Method of using a medical instrument

Abstract

A method includes actuating a lever to move a cannula of a medical instrument from a first extended position to second retracted position; and actuating the lever to move a stylet of the medical instrument from a third extended position to a fourth retracted position. Actuating the lever comprises moving the lever from a first lever position spaced apart from a housing of the medical instrument to a second lever position closer to the housing

1 . A method comprising: 
 actuating a lever to move a cannula of a medical instrument from a first extended position to second retracted position; and    actuating the lever to move a stylet of the medical instrument from a third extended position to a fourth retracted position;    wherein actuating the lever comprises moving the lever from a first lever position spaced apart from a housing of the medical instrument to a second lever position closer to the housing.    
   
   
       2 . The method of  claim 1  further comprising releasing the lever after the cannula is moved to the second retracted position.  
   
   
       3 . The method of  claim 2  further comprising moving a linkage attached to the lever from a first linkage position in which the linkage is capable of moving the cannula to the second retracted position without moving the stylet to a different second linkage position in which the linkage is capable of moving the stylet to the fourth retracted position.  
   
   
       4 . The method of  claim 1  further comprising locking the lever after the stylet is moved.  
   
   
       5 . The method of  claim 1  further comprising sliding a trigger to release the stylet from the fourth retracted position.  
   
   
       6 . The method of  claim 1  further comprising pushing a trigger to release the stylet from the fourth retracted position.  
   
   
       7 . The method of  claim 1  wherein the cannula is moved to the second retracted position without moving the stylet.  
   
   
       8 . A method comprising: 
 actuating a lever to move a cannula of a medical instrument from a first extended position to second retracted position;    moving a linkage attached to the lever from a first linkage position in which the linkage is capable of moving the cannula to the second retracted position without moving the stylet to a different second linkage position in which the linkage is capable of moving the stylet to the fourth retracted position; and    actuating the lever to move a stylet of the medical instrument from a third extended position to a fourth retracted position.    
   
   
       9 . The method of  claim 8  further comprising locking the lever after the stylet is moved.  
   
   
       10 . The method of  claim 8  further comprising sliding a trigger to release the stylet from the fourth retracted position.  
   
   
       11 . The method of  claim 8  further comprising pushing a trigger to release the stylet from the fourth retracted position.  
   
   
       12 . The method of  claim 8  wherein actuating the lever comprises moving the lever from a first lever position spaced apart from a housing of the medical instrument to a second lever position closer to the housing.  
   
   
       13 . A method comprising: 
 pivotally actuating a lever to move a stylet from an extended position to a retracted position;    wherein actuating the lever comprises moving the lever from a first lever position spaced apart from a housing of the medical instrument to a second lever position closer to the housing.