A method and a device for switching to the inspiration or expiration phase during CPAP therapy are disclosed. By means of a first high threshold value and a second low threshold value non-specific influences on the first derivative of the gas flow curve are suppressed in the corresponding breathing phase and the transition to the corresponding following gas phase is determined with high sensitivity. The invention further relates to methods for recognizing and suppressing the influence of the pulse or for switching to the inspiration phase in case of shallow breathing. The advantages of the invention are greater switching accuracy and improved safety for the patient.

Persons having respiratory diseases often have treatment programs including a pummeling of the thoracic cavity for the purpose of aiding respiration. A vest as a part of an alternating compression machine is used to eliminate the need for trained physical therapists and rather provide for mechanical thumping. A fitting routine for the vest is provided. A routine for identifying optimal operating frequencies for the machine is also provided, along with an algorithm for selecting appropriate frequencies.

Oscillatory chest compression apparatus to aid in loosening and eliminating mucus from the lungs of a cystic fibrosis patient. The apparatus includes a mechanism for applying pressurized air to a bladder covering the chest of a person and a mechanism for venting pressurized air from the bladder. In addition, the apparatus includes a mechanism for supplying the air to the bladder in a regular pattern of pulses. The application of the pressurized pulses and the pulse rate is controllable by the patient.

When treating patients with severely injured or sick lungs, there is often the problem of providing a life sustaining treatment without risking further damage to the lungs as a result of the treatment itself. An apparatus for improving the distribution of gas in the lungs of a patient to alleviate this problem directs a controllable pressure to one or several selected positions on the patient's thorax. In one embodiment of the apparatus, the apparatus includes a vest which includes compartments which can be filled with a fluid under pressure from a pressure source via tubes.

A method and device are disclosed for inflating an inflatable vest to assist the heart in patients suffering from heart failure. The inflation of the vest is synchronized with on-set of the systole phase of the heart, when the left ventricular compresses to force blood out of the heart and through the aorta. The inflated vest compresses the patient's chest and increases the intrathoracic pressure. This increase in pressure assists the heart in moving blood out of the heart and through the aorta. In addition, the vest is arranged to leave the patient's abdomen free of restraint so that the increase in intrathoracic pressure due to the vest moves blood into the abdomen, and to allow the abdomen to dynamically recoil in response to the vest inflation. In addition, ECG signals from electrodes applied to the patient are processed to trigger the vest inflation in real time with the current heartbeat cycle, such that the vest inflation is triggered when the heart begins to contract.