CARDIO-PULMONARY RESUSCITATION AIRWAY VALVE AND DEVICES
A cardio pulmonary CPR device and method provides enhanced circulation by an inventive sequence of states of chest compression and airway valve opening and closure. The embodiments of the invention produce enhanced circulation during cardiac arrest, while maintaining a degree of ventilation to the patient, including oxygen delivery in some embodiments. Some embodiments include mechanical compression units. Other embodiments include a compression sensor to detect manually delivered compressions. Embodiments include a simplified and compact airway valve.
1 . An airway valve for a cardio-pulmonary resuscitation apparatus to assist in the rescue of a patient in cardiac arrest, comprising:
a plunger including ferromagnetic material with parts of at least two widths, the plunger including a first sealing surface at the largest width part, and
an electric solenoid to electromagnetically attract the plunger when the solenoid is energized, and
a valve body holding the solenoid and allowing respiratory gas flow around the solenoid, the valve body enclosing the solenoid and plunger, the valve body including a second sealing surface that couples with the first sealing surface of the plunger according to the energy state of the solenoid, and
a spring acting between the solenoid and the plunger.
2 . The airway valve of claim 1 , wherein the plunger has at least three widths, and wherein the solenoid surrounds the second largest width part, but not the largest width part that includes the first sealing surface.
3 . The airway valve of claim 1 , wherein the valve body is transparent.
4 . The airway valve of claim 1 , wherein the solenoid and plunger are held centered inside the valve body.
5 . A cardio-pulmonary resuscitation apparatus to assist in the rescue of a patient in cardiac arrest, comprising:
sealing means to control the airway of the patient, and
a valve that in combination with said sealing means is configured to open and close the airway of the patient, and
means to actuate the valve, and
a mechanical ventilation device to actively inflate the lungs, and
means to deliver mechanical compressions to the chest of the patient, and
a control unit, coupled to said valve actuating means and to said mechanical ventilation device and to said mechanical compression delivery means, the control unit configured to actuate the valve, the mechanical ventilation device, and the mechanical compression delivery means, so as to effect the sequence of states consisting of:
a) 1 to 10 compressions and decompressions with a closed airway,
b) compressed chest with open airway to ventilate respiratory gas out of the lungs of the patient,
c) 1 to 10 compressions and decompressions with a closed airway,
d) decompressed chest with active lung inflation to ventilate respiratory gas into the lungs of the patient.
6 . A cardio-pulmonary resuscitation method to assist in the rescue of a patient in cardiac arrest, comprising:
providing a sealing means to control the airway of the patient, and
providing a valve that in combination with said sealing means is configured to open and close the airway of the patient, and
providing means to actuate the valve, and
providing a mechanical ventilation device to actively inflate the lungs, and providing means to deliver mechanical compressions to the chest of the patient, and
providing a control unit, coupled to said valve actuating means and to said mechanical ventilation device and to said mechanical compression delivery means, the control unit configured to actuate the valve, the mechanical ventilation device, and the mechanical compression delivery means, so as to effect the sequence of states consisting of:
a) 1 to 10 compressions and decompressions with a closed airway,
b) compressed chest with open airway to ventilate respiratory gas out of the lungs of the patient,
c) 1 to 10 compressions and decompressions with a closed airway,
d) decompressed chest with active lung inflation to ventilate respiratory gas into the lungs of the patient.
7 . A cardio-pulmonary resuscitation apparatus to assist in the rescue of a patient in cardiac arrest, comprising:
sealing means to control the airway of the patient, and
an airway valve that in combination with said sealing means is configured to open and close the airway of the patient, and
means to actuate the airway valve, and
an oxygen source to provide oxygen to the patient, and
an oxygen line to deliver oxygen at the airway of the patient, and an oxygen valve to control oxygen flow, and
an oxygen valve actuator, and
means to deliver mechanical compressions to the chest of the patient, and
a control unit, coupled to said airway valve actuating means and to said oxygen valve actuator and to said mechanical compression delivery means, the control unit configured to actuate the airway valve, the oxygen valve and the mechanical compression delivery means, so as to effect the sequence of states consisting of:
a) 1 to 10 compressions and decompressions with a closed airway,
b) compressed chest with open airway to ventilate respiratory gas out of the lungs of the patient,
c) 1 to 10 compressions and decompressions with a closed airway,
d) decompressed chest with the oxygen valve open to ventilate oxygen into the lungs of the patient.
8 . A method for cardio-pulmonary resuscitation to assist in the rescue of a patient in cardiac arrest, comprising:
providing sealing means to control the airway of the patient, and
providing a valve that in combination with said sealing means is configured to open and close the airway of the patient, and
providing means to actuate the valve, and providing a beeper to audibly cue the rescuer, and
providing sensor means to sense compressions on the chest of the patient, and
providing a control unit, coupled to said valve actuating means and to said sensor means and to said beeper, the control unit configured to audibly cue the rescuer to deliver chest compressions at a rate between 80 and 120 per minute, and to use the sensor information to actuate the valve, so as to effect the sequence of states consisting of:
a) closing the airway during a sensed compression,
b) closing the airway during a sensed decompression,
c) opening the airway to ventilate respiratory gas out of the lungs of the patient during a sensed compression,
d) closing the airway during a sensed decompression,
e) opening the airway to ventilate respiratory gas into the lungs of the patient during a sensed decompression.
9 . The airway valve of claim 1 wherein the valve body includes a 15 millimeter connector and a 22 millimeter connector.
10 . The airway valve of claim 1 wherein the spring keeps the first and second sealing surfaces at a fixed distance to each other when the solenoid is not energized.
11 . The airway valve of claim 1 wherein said parts of at least two widths are parts of at least two diameters.
12 . The airway valve of claim 1 wherein a first electric current activates said solenoid when said plunger is separated from said solenoid and said first current is higher than a second electric current that activates said solenoid after said plunger has been moved closer to said solenoid.