FIELD: medicine.SUBSTANCE: group of inventions relates to medicine. Apparatus for providing a negative pressure at a wound site comprises a suction pump to generate negative pressure, a negative pressure reservoir, a valve element and an additional valve element connected between the reservoir of negative pressure and the suction pump and made with possibility of connecting the suction pump to the negative pressure reservoir at pressure drop in the said reservoir to the threshold value of negative pressure. Valve element is intended for selective provision of fluid communication between the above reservoir and a wound site when negative pressure in the said reservoir exceeds the threshold value of negative pressure, thereby ensuring the preset negative pressure at the wound site. Valve element comprises a permeable element with opposing side walls. In response to pressure reduction in the said reservoir to the threshold value of negative pressure the suction pump is actuated to recover the initial negative pressure in the said reservoir. Method of providing negative pressure at a wound site, in which at negative pressure in the negative pressure reservoir exceeding the threshold value of negative pressure, by means of the valve element, fluid communication between the negative pressure reservoir and the wound site is selectively provided in order to provide the specified negative pressure at the wound site in response to the reduction of negative pressure in the said reservoir to the threshold value of negative pressure the initial negative pressure is restored in the said reservoir by means of the suction pump through an additional valve element connected between the negative pressure reservoir and the suction pump and configured to connect the suction pump with the negative pressure reservoir at the pressure drop in the said reservoir to the threshold value of negative pressure. Valve element comprises a permeable element with opposing side walls. Method for limit
