VAC Dressing (Negative Pressure Wound Therapy NPWT) An advanced wound care technique that uses controlled negative pressure (50 to 125 mmHg) to remove exudate, reduce infection, and promote healthy granulation tissue. WoundPro Dressing Kit Features & Benefits The Wound Vac Company VAC Therapy Machine HealthCare Needs INPWT S1 Negative Pressure Wound Therapy System Devices Wound Vac Machine And Npwt Dressing Kits Alisa The Essentials of Negative Pressure Wound Therapy.aspx