Apparatus and method for catheterization of blood vessels

Abstract

A catheter insertion device is disclosed herein. The device allows an operator to insert a catheter within a vessel with a single hand enabling the operator to keep a grip on the patient's skin and vessel. The device also includes a needle tip sheath that protects operators from accidental needle punctures by contaminated needles.

I claim:  
     
         1 . A catheter insertion device comprising: 
 a. a shaft having a first end and a catheter end, said catheter end configured to releasably engage a hollow catheter having a tip;    b. a sheath positioned on said shaft, said sheath configured to have a passage therethrough, said sheath positioned to align said passage with said catheter;    c. a body slidably positioned on said shaft, said body attachable to a needle and configured to align a needle with said passage of said sheath and with said catheter;    wherein a needle, said sheath, said shaft and said catheter are sized and spaced to position a needle tip of a needle beyond said catheter tip when said body is advanced toward said catheter end of said shaft and to remove the needle tip from within said catheter and to position the needle tip within said passage of said sheath when said body is retracted toward said first end of said shaft.    
     
     
         2 . A device according to  claim 1  wherein said shaft further comprises a clip attaching said catheter to said shaft.  
     
     
         3 . A device according to  claim 2  wherein said clip is engageable with said sheath.  
     
     
         4 . A device according to  claim 2  wherein said clip is engageable with said shaft.  
     
     
         5 . A device according to  claim 2  wherein said clip is configured to fluidly seal said catheter when a needle positioned within said catheter has been removed therefrom.  
     
     
         6 . A device according to  claim 2  further comprising a clamp configured to fluidly seal said catheter when a needle positioned within said catheter has been removed therefrom.  
     
     
         7 . A device according to  claim 2  wherein said body comprises a shaft bore extending therethrough, said shaft slidably engaging said body via said shaft bore.  
     
     
         8 . A device according to  claim 2  wherein said body has exterior surface, said body comprising at least one slot configured along said exterior surface, said slot adapted to allow said shaft to movably engage said body.  
     
     
         9 . A device according to  claim 7  wherein said body comprises a fluid chamber comprising a fluid inlet and a fluid outlet, said fluid inlet connectable to said needle.  
     
     
         10 . A device according to  claim 1  further comprising at least one fastening member configured to substantially fix the position of said catheter.  
     
     
         11 . A device according to  claim 1  further comprising at least one locking member that prevents said needle tip from advancing from said sheath.  
     
     
         12 . A device according to  claim 1  wherein said sheath is sized so that said needle tip is positioned within said sheath when said locking member engages said body.  
     
     
         13 . A device according to  claim 1  further comprising a needle engageable with said body, said needle insertable through said passage in said sheath and insertable through said catheter.  
     
     
         14 . A device according to  claim 1  wherein said sheath is positioned so that the tip of said needle is positioned within said sheath when said needle tip is withdrawn from said catheter.  
     
     
         15 . A device according to  claim 1  wherein said shaft has a horizontal dimension sized so that said needle tip is positioned within said sheath when said locking member engages said body.  
     
     
         16 . A device according to  claim 10  wherein said fastening member comprises at least one section of adhesive material positioned on said catheter, said section adapted to adhere to a patient to substantially fix the position of said catheter.  
     
     
         17 . A device according to  claim 16  wherein said fastening member comprises at least one section of adhesive material positioned on said clip, said section adapted to adhere to a patient to substantially fix the position of said catheter.  
     
     
         18 . A device according to  claim 1  further comprising a backflow chamber.  
     
     
         19 . A device according to  claim 18  wherein said backflow chamber has a volume of at least 1 cc.  
     
     
         20 . A device according to  claim 1  further comprising at least one gauge indicator positioned on said shaft.  
     
     
         21 . A device according to  claim 20  wherein said gauge indicator comprises one or more annular rings positioned around said shaft.  
     
     
         22 . A method for intravenous insertion of a catheter using a catheter insertion device comprising: 
 a. a shaft having a first end and a catheter end, said catheter end configured to releasably engage a hollow catheter having a tip;    b. a sheath positioned on said shaft, said sheath configured to have a passage therethrough, said sheath positioned to align said passage with said catheter;    c. a body slidably positioned on said shaft, said body attachable to a needle and configured to align a needle with said passage of said sheath and with said catheter;    wherein a needle, said sheath, said shaft and said catheter are sized and spaced to position a needle tip of a needle beyond said catheter tip when said body is advanced toward said catheter end of said shaft and to remove the needle tip from within said catheter and to position the needle tip within said passage of said sheath when said body is retracted toward said first end of said shaft;    said method comprising the steps of 
 i. grasping the skin of said patient with one hand in the area of desired catheterization to fix the position of said skin and surrounding tissue relative to a vessel to be catheterized;  
 ii. holding in the other hand said catheter insertion device;  
 iii. inserting said needle and said catheter into said vessel until fluid flows from said vessel through said needle; and,  
 iv. advancing said catheter into said vessel to a desired position;  
   
     
     
         23 . A method according to  claim 22  further comprising the step of retracting said body until said needle tip is covered by said sheath.  
     
     
         24 . A method according to  claim 23  further comprising the step of releasing said catheter from said shaft.  
     
     
         25 . A method according to  claim 24  further comprising the step of fastening said catheter with a fastening member.  
     
     
         26 . A medical device comprising: 
 a. a catheter insertable within a vessel;    b. a catheter insertion device engageable with said catheter;    c. a clamp engageable with said catheter insertion device, said clamp configured to fluidly seal said catheter when said catheter has been positioned within a vessel and when a needle used to insert said catheter within a vessel has been removed from within said catheter.    
     
     
         27 . The device according to  claim 21  wherein said gauge indicator comprises at least one locking mechanism.