J Korean Acad Nurs. 2011 Apr;41(2):157-164. Korean.
Published online Apr 30, 2011.
© 2011 Korean Society of Nursing Science
Original Article

Influence of Pre-operative Fasting Time on Blood Glucose in Older Patients

Misuk Hong,1 and Haesang Yoon2
    • 1Nurse Anesthetist, Seoul National University Dental Hospital, Seoul, Korea.
    • 2Professor, Department of Nursing, Gachon University of Medicine & Science, Incheon, Korea.
Received February 04, 2010; Accepted April 15, 2011.

Abstract

Purpose

This study was performed to identify changes in blood glucose at preoperative fasting time in surgical patients over 60 yr.

Methods

Data collection was performed from July, 2008 through July, 2009. Participants consisted of 80 nondiabetic surgical patients. Blood glucose was checked from 3 to 5 times. The 5 times were 2-hr fasting on the pre-operative day (T1, n=80), 8 hr (T2, n=80), 10 hr (T3, n=17), 12 hr (T4, n=34) and 14 hr fasting on the day of the operation (T5, n=29).

Results

Of the patients, 27.5% had a blood glucose level of less than 79 mg/dL at T2; 17.6% at T3; 32.4% at T4; and 17.2% at T5. Mean blood glucose levels were 93.8 mg/dL at T1; 88.4 mg/dL at T2; 91.7 mg/dL at T3; 87.4 mg/dL at T4: and 94.1 mg/dL at T5. Blood glucose was the lowest at T2 (p<.001).

Conclusion

As 17.6-32.4% of the patients showed the blood glucose level of less than 79 mg/dL at 8-14 hr pre-operative fasting, the authors recommend that surgical patients >60 yr-of-age be observed for hypoglycemia during pre-operative fasting of more than 10 hr and that surgical patients >60 yr-of-age with risks for hypoglycemia be scheduled for operation within 10 hr preoperative fasting.

Keywords
Fasting; Blood glucose

Figures

Figure 1
Research design.

OP=operative; X=Blood sampling for blood glucose.

Tables

Table 1
Physiological Characteristics (N=80)

Table 2
Comparison of Blood Glucose by Pre-operative Fasting Time (N=80)

Table 3
Comparison of Blood Glucose by Gender

Table 4
Correlation among Age, BMI, Hemoglobin, Hematocrit, Albumin and Blood Glucose during Pre-operative Fasting (N=80)

Notes

This article is a revision of the first author's master's thesis from Gachon University of Medicine & Science.

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