Surgery: kinesitherapy – Kinesitherapy – Exercising appliance
Patent
1996-03-12
1997-12-02
Clark, Jeanne M.
Surgery: kinesitherapy
Kinesitherapy
Exercising appliance
601106, 12820426, A61H 3100
Patent
active
056930054
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a mobile apparatus for cardiac massage. More specifically, the present invention provides an apparatus for resuscitation of patients with cardiac arrest by means of cardiac compression combined with artificial ventilation.
Resuscitation as mentioned above is difficult to carry out correctly, partly because cardiac compression is physically very strenuous, and a person must be well practiced and experienced in order to execute it correctly. Further, it is difficult to coordinate the cardiac compressions with ventilation into the lungs at the correct tempo and with the necessary pause in the compressions. This type of resuscitation is difficult to carry out at a hospital under optimal conditions, very difficult outside a hospital and almost impossible in a moving ambulance and in rescue helicopters.
There has recently been developed an apparatus for automatic cardiac compression. In the event of a cardiac arrest, the patient is fastened securely to an equipment case by means of two shoulder straps and a plastic bar across the chest. On this bar is positioned a piston that receives energy pulses through a tube from a hydraulic unit inside the case. The hydraulic pump is driven by a battery.
Although this apparatus improves the potential for saving lives, it is nevertheless burdened with some critical disadvantages. First, the apparatus is dependent on electricity or battery power. Also, this solution provides for cardiac compression only.
In EP 0010908-A1 an apparatus for cardiac treatment is described. The apparatus discussed in this publication is far more complicated than the device according to the present invention and includes electrodes for electrical cardiac stimulation. One of these electrodes is guided into the patient's oesophagus to the area under the heart, the other is placed on the surface of the compression device, which is pressed against the patient's chest. This is an apparatus which must be operated by trained personnel.
SE 7505469-2 relates to a device for ventilating a person, where the major emphasis is placed on the regulation of the piston stroke length and the oxygen volume that is introduced in accordance with the size of the patient.
U.S. Pat. No. 1,140,581 describes a heart-lung resuscitation device that is pneumatically driven. It is apparent, however, that the control system used here is far more complicated, and thus more sensitive, than the control system of the present invention.
U.S. Pat. No. 3307541 similarly describes an apparatus for cardiac treatment. This is also much more complicated than the device in accordance with the present invention. It includes, among other features, an air motor which drives some of the valves. The air motor is, in turn, driven by means of oxygen that is transferred from the oxygen container over into a smaller tank.
With the present invention there is provided an apparatus for a mobile heart massage unit comprising a pressure cylinder, containing a medium suitable for supplying to a person with reduced or interrupted lung function, connected with a thrust device for provision of cardiac compression, characterized in that it comprises an automatic control device which actuates the cardiac compression, consisting of a pressure regulated 3/2 valve that is open in the start phase, a time regulated valve that is closed in the start phase, a control link for determining the duration of the cardiac compression and a unistable 5/2 valve, and having a breathing mask, there being a control means (also herein referred to as a control bypass valve in operative
the automatic control device and the breathing mask.
The apparatus according to the invention may also be employed without the compression function, i.e., with supplying of oxygen only.
A preferred embodiment of the invention is characterized in that the control device is manual and consists of a switch 76 which halts the cardiac compression simultaneously with the supplying of a respiratory medium to the injured person's lungs, and vice versa.
With the apparatus ac
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patent: 4721133 (1988-01-01), Sundblom
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