Glycemic Control to Prevent Cardiac Morbidity in Vascular Surgery

Abdominal Aortic Aneurysm Clinical Trial

Official title:

Impact of Tight Control of Perioperative Blood Glucose in Patients Undergoing Vascular Surgery on Their Perioperative Cardiovascular and Overall Morbidity and Mortality

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT00328094
• Other study ID #: 2005P-000299
• Status: Terminated
• Phase: N/A
• First received: May 18, 2006
• Last updated: April 10, 2013
• Start date: March 2006
• Est. completion date: May 2009

Study information

• Verified date: April 2013
• Source: Beth Israel Deaconess Medical Center
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Interventional

Clinical Trial Summary

Aggressive intraoperative and postoperative management of blood glucose may substantially decrease perioperative cardiovascular and infectious complications in diabetic and non-diabetic patients undergoing vascular surgery.

The purpose of this study is to compare the tight versus traditional blood glucose control in diabetics and non-diabetics undergoing vascular surgery in regard to their postoperative fatal and nonfatal cardiac outcomes, and the secondary effects such as rate of infections, overall morbidity and 30-day mortality.

Description:

This is a randomized, prospective controlled trial in both diabetic and non diabetic patients undergoing vascular surgery such as abdominal aortic, infra inguinal vascular bypass procedures and amputations, comparing tight versus standard blood glucose control regimens in the operating room, post anesthesia care unit and in the postoperative vascular intensive care unit up to 48 hours and its impact on the cardiovascular, infectious and other morbidity and mortality during the hospital admission and up to 30 days from surgery.

After obtaining informed consent, the study subjects will be randomized to tight versus standard blood glucose control regimens. These regimens will be started in the operating room and continued for the first 48 hours or until their discharge, whichever is earlier. All the patients will be inpatients. Day surgery patients will be excluded.

The anesthesiologist providing patient care will be given either the tight glucose control protocol or the standard sliding scale insulin protocol. In the tight control regimen, target blood glucose is 100-150 mg/dl. If 3 consecutive blood glucose (BG) level >150 mg/dL or 1 BG level >200 mg/dL, then the insulin infusion will be initiated in the tight control group. The insulin infusion rate adjustments will be made based on the blood sugar results. In post anesthetic care unit (PACU) and vascular intensive care unit (VICU), these protocols will be nurse driven. The adjustments will be made based on the current blood sugar levels as well as the insulin infusion rates. They are adjusted in such a way to account for the rate of change of blood sugars and the presence of steroid therapy in the patients. The frequency of blood glucose testing in this group will be every 1-hour until stable (when frequent changes in insulin dosage are no longer necessary, and glucose is in the range of 100 to 150 for 3 consecutive blood sugar checks); then test every 2 hours for 3 consecutive target values and then every 4 hours thereafter. If there is a change in the infusion rates, then blood sugar checks will be done every hour and the cycle followed thereafter.

In the standard sliding scale insulin group, blood sugars will be treated with insulin boluses if the blood sugars go more than 150 mg/dL and blood glucose will be monitored every 4 hours.

These regimens will be initiated after 2 weeks of in-service training for anesthesiologists, post anesthetic care unit (PACU) and vascular intensive care unit (VICU) nurses. The study investigators will provide this training. Insulin infusion in the tight control regimen will be started through pump piggyback to maintenance intravenous infusion as follows. Insulin infusion bags will be made by the pharmacy (100 units in a 100 ml bag). The anesthesiologists in the operating room and PACU, and VICU nurses will perform blood glucose monitoring, bolus insulin administration, and infusion initiation and rate adjustments as specified by the protocol. Blood glucose levels will be tested by finger stick method or arterial line drop sample.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 242
• Est. completion date: May 2009
• Est. primary completion date: April 2008
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Abdominal aortic surgery

• Supra and infrainguinal peripheral vascular bypass surgery

• Below knee amputations

• Above knee amputations

• Diabetics and nondiabetics

• American Society of Anesthesiologists (ASA) I-III

Exclusion Criteria:

• Brittle diabetics

• ASA 1V,V

• Second surgery in same admission

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Abdominal Aortic Aneurysm
• Aortic Aneurysm
• Aortic Aneurysm, Abdominal
• Peripheral Arterial Disease
• Peripheral Vascular Disease
• Peripheral Vascular Diseases
• Vascular Diseases

Intervention

Drug:
• continuous intravenous insulin infusion
Tight glucose control versus standard of care

Locations

Country	Name	City	State
United States	Beth Israel Deaconess Medical Center	Boston	Massachusetts

Sponsors (1)

Lead Sponsor	Collaborator
Beth Israel Deaconess Medical Center

Country where clinical trial is conducted

United States, 

References & Publications (4)

Furnary AP, Zerr KJ, Grunkemeier GL, Starr A. Continuous intravenous insulin infusion reduces the incidence of deep sternal wound infection in diabetic patients after cardiac surgical procedures. Ann Thorac Surg. 1999 Feb;67(2):352-60; discussion 360-2. — View Citation

Kersten JR, Warltier DC, Pagel PS. Aggressive control of intraoperative blood glucose concentration: a shifting paradigm? Anesthesiology. 2005 Oct;103(4):677-8. — View Citation

van den Berghe G, Wouters P, Weekers F, Verwaest C, Bruyninckx F, Schetz M, Vlasselaers D, Ferdinande P, Lauwers P, Bouillon R. Intensive insulin therapy in critically ill patients. N Engl J Med. 2001 Nov 8;345(19):1359-67. — View Citation

Zimmerman CR, Mlynarek ME, Jordan JA, Rajda CA, Horst HM. An insulin infusion protocol in critically ill cardiothoracic surgery patients. Ann Pharmacother. 2004 Jul-Aug;38(7-8):1123-9. Epub 2004 May 18. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Composite (Myocardial Infarction and CHF)		hospital length of stay	No
Secondary	Incidence of Wound Infections		postoperative	No