Journal List > Korean J Women Health Nurs > v.21(1) > 1089511

Hwang and Park: Effects of Preoperative Dehydration on Postoperative Nausea and Vomiting in Gynecological Surgery Patients

Abstract

Purpose

The purpose of this study was to investigate the effect of dehydration from preoperative fasting on postoperative nausea and vomiting in patients who underwent gynecologic surgeries.

Methods

Study design was a prospective descriptive study. A total of 75 patients in a university hospital were selected. Data were collected from March 17 to May 16, 2014 using self-report questionnaires and clinical electronic chart.

Results

Factors influencing the development of postoperative nausea and vomiting were type of surgery (t=3.44, p=.001), use of PCA (t=-2.16, p=.034), and preoperative dehydration level (t=5.93, p<.001), and these variables accounted for 51.7% of postoperative nausea and vomiting. Among these variables, preoperative dehydration amount (β=.56) showed the largest influence in the difference in postoperative nausea and vomiting.

Conclusion

Reducing dehydration during preoperative fasting can prevent occurrence of postoperative nausea and vomiting. Development of a clinical guideline is necessary to give directions for the prevention of dehydration during preoperative fasting and to ensure the proper duration of fasting according to patient characteristics, type of surgery and time of surgery.

Figures and Tables

Table 1

Level of Dehydration during Preoperative Fasting and INVR score during Postoperative 24 hour Period (N=75)

kjwhn-21-23-i001
Characteristics M±SD Measuring range Tool range
Amount of preoperative dehydration (mL) 610.58±217.97 97.00~1,118.00 -
INVR score 7.35±5.65 0~25 0~32

INVR=rhodes index of nausea, vomiting and retching.

Table 2

Difference in Postoperative Nausea and Vomiting according to General Characteristics (N=75)

kjwhn-21-23-i002
Characteristics Categories PONV
n (%) M±SD t or F p
Age (year) (M±SD: 48.04±7.51) (Range: 35~68) <40 8 (10.7) 10.50±6.17 0.56 .649
40~49 42 (56.0) 8.95±5.83
50~59 18 (24.0) 7.71±6.51
≥60 7 (9.3) 7.17±5.46
Weight (kg) (M±SD: 63.04±11.54) (Range: 43.00~110.00) <50 7 (9.3) 4.93±4.51a 5.43 .002 (a<d)
50~<60 27 (36.0) 5.14±5.21b
60~<70 20 (26.7) 7.80±4.95c
≥70 21 (28.0) 10.76±6.19d
BMI (kg/m2) 18.5~<23.0 23 (30.7) 5.48±5.03 -1.94 .056
≥23.0 52 (69.3) 8.17±5.76
Smoking history Yes 0 (0.0) 0.00 N/A N/A
No 75 (100.0) 7.35±5.65
History of surgery Yes 28 (37.3) 7.54±4.87 0.22 .825
No 47 (62.7) 7.23±6.12
History of PONV Yes 8 (28.6) 8.25±5.34 0.48 .633
No 20 (71.4) 7.25±4.79
History of motion sickness Yes 31 (41.3) 9.48±6.24 2.88 .005
No 44 (58.7) 5.84±4.71

BMI=body mass index, N/A=Not available, PONV=postoperative nausea and vomiting; Scheff'e test, Exclusion of non-relevant data.

Table 3

Difference in Postoperative Nausea and Vomiting according to Anesthetic and Surgical related Characteristics (N=75)

kjwhn-21-23-i003
Characteristics Categories PONV
n (%) M±SD t p
Type of operation Hysterectomy and oophorosalpingectomy 53 (70.7) 6.94±5.38 -0.96 .341
Oophorosalpingectomy 22 (29.3) 8.32±6.28
Type of surgery Abdominal incision 45 (60.0) 5.36±5.27 -2.15 .040
Laparoscopic 30 (40.0) 9.83±6.67
Fasting time (minutes) <617 42 (56.0) 7.19±5.71 -0.27 .789
≥617 33 (44.0) 7.55±5.66
Administrated fluid amount during preoperative fasting (mL) <360 45 (60.0) 6.73±4.88 -1.09 .283
≥360 30 (40.0) 8.27±6.62
Inhalation agent Desflurane 45 (60.0) 7.16±5.90 -0.36 .722
Sevoflurane 30 (40.0) 7.63±5.33
Duration of surgery (minutes) <144 43 (57.3) 8.21±5.99 1.55 .126
≥144 32 (42.7) 6.19±5.01
Administrated fluid amount during surgery (mL) <1100 44 (58.7) 7.61±5.77 0.49 .629
≥1100 31 (41.3) 6.97±5.55
Use of PCA Yes 63 (84.0) 7.54±5.88 0.68 .502
No 12 (16.0) 6.33±4.31
Use of additive anti-emetic Yes 36 (48.0) 7.94±6.24 0.87 .382
No 39 (52.0) 6.79±5.07

PCA=patient controlled analgesia.

Table 4

Factors associated Postoperative Nausea and Vomiting in Gynecologic Surgery (N=75)

kjwhn-21-23-i004
Variables Model 1 Model 2 Model 3
B β t B β t B β t
History of PONV -1.36 -.09 -0.80 -2.19 -.14 -1.35 -2.47 -.16 -1.87
History of motion sickness -3.64 -.32 -2.87** -3.86 -.34 -3.20** -1.15 -.10 -1.05
Type of surgery§ 4.93 .43 3.32** 4.18 .37 3.44**
Duration of surgery -0.02 -.22 -1.34 -0.02 -.22 -1.64
Administrated fluid amount during surgery 0.00 .17 1.06 0.00 .13 0.96
Use of PCA -5.25 -.34 -2.66* -3.54 -.23 -2.16*
Amount of preoperative dehydration 0.02 .56 5.93***
F (p) 4.45(.015) 4.05(.002) 10.23(<.001)
R2 .11 .26 .52
R2 change .15 .25

*p<.05, **p<.01, ***p<.001; Dummy variables: History of PONV (0: Yes, 1: No); History of motion sickness (0: Yes, 1: No); §Type of surgery (0: Abdominal incision, 1: Laparoscopic), Use of PCA (0: Yes, 1: No).

Notes

This manuscript is a condensed from of the first author's master's thesis from Yonsei University.

Summary Statement

▪ What is already known about this topic?
Preoperative fasting is prerequisite for all patients who are undergoing surgeries, but it is related to postoperative nausea and vomiting. Dehydration may affect postoperative nausea and vomiting.
▪ What this paper adds?
Our research identified that the amountof dehydration from preoperative fasting is the most significant factor that affects the extent of postoperative nausea and vomiting.
▪ Implications for practice, education and/or policy
This study shows preoperative fasting causes postoperative nausea and vomiting. Time of midnight should be reorganized into new timing system for patients who undergo a surgery in different time period.

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