1. A portable manual pressure support system (10) configured to supply a flow of respiratory gas under pressure to the respiratory tract of a subject (12), said pressure support system comprising: a pressure generator (14) configured to generate a flow of respiratory gas under pressure ; the interface (16) of the subject, configured to transmit a stream of respiratory gas under pressure to the respiratory tract of the subject; one or more sensors (18), configured to generate output signals, carrying x information related to one or more parameters of the gas flow of the respiratory gas under pressure; one or more processors (20) configured to control the operation of the pressure generator to generate a flow of respiratory gas under pressure, based on the output signals of one or more sensors, in accordance with a positive pressure support therapy regimen; a portable power supply (26) configured to power a pressure generator, one or more sensors and one or more processors s; a housing (28) adapted to receive a pressure generator, an interface entity, one or more sensors, one or more processors and a power supply; a pen (30) attached to the body and / or formed by the body, adapted to be gripped by the patient to hold the body in position relative to the airways of the subject as the flow of respiratory gas under pressure is supplied to the airways of the subject. 2. The system of claim 1, wherein the maximum enclosure volume is 135 cubic inches1. Портативная ручная система (10) поддержки давления, выполненная с возможностью подачи потока дыхательного газа под давлением к дыхательным путям субъекта (12), причем упомянутая система поддержки давления содержит:генератор (14) давления, выполненный с возможностью генерирования потока дыхательного газа под давлением;интерфейс (16) субъекта, выполненный с возможностью передачи потока дыхательного газа под давлением к дыхательным путям субъекта;один или более датчиков (18), выполненных с возможностью генерирования выходных си