CPR chest compression device
First Claim
Patent Images
1. A chest compression device comprising:
- a means for compressing the chest of a patient;
an encoder scale disposed on the means for compressing;
a scanner disposed such that the scanner can read the encoder scale, wherein the scanner is capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; and
a controller operably connected to the scanner and to the means for compressing, wherein said controller is programmed to control, based on the signal, the operation of the means for compressing.
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Accused Products
Abstract
A resuscitation device for automatic compression of a victim'"'"'s chest using a compression belt which exerts force evenly over the entire thoracic cavity. The belt is constricted and relaxed through a motorized spool assembly that repeatedly tightens the belt and relaxes the belt to provide repeated and rapid chest compression.
60 Citations
34 Claims
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1. A chest compression device comprising:
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a means for compressing the chest of a patient; an encoder scale disposed on the means for compressing; a scanner disposed such that the scanner can read the encoder scale, wherein the scanner is capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; and a controller operably connected to the scanner and to the means for compressing, wherein said controller is programmed to control, based on the signal, the operation of the means for compressing.
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2. A system for performing chest compressions, said system comprising:
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a chest compression device comprising; a compression belt suitable for compressing the chest of a patient; a means for tightening the compression belt operably connected to the compression belt; an encoder operably connected to the chest compression device, said encoder comprising; an encoder scale disposed on a component of the compression device; a scanner capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a controller operably connected to the encoder and to the chest compression device; wherein the controller is programmed to receive the signal and determine, based on the signal, a position of the belt; wherein the controller is further programmed to control, based on the position of the belt, the operation of the compression device. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A chest compression device comprising:
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a compression belt suitable for compressing the chest of a patient; a rotating member operatively connected to the compression belt and to a means for rotating the rotating member, wherein rotation of the rotating member is capable of tightening the compression belt about the chest of a patient; an angular encoder scale disposed on the rotating member; a scanner disposed such that the scanner can read the angular encoder scale, wherein the scanner is capable of reading the angular encoder scale and generating a signal corresponding to the movement of the angular encoder scale; and a controller operably connected to the scanner and to the means for rotating the rotating member, said controller programmed to control, based on the signal, the operation of the means for rotating the rotating member. - View Dependent Claims (10, 11, 12, 13)
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14. A system for performing chest compressions, said system comprising:
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a chest compression device comprising; a compression belt suitable for compressing the chest of a patient; a means for tightening the compression belt operably connected to the compression belt; an encoder operably connected to the chest compression device, said encoder comprising; an encoder scale disposed on a component of the compression device; a scanner capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a controller operably connected to the encoder and to the chest compression device; wherein the controller is programmed to receive the signal and determine, based on the signal, the velocity at which the belt travels; wherein the controller is further programmed to control, based on the velocity at which the belt travels, the operation of the compression device. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A chest compression device comprising:
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a compression belt suitable for compressing the chest of a patient; a rotating member operatively connected to the compression belt and to a means for rotating the rotating member, wherein rotation of the rotating member is capable of tightening the compression belt about the chest of a patient; an angular encoder scale disposed on the rotating member; a scanner disposed such that the scanner can read the angular encoder scale, wherein the scanner is capable of reading the angular encoder scale and generating a signal corresponding to the movement of the angular encoder scale; and a controller operably connected to the scanner and to the means for rotating the rotating member, said controller programmed to control, based on the signal, the operation of the means for rotating the rotating member; wherein the controller is further programmed to determine, based on the signal, a velocity at which the belt travels; and wherein the controller is further programmed to control, based on the velocity at which the belt travels, the operation of the means for rotating the rotating member. - View Dependent Claims (21, 22, 23)
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24. A method of measuring the amount of travel of a chest compression belt during chest compressions, said method comprising the steps of:
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providing a system for performing chest compressions, said system comprising; a chest compression device comprising; a compression belt suitable for compressing the chest of a patient; a means for tightening the compression belt operably connected to the compression belt; an encoder operably connected to the chest compression device, said encoder comprising; an encoder scale disposed on a component of the compression device; a scanner capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a controller operably connected to the encoder and to the chest compression device; wherein the controller is programmed to receive the signal and determine, based on the signal, the amount of travel of the compression belt; repetitively tightening the compression belt with the means for tightening the compression belt; reading the encoder scale with the scanner while tightening the belt, said scanner producing a signal corresponding to the movement of the encoder scale; and determining, with the controller and based on the signal, the amount of travel of the compression belt while tightening the belt. - View Dependent Claims (25)
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26. A method of setting a pre-tension position of a compression belt, said pre-tension position being the position of the compression belt just before beginning each compression, said method comprising the steps of:
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providing a system for performing chest compressions, said system comprising; a chest compression device comprising; a compression belt suitable for compressing the chest of a patient; a means for tightening the compression belt operably connected to the compression belt; an encoder operably connected to the chest compression device, said encoder comprising; an encoder scale disposed on a component of the compression device; a scanner capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a controller operably connected to the encoder and to the chest compression device; wherein the controller is programmed to receive the signal and determine, based on the signal, the velocity at which the compression belt travels; operating the means for tightening the belt to initiate tightening of the compression belt; reading the encoder scale with the scanner while tightening the belt, said scanner producing a signal corresponding to the movement of the encoder scale; determining, with the controller and based on the signal, the velocity at which the compression belt travels; and setting the pre-tension position of the compression belt when the velocity at which the compression belt travels falls below a pre-determined value.
