Anesthesia and analgesia
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Anesthesia and analgesia · Oct 2017
Observational StudyPupillary Reflex for Evaluation of Thoracic Paravertebral Block: A Prospective Observational Feasibility Study.
Although thoracic paravertebral block (TPVB) is recommended in major breast surgery, there is no gold standard to assess the success of TPVB. Pupillary dilation reflex (PDR) is the variation of the pupillary diameter after a noxious stimulus. The objective was to evaluate the feasibility of recording the PDR to assess analgesia in an anesthetized thoracic dermatome after TPVB. ⋯ This proof-of-concept trial suggests that the effect of TPVB could be monitored by measuring the PDR after anterior chest wall stimulation in the dermatome of interest.