You will be provided with the titles and abstracts of a collection of medical RCT reports studying a clinical question -- for instance, the efficacy of an intervention on some medical outcome. Please write a few sentences synthesizing the findings of these reports, which could serve as a conclusion section for a systematic review article. Your response should not include any other text. The RCT reports are below.



Title 1:
Intermittent pump versus compression bandages in the treatment of venous leg ulcers.
Abstract 1:
The purpose of the present paper was to compare healing rate and leg swelling with an intermittent compression pump versus compression bandages in the treatment of venous leg ulcers, and to also compare patient compliance and satisfaction with the two techniques.
                A randomized cross-over study of patients attending an outpatient wound clinic (n = 16) was undertaken. A regular monthly follow-up with measurement of ulcer size and leg volume was carried out, as well as completion of a questionnaire.
                Assessment was possible in 11 of the 16 patients. There was no significant difference between treatment types with regards to ulcer healing rates or control of leg oedema. The survey revealed that patients found the pump easier and more comfortable to use, with a trend towards increased compliance.
                Although the present study was too small for generalizable conclusions, compression pumps and bandages are comparable in efficacy for the healing of venous leg ulcers. The compression pump is reported as being easier and more comfortable to use than bandages.


Title 2:
Sequential gradient pneumatic compression enhances venous ulcer healing: a randomized trial.
Abstract 2:
The treatment of venous ulcers has remained largely unchanged for centuries. The application of properly applied graduated compression bandages, the use of graduated compression stockings, and surgery have been shown to achieve healing. However, some ulcers persist despite appropriate management. A randomized study was undertaken to compare two regimens of treatment for such patients. Both regimens included ulcer debridement, cleaning, nonadherent dressing, and graduated compression stockings. In one regimen, sequential gradient intermittent pneumatic compression was applied for 4 hours each day. Only one of 24 patients in the control group had complete healing of all ulcers compared with 10 of 21 patients healed in the intermittent pneumatic compression group. The median rate of ulcer healing in the control group was 2.1% area per week compared to 19.8% area per week in the intermittent pneumatic compression group. The results indicate that sequential gradient intermittent pneumatic compression is beneficial in the treatment of venous ulcers.


Title 3:
Intermittent pneumatic compression as an adjuvant therapy in venous ulcer disease.
Abstract 3:
Despite improvements in healing rates venous ulcer disease still carries significant morbidity and cost. Any therapy that further improves healing rates is worthy of consideration. The recognised effects of intermittent pneumatic compression (IPC) on both arterial and venous circulation suggest that its use may confer significant benefits to venous ulcer healing. This study investigates the potential additive effects of adjuvant IPC on the healing and subsequent prevention of venous ulcers. Some improvement in the rate of healing in venous ulcers is noted. These findings are set against a background of very high healing rates in both treatment and control groups. No benefit is seen to accrue if IPC is used as an adjuvant therapy to help prevent recurrence of ulcers although the study period is very short.


Title 4:
Intermittent pneumatic compression improves venous ulcer healing.
Abstract 4:
The effects of intermittent pneumatic compression on the healing rates of ulcers in patients with chronic venous insufficiency were examined in a prospective, controlled study of 22 patients. Patients were randomly assigned to the experimental or the control group. Both groups received local wound care followed by application of an Unna boot. In addition, subjects in the experimental group received intermittent pneumatic compression (IPC) twice weekly for one hour each session. Healing rates were reported in square centimeters per day. Data analysis revealed a mean healing rate of 0.08 cm2 per day for control subjects and 0.15 cm2 per day for experimental subjects. Statistical analysis, demonstrated the healing rates of the two groups to be statistically different. The results appear to indicate that intermittent pneumatic compression is beneficial in the management of venous insufficiency ulcers.
IPC may increase healing compared with no compression, but it is not clear whether it increases healing when added to treatment with bandages, or if it can be used instead of compression bandages. Rapid IPC was better than slow IPC in one trial. Further trials are required to determine whether IPC increases the healing of venous leg ulcers when used in modern practice where compression therapy is widely used.