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27. A method of setting a take-up limit for a compression belt, wherein the take-up limit corresponds to the amount of compression belt take-up needed to compress the chest of a patient by a predetermined amount, said patient having an initially unknown chest size, said method comprising the steps of:
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providing a system for performing chest compressions, said system comprising; a chest compression device comprising; a compression belt suitable for compressing the chest of a patient; a means for tightening the compression belt operably connected to the compression belt; an encoder operably connected to the chest compression device, said encoder comprising; an encoder scale disposed on a component of the compression device; a scanner capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a controller operably connected to the encoder and to the chest compression device; wherein the controller is programmed to receive the signal and determine, based on the signal, the amount of travel of the compression belt; wherein the controller is further programmed to receive the signal and determine, based on the signal, the velocity at which the compression belt travels; wherein the controller is further programmed to receive the signal and determine, based on the signal, the distance the chest of the patient is compressed; wherein the controller is further programmed to determine the size of a patient and a take-up limit of the compression belt based on a pre-determined set of pre-tension positions of the compression belt that are provided to the controller; operating the means for tightening the belt to initiate tightening of the compression belt; reading the encoder scale with the scanner while tightening the belt, said scanner producing a signal corresponding to the movement of the encoder scale; determining, with the controller and based on the signal, the velocity at which the compression belt travels; and setting, with the controller, a measured pre-tension position of the compression belt when the velocity at which the compression belt travels falls below a pre-determined value; determining, with the controller, the chest size of the patient by selecting the particular pre-determined chest size that corresponds to the pre-determined pre-tension position that most closely matches the measured pre-tension position of the compression belt; and setting the take-up limit of the compression belt based on the chest size of the patient.
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28. A method of setting a pre-tension position of a compression belt, said pre-tension position being the position of the compression belt just before beginning each compression, said method comprising the steps of:
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providing a chest compression device comprising; a compression belt operably connected to a means for repeatedly tightening the compression belt about the chest of a patient; an encoder scale disposed on the compression belt; a scanner disposed such that the scanner can read the encoder scale, wherein the scanner is capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; wherein the scanner is capable of producing a velocity signal, based upon a scan of the encoder scale, corresponding to the velocity at which the belt travels; a means for measuring force operably connected to the compression belt, said means for measuring force capable of producing a force signal corresponding to the force applied to the compression belt; a controller for receiving the velocity signal and the force signal, wherein the controller is programmed to control the operation of the means for repeatedly tightening the belt based on the velocity signal and the force signal; reading the encoder scale with the scanner as the compression belt travels during compressions, said scanner producing a velocity signal corresponding to the velocity at which the belt travels; measuring, with the means for measuring force, the force applied to the belt during compressions, said means for measuring force producing a force signal corresponding to the force applied to the belt during compressions; setting the pre-tension position of the compression belt based on at least one signal selected from the group consisting of the velocity signal and the force signal. - View Dependent Claims (29, 30, 31)
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32. A method of limiting the maximum travel of a compression belt during chest compressions, said method comprising the steps of:
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providing a chest compression device comprising; a belt adapted to extend at least partially around the chest of the patient, said belt characterized by a paid-out portion and a spooled portion, and said belt having a length; an encoder scale disposed on the belt; a scanner disposed such that the scanner can read the encoder scale, wherein the scanner is capable of reading the encoder scale and generating a signal corresponding the movement of the encoder scale; a spool operably connected to the belt, said spool operable to wind and unwind the belt upon the spool, thereby affecting the lengths of the spooled and paid-out portions of the belt; a motor operably connected to the spool, said motor operable to rotate the spool and to tighten the belt about the chest of the patient; a controller operably connected to the motor, said controller capable of controlling the operation of the motor; a means for measuring force operably connected to the compression belt, said means for measuring force capable of measuring the force applied to the compression belt during compressions and capable of producing a force signal corresponding to the amount of force applied to the compression belt; wherein the controller is programmed to control the operation of the motor in response to the force signal; wherein the scanner is capable of producing, based upon a scan of the encoder scale, a movement signal corresponding to the movement of the compression belt; wherein the controller is programmed to determine, based on the movement signal, a distance signal corresponding to the amount of belt travel and a velocity signal corresponding to the velocity at which the belt travels; wherein the controller is further programmed to control the operation of the motor in response to the distance signal and the velocity signal; wherein the controller is further programmed to determine the size of a patient and a take-up limit of the compression belt based on a pre-determined set of pre-tension positions of the compression belt that are provided to the controller; operating the motor to initiate rotation of the spool and tightening of the belt; reading the encoder scale with the scanner as the belt travels, said scanner producing the movement signal; determining, with the controller and based on the movement signal, the distance signal and the velocity signal; measuring the force applied to the belt during compressions with the means for measuring force, said means for measuring force producing the force signal; setting a measured pre-tension position of the compression belt when the velocity signal falls below a predetermined value and the force signal corresponds to a force in the range of about 0.5 pounds to about 50 pounds, wherein a pre-tension position comprises the position of the compression belt just before beginning each compression; determining, with the controller, the chest size of the patient by selecting the particular pre-determined chest size that corresponds to the pre-determined pre-tension position that most closely matches the measured pre-tension position of the compression belt; and operating the controller, based on the chest size of the patient, to control the motor and the spool to limit the maximum travel of the compression belt to a pre-determined amount of belt travel. - View Dependent Claims (33, 34)
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Specification