Implantable medical device with pressure sensor
First Claim
1. A leadless cardiac pacemaker (LCP) configured to sense cardiac activity and to pace a patient'"'"'s heart, the LCP comprising:
- a housing having a proximal end and a distal end;
a fixation member configured for fixing the housing to an inner wall of the patient'"'"'s heart such that both the proximal end and the distal end of the housing are located inside of a chamber of the patient'"'"'s heart, the fixation member comprising a plurality of hooks or tines extending distally from the distal end of the housing and into the patient'"'"'s heart to anchor the distal end of the housing to the patient'"'"'s heart;
a first electrode secured relative to the housing and exposed to the environment outside of the housing;
a second electrode secured relative to the housing and exposed to the environment outside of the housing;
the housing having a diaphragm that is exposed to the environment outside of the housing, the diaphragm is positioned on the proximal end of the housing and is responsive to a pressure applied to the diaphragm by the environment outside the proximal end of the housing;
a pressure sensor within the housing, the pressure sensor having a pressure sensor diaphragm that is responsive to a pressure applied to the pressure sensor diaphragm and provides a pressure sensor output signal that is representative of the pressure applied to the pressure sensor diaphragm;
a fluid filled cavity in fluid communication with both the diaphragm of the housing and the pressure sensor diaphragm of the pressure sensor, the fluid filled cavity is configured to communicate a measure related to the pressure applied by the environment to the diaphragm of the housing to the pressure sensor diaphragm of the pressure sensor; and
circuitry in the housing in operative communication with the pressure sensor, the circuitry configured to determine a pressure exterior to the housing based on the pressure sensor output signal, and further configured to provide a plurality of pacing pulses via the first and second electrodes, wherein a timing of at least some of the plurality of pacing pulses is based at least in part on the pressure sensor output signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable medical device (IMD) is configured with a pressure sensor. The IMD includes a housing, a pressure sensor and a fluid filled cavity. The housing has a diaphragm that is exposed to the environment outside of the housing. The pressure sensor has a pressure sensor diaphragm that is responsive to a pressure applied to the pressure sensor diaphragm and provides a pressure sensor output signal that is representative of the pressure applied to the pressure sensor diaphragm. The fluid filled cavity is in fluid communication with both the diaphragm of the housing and the pressure sensor diaphragm of the pressure sensor. The fluid filled cavity is configured to communicate a measure related to the pressure applied by the environment to the diaphragm of the housing to the pressure sensor diaphragm of the pressure sensor.
1317 Citations
19 Claims
-
1. A leadless cardiac pacemaker (LCP) configured to sense cardiac activity and to pace a patient'"'"'s heart, the LCP comprising:
-
a housing having a proximal end and a distal end; a fixation member configured for fixing the housing to an inner wall of the patient'"'"'s heart such that both the proximal end and the distal end of the housing are located inside of a chamber of the patient'"'"'s heart, the fixation member comprising a plurality of hooks or tines extending distally from the distal end of the housing and into the patient'"'"'s heart to anchor the distal end of the housing to the patient'"'"'s heart; a first electrode secured relative to the housing and exposed to the environment outside of the housing; a second electrode secured relative to the housing and exposed to the environment outside of the housing; the housing having a diaphragm that is exposed to the environment outside of the housing, the diaphragm is positioned on the proximal end of the housing and is responsive to a pressure applied to the diaphragm by the environment outside the proximal end of the housing; a pressure sensor within the housing, the pressure sensor having a pressure sensor diaphragm that is responsive to a pressure applied to the pressure sensor diaphragm and provides a pressure sensor output signal that is representative of the pressure applied to the pressure sensor diaphragm; a fluid filled cavity in fluid communication with both the diaphragm of the housing and the pressure sensor diaphragm of the pressure sensor, the fluid filled cavity is configured to communicate a measure related to the pressure applied by the environment to the diaphragm of the housing to the pressure sensor diaphragm of the pressure sensor; and circuitry in the housing in operative communication with the pressure sensor, the circuitry configured to determine a pressure exterior to the housing based on the pressure sensor output signal, and further configured to provide a plurality of pacing pulses via the first and second electrodes, wherein a timing of at least some of the plurality of pacing pulses is based at least in part on the pressure sensor output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A leadless cardiac pacemaker (LCP) configured to sense cardiac activity and to pace a patient'"'"'s heart, the LCP comprising:
-
a housing having an elongated body with a proximal end having a proximal end surface facing proximally and a distal end having a distal end surface facing distally;
a first electrode secured relative to the housing and exposed to the environment outside of the housing;
a second electrode secured relative to the housing and exposed to the environment outside of the housing;a fixation member at the distal end of the housing configured for fixing the distal end of the housing to an inner wall of a chamber of the patient'"'"'s heart with the proximal end of the housing extending away from the inner wall and into the chamber of the patient'"'"'s heart, the fixation member comprising a plurality of hooks or tines extending distally from the distal end of the housing and into the patient'"'"'s heart to anchor the distal end of the housing to the patient'"'"'s heart; the housing having a diaphragm that is exposed to the environment outside of the housing, the diaphragm is responsive to a pressure applied to the diaphragm by the environment outside of the housing, wherein the pressure is a pressure inside of the chamber of the heart; one or more sensors coupled to the diaphragm of the housing for detecting a stress in the diaphragm of the housing, wherein the stress in the diaphragm is representative of the pressure applied to the diaphragm by the environment outside of the housing; circuitry in the housing in operative communication with the one or more sensors for determining a pressure exterior to the housing based at least in part on the detected stress in the diaphragm of the housing; and wherein the diaphragm of the housing is situated on the proximal end surface of the housing. - View Dependent Claims (16, 17, 18)
-
-
19. A leadless cardiac pacemaker (LCP) comprising:
-
a housing having a proximal end and a distal end; a first electrode secured relative to the housing and exposed to the environment outside of the housing; a second electrode secured relative to the housing and exposed to the environment outside of the housing; the housing having a diaphragm that is exposed to the environment outside of the housing, the diaphragm is responsive to a pressure applied to the diaphragm by the environment outside of the housing; a pressure sensor within the housing, the pressure sensor having a pressure sensor diaphragm that is responsive to a pressure applied to the pressure sensor diaphragm and provides a pressure sensor output signal that is representative of the pressure applied to the pressure sensor diaphragm; a sealed fluid filled cavity extending between the diaphragm of the housing and the pressure sensor diaphragm, the sealed fluid filled cavity including a fluid that is in fluid communication with both the diaphragm of the housing and the pressure sensor diaphragm of the pressure sensor, the sealed fluid filled cavity is configured to communicate a measure related to the pressure applied by the environment to the diaphragm of the housing to the pressure sensor diaphragm of the pressure sensor; a component cavity in the housing defined by a component cavity inner wall, the component cavity fluidly isolated from the sealed fluid filled cavity; circuitry mounted in the component cavity in the housing with at least part of the circuitry spaced from the component cavity inner wall, the circuitry in operative communication with the pressure sensor, the circuitry configured to determine a pressure exterior to the housing based on the pressure sensor output signal, and further configured to communicate with another device via the first and second electrodes; a battery mounted in the component cavity in the housing for providing power to the circuitry; the battery and the circuitry both fluidly isolated from the fluid in the sealed fluid filled cavity; and the circuitry configured to provide a plurality of pacing pulses via the first and second electrodes, wherein a timing of at least some of the plurality of pacing pulses is based at least in part on the pressure sensor output signal.
-
Specification