Method and apparatus for improved medical device profile

Abstract

The present subject matter includes an apparatus for positioning in an implant site which includes a hermetically sealed shell having an exterior shaped as a function of hydrodynamic drag at the implant site, turbulence at the implant site, fluid sheer stress at the implant site, and stagnation at the implant site; electronics disposed in the hermetically sealed shell and a power source disposed in the hermetically sealed shell.

1 . An implantable device, comprising: 
 an implantable electronics shell;    electronics disposed in the implantable electronics shell;    an implantable power source shell, the implantable power source shell being hermetically sealed to the implantable electronics shell with a first seal, with the electronics disposed outside the implantable power source shell; and    a power source disposed in the implantable power source shell, the power source being sealed in the implantable power source shell with a second seal,    wherein an exterior of the implantable device is defined in part by an exterior of the implantable electronics shell and an exterior of the implantable power source shell.    
   
   
       2 . The implantable device of  claim 1 , wherein the power source is a capacitor.  
   
   
       3 . The implantable device of  claim 1 , wherein the electronics include a pressure transducer.  
   
   
       4 . The implantable device of  claim 1 , wherein the electronics include cardiac rhythm management electronics.  
   
   
       5 . The implantable device of  claim 1 , wherein the electronics include neurostimulation electronics.  
   
   
       6 . The implantable device of  claim 1 , wherein the electronics include an ultrasonic transducer.  
   
   
       7 . The implantable device of  claim 1 , wherein the power source includes a battery.  
   
   
       8 . The implantable device of  claim 7 , wherein the power source is a primary battery.  
   
   
       9 . The implantable device of  claim 1 , wherein the exterior of the implantable device is approximately cylindrical.  
   
   
       10 . The implantable device of  claim 9 , wherein the implantable device defines a passage extending through the implantable device.  
   
   
       11 . The implantable device of  claim 10 , wherein the passage extends through the first and implantable power source shells.  
   
   
       12 . The implantable device of  claim 1 , wherein the first seal includes a weld.  
   
   
       13 . The implantable device of  claim 12 , wherein the second seal includes a weld.  
   
   
       14 . The implantable device of  claim 1 , wherein the implantable electronics shell and the implantable power source shell are approximately cylindrical.  
   
   
       15 . The implantable device of  claim 14 , wherein a passage extends through the implantable electronics shell and the implantable power source shell.  
   
   
       16 . A method for constructing a device for an implant site, the method comprising: 
 shaping an exterior of a hermetically sealed shell, comprising: 
 modeling the exterior to provide reduced hydrodynamic drag in conditions measured at the implant site;  
 modeling the exterior to provide reduced turbulence in conditions measured at the implant site;  
 modeling the exterior to provide reduced fluid sheer stress in conditions measured at the implant site; and  
 modeling the exterior to provide reduced stagnation in conditions measured at the implant site.  
   
   
   
       17 . The method of  claim 16 , further comprising: 
 disposing a transducer in the hermetically sealed shell;    disposing a wireless transmitter in the hermetically sealed shell; and    disposing a power source disposed in the hermetically sealed shell.    
   
   
       18 . The method of  claim 17 , further comprising sensing pressure with the transducer.  
   
   
       19 . The method of  claim 17 , wherein the power source is a battery.  
   
   
       20 . The method of  claim 19 , wherein the battery is a primary battery.  
   
   
       21 . The method of  claim 19 , further comprising stacking into a stack a plurality of substantially planar battery electrode layers in a power source housing of the power source such that the profile of the stack substantially conforms to an interior surface of the hermetically sealed shell.  
   
   
       22 . A system, comprising: 
 an implantable medical device having a handle, the implantable medical device including sensing electronics and a power source; and    a sensor positioning lead having a clasp, the clasp being adapted to removably couple with the handle.    
   
   
       23 . The system of  claim 22 , further comprising a guide catheter, wherein the implantable medical device is sized for passage through the guide catheter and the sensor positioning lead is sized for slidable disposition in the guide catheter.  
   
   
       24 . The system of  claim 22 , wherein the handle includes a cylindrical boss.  
   
   
       25 . The system of  claim 22 , wherein the clasp includes a wire coil adapted to removably coil around the handle.  
   
   
       26 . The system of  claim 22 , wherein the clasp, in a first mode of operation, is expanded to interference fit with an opening of the implantable medical device, and in a second mode of operation, is not interference fit with the opening.  
   
   
       27 . The system of  claim 26 , further comprising a pushwire, which is at least partially disposed through the opening in the first mode of operation, and is not disposed through the opening in a second mode of operation.  
   
   
       28 . The system of  claim 22 , wherein the clasp includes claws adapted to pinch the handle.  
   
   
       29 . The system of  claim 28 , wherein the handle includes a ridge, and the claws are shaped to mate to the ridge.  
   
   
       30 . The system of  claim 22 , wherein the clasp includes a sleeve interference fit around the handle.  
   
   
       31 . The system of  claim 30 , further including a pushwire adapted to push the handle out of the sleeve.