Objective To explore the effect of mechanical principle-based pressure injury prevention and care in postoperative care of elderly patients with benign prostatic hyperplasia（BPH）

so as to provide a reference for clinical treatment. Methods Ninety-two elderly patients who underwent BPH surgery in the Zhumadian Central Hospital from January 2016 to December 2021 were selected as the study subjects. The patients were assigned to the control group（n=46） and experimental group（n=46） by a random number table. Patients in the control group received routine care and patients in the experimental group mechanical principle-based stress injury prevention and care program on the basis of the care in the control group. The incidence of bladder spasms and complications were compared between the two groups. The exhaust time

first ambulation time

and length of hospital stay were compared between the 2 groups. Visual analogue scale（VAS） scores were compared between the 2 groups at 1

3

and 7 days after surgery. Results The total incidence of bladder spasms and complications in the experimental group were 17.39% and 13.05%

which were significantly lower than those in the control group（45.65%and 39.13%

P<0.05）. The length of hospital stay

exhaust time

and first ambulation time of patients in the experimental group were significantly shorter than those in the control group（P<0.05）. The VAS scores at 3 and 7 days after operation in the experimental group were significantly lower than that in the control group（P<0.05）. Conclusion The application of the mechanical principle-based pressure injury prevention and care shows marked effects in postoperative care of elderly patients with benign prostatic hyperplasia

which can reduce the incidence of bladder spasms

relieve pain

reduce the incidence of complications and promote the recovery of patients. These benefits justify a wider application of this technique in clinical practice.