A 50-year-old woman has been receiving treatment in the hospital for increased edema in the right upper extremity. The PTA has treated the patient for the past 3 weeks with an intermittent compression pump equipped with a multicompartment compression sleeve. The patient’s average blood pressure is 135/80 mmHg. The daily sessions are 3 hours in duration. The pump is set at 50, 40, and 30 mmHg (distal to proximal) for 30 seconds, on and off for 15 seconds. The assistant decides to change the parameters. Of the following changes, which is the most likely to increase the efficiency of treatment?