Surgery: kinesitherapy – Kinesitherapy – Exercising appliance
Reexamination Certificate
2000-06-26
2001-12-25
Yu, Justine R. (Department: 3764)
Surgery: kinesitherapy
Kinesitherapy
Exercising appliance
C601S107000
Reexamination Certificate
active
06332872
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a portable cardiopulmonary resuscitation device with precise compression depth and uniformity, and more particularly to a cardiopulmonary resuscitation device by which the compression depth is settable. With the cardiopulmonary resuscitation device, the chest compression can be precisely performed at the preset compression depth by a less experienced or non-expert person. Also, the chest compression can be performed in a running ambulance when transferring a victim. The cardiopulmonary resuscitation device is composed of few components and has a light weight structure so that it can be easily carried and the manufacturing cost of the cardiopulmonary resuscitation device is relatively low.
The compression stroke depth is critical in cardiopulmonary resuscitation chest compression. For example, the stoke depth is generally 2 inches for an adult and 1.5 inches for a child. Numerous cardiopulmonary resuscitation (CPR) devices have heretofore been proposed. A major disadvantage of many of these is that no provision is made for applying the exact and repeatable compression stroke depth which are recommended by the American Heart Association.
This problem has heretofore been recognized and several attempts have been made to solve it. For example, U.S. patent Ser. No. 05/589,639 discloses the use of electrical sensor to determine the force applied when victim's chest is being compressed. The amount of force exerted onto victim did not correspond exactly to the stroke depth acquired. The deciding factor is the stroke depth, not the force applied.
U.S. Pat. No. 4,019,501 discloses the use of fluid pressure gauge to determine the force applied but not the compression stoke depth acquired.
U.S. patent Ser. No. 05/645,522 also discloses the use of pressure sensing instrument to determine the force applied.
Other patents resulted from a patent search include:
U.S. Pat. Nos. 5,634,886, 5,327,887 and Ser. No. 65/295,481.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a portable cardiopulmonary resuscitation device with precise compression depth and uniformity, which includes a frame body and a compression mechanism. The compression mechanism has a handle connected with a connecting bar for operating a plunger. A depth controlling scale is disposed on the frame body for presetting the compression depth of the plunger. Therefore, even a less experienced or non-expert person can perform chest compression at a precise depth.
It is a further object of the present invention to provide the above portable cardiopulmonary resuscitation device which is composed of few components so that the total weight of the cardiopulmonary resuscitation device is reduced and easy to carry . In addition, a rescuer can sit on the sitting bars of the frame body with the weight of the rescuer offsetting the reaction force produced during compression of the heart. Therefore, the heavy platform is unnecessary and it is no need to relocate the victim to the space under the frame body. Instead, the CPR device can be directly placed on the victim. This saves rescue time and efforts.
It is still a further object of the present invention to provide the above portable cardiopulmonary resuscitation device, in which the compression depth can be adjusted and presetted.
It is a further object of the present invention to provide the above portable cardiopulmonary resuscitation device, in which the compression mechanism can be kept operating in a perpendicular direction.
It is still a further object of the present invention to provide the above portable cardiopulmonary resuscitation device in which a base board can be added for fixing the frame body thereon. The base board can be secured on an ambulance cot. Accordingly, the cardiopulmonary resuscitation can be also performed in a moving ambulance.
According to the above objects, the portable cardiopulmonary resuscitation device according to the present invention includes a frame body and a compression mechanism associate with the frame body. The frame body is composed of two transverse beams and two U-shaped bars which are perpendicularly connected with the transverse beams to form the frame body with four supporting legs. The compression mechanism includes a connecting bar one end of which is pivotally connected with one of the transverse beams of the frame body, while the other end of which is a free end connected with a handle positioned above the other transverse beam for up and down movement and operation. The other transverse beam serves as a stopper for stopping the pressed down connecting bar. A set of movable sleeve and retaining shaft are disposed on at least one side of or above or below the connecting bar. The movable sleeve, such as a linear bearing, is fitted around the vertical retaining shaft and restricted thereby to move only up and down. The movable sleeve is connected with the connecting bar, while the vertical retaining shaft is fixed on the frame body via a fixing frame and bridge bars so as to ensure up and down movement of the connecting bar. A compression depth adjusting mechanism is disposed on the connecting bar for adjusting the compression depth of the connecting bar. A lower end of the compression depth adjusting mechanism is connected with a plunger for compressing the heart portion of a victim. Two sitting bars are connected between the two transverse beams of the frame body. When rescuing a victim, a rescuer can sit on the sitting bars with the rescue's weight offsetting a reaction force produced in compression of the heart. The frame body can be associated with a base board which is fixed on an emergency litter, enabling a rescuer to perform cardiopulmonary resuscitation in a moving ambulance.
The present invention can be best understood through the following description and accompanying drawings wherein:
REFERENCES:
patent: 3078843 (1963-02-01), Brisson
patent: 3739771 (1973-06-01), Gaquer et al.
patent: 3782371 (1974-01-01), Derouineau
patent: 4686968 (1987-08-01), Scherger
patent: 5184606 (1993-02-01), Csorba
Dougherty & Troxell
Yu Justine R.
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