcl589@ha.org.hk+852 35052878
One eyelid: lignocaine buffered with sodium bicarbonate; the other eyelid: unmodified solution of lignocaine
One eyelid: lignocaine warmed to body temperature; the other eyelid: unmodified solution of lignocaine at room temperature
One eyelid: lignocaine with hyaluronidase added; the other eyelid: unmodified solution of lignocaine
One eyelid: lignocaine with tranexamic acid added; the other eyelid: unmodified solution of lignocaine
One eyelid: modification A; the other eyelid: modification B
One eyelid: modification A+B; the other eyelid: modification A
One eyelid: modification A+B; the other eyelid: modification B
chongkamlung@cuhk.edu.hk+852 39435824
wcl589@ha.org.hk+852 35052878
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