A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 1/10 (2006.01) A61B 17/02 (2006.01) A61B 17/34 (2006.01) A61B 17/00 (2006.01) A61B 17/32 (2006.01)
Patent
CA 2120778
2120778 9403228 PCTABS00030 An apparatus and method for cardiac resuscitation, as shown in fig. 9, comprising an expandable member (105) placeable inside the chest cavity adjacent to heart (69) to effect pumping of the heart. Said expandable member is carried in a contracted state within the blunt tip (104) of a stem (102) which is essentially mechanically advanced through the chest wall in a controlled and largely automated fashion by a device (1) placed on the anterior chest wall (107) of the patient. Said blunt tip (104) advances by blunt dissection through the thickness of the chest wall (107), after a slight incision is made in the superficial layers of the chest wall just to win the resistance of the skin to a blunt tip, in a region of the chest wall correspondent to an area, in the inner aspect of the chest wall, anatomically designated ''sine pleura'', i.e. where the pleura is absent, and is placed into the chest cavity into a region adjacent to the heart. Said blunt tip (104) can be of such a small diameter to cause only a virtual, self-sealing hole in the chest wall upon removal of the stem. The device (1) or means for placing said expandable member (104) into the chest cavity comprises a number of other safety features to prevent that structures of the chest wall as well as intrathoracic organs are injured in any way at the time of the placement of the expandable member (105) into the chest cavity as well as at the time of the actual cardiac pumping or at any time the device is being used. Said means (1) for placement of said expandable member (105) into the chest cavity comprises means for gradual and controlled penetration through the chest wall (107), with features automatically disabling the means for advancing said stem, and automatically locking the advancing stem upon entry into the chest cavity, so to avoid injuries to the heart and to the other intrathoracic organs. Upon placement of the expandable member within the chest cavity, cardiac pumping is either accomplished, after initial expansion of the expandable member (105), by periodically displacing said expandable member (105) by appling and releasing pressure to it via a rigid stem (102) from outside the chest cavity, so to alternatally compress and decompress the heart or by alternatively inflating-deflating said expandable member in front of the heart to alternatively compress-decompress the heart against the thoracic spine. Such an apparatus provides an effective method for cardiopulmonary resuscitation comparable to open cardiac massage without the trauma, invasiveness, complication and most of all without the delay in institution associated with a thoracotomy and can be implemented by paramedics or the like in the field, i.e. in the site where the cardiac arrest has occured, within the critical time frame when effective cardiac massage can still regain life and integrity of functions.
Zadini Filiberto P.
Zadini Giorgio C.
French David J.
Zadini Filiberto P.
Zadini Giorgio C.
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