Clinical Trial: Anesthesia Depth's Influence on Postoperative Delirium

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional

Official Title: The Clinical Investigation of Anesthesia Depth's Influence in Total Intravenous Anesthesia on Postoperative Delirium of Elderly Patients

Brief Summary: The investigators,according to the eligibility criteria,plane to choose 80 elderly anticipates who will undergo selective hip replacement surgery.This participants will be randomly divided into 2 groups:light anesthesia depth group(L Group) and deep anesthesia depth group (D Group).Before anesthesia induction,each participant will be given lumbar plexus and sciatic nerve block in order to control pain of interoperative and postoperative.During operation period,the L Group will be kept in light anesthesia depth(BIS:50-60),while the D group will be kept in deep anesthesia depth(BIS:35-45)--The BIS values in the range of 30-60 have been recommended in general anesthesia.After operation,a PCIA(patient controlled intravenous analgesia) analgesia pump will be given to each participant to control postoperative pain. The investigator will evaluate the mental state of participant with MMSE(mini-mental state examination) before surgery and review each participant with a CAM-CR for 3 days after surgery to assess the situation of postoperation delirium.intraoperative awareness,postoperative pain will also be investigated in postoperative days 1, 2, 3.

Detailed Summary: The investigators,according to the eligibility criteria,plane to choose 80 elderly participants who will undergo selective hip replacement surgery.This participants will be randomly divided into 2 groups:light anesthesia depth group(BIS:50-60) and deep anesthesia depth group (BIS:35-45)--The BIS values in the range of 30-60 have been recommended in general anesthesia.Before anesthesia induction,each participant will be given lumbar plexus and sciatic nerve block in order to control pain of intraoperative and postoperative.The investigator use propofol 4ug\kg、and sufentanil 0.2ug\kg during anesthesia induction period,after that,a Laryngeal mask will be placed into patient's mouth.Anesthesia is maintained with remifentanil TCI(target-controlled infusion) target-controlled infusion(concentration:2ng/ml) and propofol BIS closed-loop target-controlled infusion.During the operation period ,the investigator keep the L Group`s BIS range from 50 to 60.While the D Group`s BIS range from 35 to 45.All participants receive postoperative analgesia.After operation,all participants will be send to PACU(post-anaesthesia care unit ) to wake up and send back to ward,And a PCIA(patient controlled intravenous analgesia) analgesia pump will be given to each participants to control postoperative pain.The investigators will use MMSE(mini-mental state examination) to evaluate the participant's mental state before surgery.For 3 days after operation,The investigator will review each participant with a CAM-CR to assess the situation of postoperation delirium.The investigator will see if there is intraoperative awareness by asking questions.Postoperative pain(with VAS) will also be investigated in postoperative days 1, 2, 3.
Sponsor: Xiangya Hospital of Central South University

Current Primary Outcome:

  • postoperative delirium score(with The Confusion Assessment Method) [ Time Frame: 3 days ]
    the The Confusion Assessment Method is widely used to access the postoperative delirium all around the world.the total score more than 22 means that the The participant has got delirium.
  • final data analysis [ Time Frame: 10 days ]
    the investigators use SPSS software to analysis data.


Original Primary Outcome:

  • postoperative delirium score(with The Confusion Accessment Methold) [ Time Frame: 3 days ]
    the The Confusion Accessment Methold is widely used to access the postoperative delirium all around the world.the total score more than 22 means that the The participant has got delirium.
  • final data analysis [ Time Frame: 10 days ]
    the investigators use SPSS software to analysis data.


Current Secondary Outcome:

  • postoperative pain score(with visual analogue scale) [ Time Frame: 3 days ]
  • intraoperative awareness [ Time Frame: 1 day ]


Original Secondary Outcome: Same as current

Information By: Xiangya Hospital of Central South University

Dates:
Date Received: November 16, 2016
Date Started: November 2016
Date Completion: November 2017
Last Updated: December 13, 2016
Last Verified: November 2016