All-in one syringe assembly for blood draws and medicine delivery to patients

Abstract

A syringe assembly includes (i) a syringe with a cylindrical body, luer tip at a first end, finger grip at a second end and a cannula extending from the luer tip into the cylindrical body, and (ii) a plunger unit having an adapter portion, receiving cavity, finger grip and piston. A channel extends the length of the adapter portion to receive the cannula in one end and a variety of connectors, valves and/or syringes in a second end. The end of the channel accessible in the receiving cavity mates with or engages any number of commercially available valves, connectors and/or syringes while the luer tip similarly connects to any number of valves, catheters, connectors, etc., depending on the task being undertaken with the syringe assembly.

We claim: 
     
         1 . A syringe assembly comprising:
 a syringe having a tapered body with a luer at a first end, said luer having an exit opening, said taper from smaller to larger towards said luer;   a plunger unit including an adapter portion and a receiving cavity, a first end of said adapter portion retaining a piston, said plunger unit insertable into a second end of said syringe and slidable within said cylindrical body during which said piston creates a fluid seal with an interior surface of said cylindrical body, said adapter portion including a channel extending along its length to an opening at a bottom of said receiving cavity for insertion of an intermediary connector or valve, said piston configured to frictionally interact with an inner surface of said cylindrical body to create a vacuum therewithin and prevent said plunger unit from disengaging said tapered body of said syringe; and   a cannula secured at one end within said luer and extending into said piston and extendable into said channel as said plunger unit is inserted farther into said syringe.   
     
     
         2 . The syringe assembly of  claim 1  wherein said taper acts as a lock to maintain said plunger unit from disengaging from said syringe body. 
     
     
         3 . The syringe assembly of  claim 2  wherein said taper acts to prevent said piston from exiting said syringe body thereby locking said plunger unit in place. 
     
     
         4 . The syringe assembly of  claim 1  wherein said tapered body is cylindrical and said piston is circular. 
     
     
         5 . A syringe assembly comprising:
 a syringe having a cylindrical body with a luer at a first end, said luer having an exit opening;   a plunger unit including an adapter portion and a receiving cavity, a first end of said adapter portion retaining a piston, said plunger unit insertable into a second end of said syringe and slidable within said cylindrical body during which said piston creates a fluid seal with an interior surface of said cylindrical body, said adapter portion including a channel extending along its length to an opening at a bottom of said receiving cavity for insertion of an intermediary connector or valve, said piston dimensioned to frictionally interact with an inner surface of said cylindrical body to create a vacuum therewithin and prevent said plunger unit from being pulled from said cylindrical body of said syringe; and   a cannula secured at one end within said luer and extending into said piston and extendable into said channel as said plunger unit is inserted farther into said syringe.   
     
     
         6 . The syringe assembly of  claim 5  wherein said cylindrical body is tapered from smaller to larger towards said luer. 
     
     
         7 . The syringe assembly of  claim 6  wherein said tapered cylindrical body and said piston act as a lock to maintain said plunger unit from disengaging from said syringe body. 
     
     
         8 . The syringe assembly of  claim 6  wherein said taper acts to prevent said piston from exiting said cylindrical body thereby locking said plunger unit in place. 
     
     
         9 . The syringe assembly of  claim 5  wherein said tapered body is cylindrical and said piston is circular. 
     
     
         10 . A syringe assembly comprising:
 a syringe having a tapered body with a luer at a first end, said luer having an exit opening, said taper from smaller to larger towards said luer;   a plunger unit including an adapter portion and a receiving cavity, a first end of said adapter portion retaining a piston, said plunger unit insertable into a second end of said syringe and slidable within said cylindrical body during which said piston creates a fluid seal with an interior surface of said cylindrical body, said adapter portion including a channel extending along its length to an opening at a bottom of said receiving cavity for insertion of an intermediary connector or valve, said piston configured to frictionally interact with an inner surface of said cylindrical body to prevent said plunger unit from disengaging said tapered body of said syringe; and   a cannula secured at one end within said luer and extending into said piston and extendable into said channel as said plunger unit is inserted farther into said syringe.   
     
     
         11 . The syringe assembly of  claim 10  wherein said taper acts as a lock to maintain said plunger unit from disengaging from said syringe body. 
     
     
         12 . The syringe assembly of  claim 11  wherein said taper acts to prevent said piston from exiting said syringe body thereby locking said plunger unit in place. 
     
     
         13 . The syringe assembly of  claim 10  wherein said tapered body is cylindrical and said piston is circular.