Patients with combat wounds and injuries, presented as extensive infected and purulent defects with antibiotic-resistant microflora, were treated in a surgical inpatient setting. Closure of extensive soft tissue defects of the limbs is possible using methods of plastic and reconstructive surgery and requires preoperative infection control. The lack of effect from preoperative treatment for purulent limb defects with antibiotic-resistant microflora leads to limb amputation. This clinical study proposes a method of treatment by hyperbaric oxygenation with an ozone-containing steam–water mixture as an anti-bacterial agent. Eighteen male patients, aged between 20 and 60 years, were categorised into three groups based on the time elapsed since the injury. All patients were treated using the proposed method. The high effectiveness of the proposed method was demonstrated in all groups and resulted in saving limbs from amputation, establishing suitable conditions for closing the soft tissue defects of the limbs and achieving significant progress in the recovery.