PERFUSION INDEX DERIVED FROM A PULSE OXIMETER AS A PREDICTOR OF HYPOTENSION FOLLOWING SUB-ARACHNOID BLOCK (SAB) FOR BELOW UMBILICAL SURGERIES

Dr. Ankita Gupta, Dr. Anuj Dubey, Dr. Anupam Pandey, Dr. Mahima Batra, Dr. Sanjay P. Dave

Abstract


Perfusion  Index  (PI)  is  a  relatively  new  parameter  tried  for predicting  hypotension . This  study  aimed  at  investigating  correlation  between  baseline  PI  and  incidence  of  hypotension following  Sub-arachnoid  block (SAB) . In  this  prospective  & observational   study , patients  were  divided  into  2  groups  on  the basis  of  baseline  PI.  Group I  with  PI < 3.5  and  Group II  PI > 3.5. SAB  performed  with  15 mg  of  0.5%  (H)  bupivacaine  at  L3-L4 inter-vertebral  space.  The  incidence  of  hypotension  in  group I   (PI< 3.5)  was  10.71%  compared  to  68.97%  in group II  (PI > 3.5).  There was  significant  correlation  between  baseline  PI  and  number  of episodes  of  hypotension . The  ROC  (Reciever Operating Characteristic)  curve  analysis  revealed  that  baseline  PI  was  suitable for  detecting  patients  at  risk  for  hypotension . For  predicting hypotension , perfusion  index  (PI)  can  be  used  as  a  tool  in  patients undergoing  below  umbilical  surgeries  for  SAB . Patients  with baseline  PI >3.5  have  higher  chances  of   developing  hypotension than  patients  with  PI <3.5.


Keywords


Perfusion index (PI) , Subarachnoid block (SAB) , Hypotension.

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References


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