Blood flow in the arm under brachial plexus anaesthesia

Area of Science:

• Anesthesiology
• Vascular Physiology
• Thermoregulation

Background:

• Brachial plexus anesthesia is commonly used for upper limb procedures.
• Understanding its effects on local circulation and temperature is crucial for patient safety.
• The role of adrenaline in modulating these effects requires further investigation.

Purpose of the Study:

• To investigate the impact of adrenaline in brachial plexus anesthesia on blood flow and skin temperature in the arm.
• To compare the physiological responses between anesthesia with and without adrenaline.

Main Methods:

• Twenty patients undergoing brachial plexus anesthesia were studied.
• Blood flow and skin temperature in the arms were measured.
• Patients were divided into two groups: one receiving anesthesia with adrenaline (1:100,000), the other without.

Main Results:

• All patients showed an increase in blood flow and skin temperature.
• The group receiving adrenaline exhibited a significantly greater rise in flow volume (P < 0.05) and skin temperature (P < 0.01).
• Changes in flow velocity were not significantly different between groups.

Conclusions:

• Adrenaline enhances the increase in arm blood flow and skin temperature during brachial plexus anesthesia.
• These findings suggest a potential benefit of adrenaline in improving local perfusion and warmth.
• Further research may explore optimal adrenaline concentrations for clinical application.