To evaluate the influence of bedside ultrasound on indwelling catheter removal and bladder function recovery for critically ill patients with long-term indwelling catheter.

Use random sampling to choose 92 patients during October 2018 to December 2018 as research objects, objects were allocated into observation group and control group by random digits table method with 46 cases each. All patients had their indwelling catheter clamped 72 hours after insertion as per routine practice, control group had clamp opened and indwelling catheter drained third hourly during the day and fourth hourly through the night; for patients in observation group, bladder volume were evaluated with USS scanner hourly, indwelling catheter was opened and drained when bladder urine volume was about 300 ml, use the shortest bladder-filling time as the interval for indwelling catheter opening time, increasing the interval by one hour through the night. the leakage rate, first urination time, first urination volume, bladder residual volume, indwelling catheter reinsertion rate, voluntary urination rate for patients from two groups were compared.

The incidence of urinary leakage in the observation group was 7.14%(3/42),which lower than that in the control group (25.58%, 11/43), the difference was statistically significant (χ²=5.251, P<0.05). The residual urine volume in the bladder was 16 (8.50, 37.00) ml in the observation group, which lower than that in the control group 41 (13.75, 130.25) ml, the difference was statistically significant (t=2.103, P<0.05). The rate of self-urination was 57.15%(24/42) in the observation group, which higher than that in the control group (34.88%,15/43), the difference was statistically significant (χ²=4.24, P<0.05). Induced urination rate and urethral replacement rate were 7.14%(3/42), 11.9%(5/42), 30.95%(13/42) in the observation group and 9.3%(4/43), 16.28%(7/43), 48.84%(21/43) in the control group respectively. There was no significant difference between the two groups (χ²= 0.131, 0.335, 2.832, P > 0.05). The first urination time was (144.66± 66.13) in the observation group and (179.55± 87.50) in the control group, respectively. There was no significant difference between the two groups(t= 1.623, P > 0.05).

The use of bedside USS scan to evaluate the bladder volume of critical patients with indwelling catheter can help facilitate early indwelling catheter removal and encourage patients to regain bladder function.

Urinary catheterization; Bladder function training; Urinary retention; Clamping of catheters