Abstract: An apparatus (1) to assist a patient's respiration by delivering air to a patient through a mask (20), including a ramp module (10) connected to a control unit (2) to provide the control unit with a pressure value PM at mask (20), so that when apparatus (1) starts functioning, the pressure progressively rises until it reaches a treatment pressure PTi, the apparatus further including a comparator connected to ramp module (10), at least one device for detecting the patient's breathing parameters and sending them to the comparator, so that the comparator can determine whether an event (E1, E2 or E3) occurs in patient's breathing and to send the corresponding data to ramp module (10) which provides control unit (2) with a pressure value PM that will speed up with respect of time, so that the pressure rise at patient's mask (20) is accelerated.

Abstract: An apparatus (1) to assist a patient's respiration by delivering air to a patient through a mask, the mask designed to be connected to a first extremity of a tube, the apparatus including: a control unit (2) to adjust the pressure delivered by a blower (4), a first pressure sensor (6) for sensing pressure PM at the first tube extremity and being connected to the control unit, and a second pressure sensor(8) for sensing pressure PB at the air output of the blower and being connected to the control unit; so that, when a tube is connected to the mask and connected to the apparatus at its second extremity, the air flowing from the apparatus to the mask, the control unit is able to calculate the airflow at the tube's second extremity from the pressures PM and PB and from the tube's airflow resistance coefficient Kt.

Abstract: An apparatus (1) to assist a patient's respiration by delivering air to a patient through a mask, the mask designed to be connected to a first extremity of a tube, the apparatus including: a control unit (2) to adjust the pressure delivered by a blower (4), a first pressure sensor (6) for sensing pressure PM at the first tube extremity and being connected to the control unit, and a second pressure sensor (8) for sensing pressure PB at the air output of the blower and being connected to the control unit; so that, when a tube is connected to the mask and connected to the apparatus at its second extremity, the air flowing from the apparatus to the mask, the control unit is able to calculate the airflow at the tube's second extremity from the pressures PM and PB and from the tube's airflow resistance coefficient Kt.

Abstract: A process for the preparation of tripeptides of the general formula IU-A-B-C-OH Iin which U denotes hydrogen or a urethane protective group and A, B and C denote amino acids, by reaction of a compound of the general formula IIU'-B-OH IIin which U' is a urethane protective group which can be eliminated by hydrogenolysis, with a compound of the general formula IIIH-C-OR IIIin which R denotes alkyl, by the PPA method, elimination of U', and reacting the resulting compound of the formula IVH-B-C-OR IVwith a compound of the formula VU-A-OH Vin the presence of propylphosphonic anhydride, and finally eliminating R enzymatically.