OBJECTIVE: To examine the effect of incentive spirometry (IS) on respiratory function after laparotomy.
DESIGN and PARTICIPANTS: This was a randomized controlled trial. Study participants were patients who underwent elective laparotomy with general anesthesia from September 20, 2015 to May 28, 2016.
INTERVENTION: All patients received a routine program to prevent pulmonary complication, including instructions for deep breathing and early ambulation. The intervention group was requested to use incentive spirometry for 10 breaths, 4 times per day from the first postoperative day to the seventh. We used Coach2(R) (PORTEX).
PRIMARY ENDPOINT: We assessed the recovery rate of the inspiratory capacity (IC) on the 3rd postoperative day (POD) relative to the preoperative IC. We further conducted exploratory analysis regarding the factors related to the recovery rate of the IC.
RESULTS: Each group consisted of 36 participants. The mean IC recovery rate on the 3rd POD was 54.1 ± 23.7% in the control group and 55.0 ± 22.5% in the intervention group (p = 0.86) without statistically significant difference. In the control group, the IC recovery rate on the 3rd POD was statistically significantly lower in the group with the initial walking day equal to or later than the 2nd POD than the group with the initial walking day equal to the 1st POD [40.9 ± 22.5%, 60.8 ± 21.7% (p = 0.015)], whereas there was no statistically significant difference in the intervention group [51.9 ± 27.3%, 55.9 ± 21.4% (p = 0.662)].
CONCLUSION: Postoperative treatment with IS of 10 breaths, 4 times per day did not improve the inspiratory capacity from the routine program group after laparotomy. IS training may potentially be preventing the effect from delay in ambulation. Further study specifically targeting patients who cannot ambulate early after operations is warranted.
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