Semi-automatic cannulation device

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• a chamber, wherein the pressure within said chamber is a partial vacuum pressure, said chamber being in communication with said hollow needle.
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means being manually actuable.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• a chamber, wherein the pressure within said chamber is below the atmospheric pressure, said chamber being in communication with said hollow needle;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means being manually actuable.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• a chamber in communication with said hollow needle, said chamber being adapted to receive vacuum pressure upon body tissues sealing of said hollow needle;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means being manually actuable.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• side wall means for defining a blood-receiving chamber having an opening in communication with said hollow needle, through which blood is receivable into said chamber, said chamber including at least one displaceable member to change the volume within said chamber;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber, said actuating means being manually actuable.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• side wall means for defining a blood -receiving chamber having an opening in communication with said hollow needle, through which blood is receivable into said chamber, said chamber including at least one deformable member to change the volume within said chamber;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn by said vacuum pressure toward said chamber.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• means for applying a suction to said hollow needle to cause blood to backflow within said hollow needle upon blood vessel penetration by said hollow needle;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon said backflow of blood occurring upon blood vessel penetration.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• means for accelerating the backflow response time upon blood vessel penetration to cause said propelling means to advance the intravascular catheter immediately upon blood vessel penetration by said hollow needle;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon said accelerated backflow of blood occurring upon blood vessel penetration.

An intravascular catheter device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• means for enhancing the pressure differential between the pressure within the blood vessel and the atmospheric pressure within a chamber in communication with said blood vessel via said hollow needle;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel, upon backflow of blood occurring upon blood vessel penetration, said blood being drawn toward said chamber by said enhanced pressure differential, said actuating means being manually actuable.

An intravascular catheter placement device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• means for sensing pressure differential between the pressure within a penetrated blood vessel and the pressure within a chamber in communication with said blood vessel via said hollow needle, said means for sensing pressure differential resulting in backflow of blood toward said chamber occurring upon blood vessel penetration;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel.

An intravascular catheter placement device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• side wall means for defining a blood-receiving chamber having an opening in communication with said hollow needle, through which blood is receivable into said chamber, said chamber including at least one displaceable member, said displaceable member being displaceable in response to pressure changes occurring within said chamber;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel.

An intravascular catheter placement device for insertion of an intravascular catheter into the interior of a blood vessel comprising:

• an intravascular catheter;
• a hollow needle, said catheter being concentric to said hollow needle;
• side wall means for defining a blood-receiving chamber having an opening in communication with said hollow needle, through which blood is receivable into said chamber, said chamber including at least one deformable member, said deformable member being deformable in response to pressure changes occurring within said chamber;
• means for self-propelled advancement of said intravascular catheter into the interior of a blood vessel;
• means for manually actuating said means for self-propelled advancement of said catheter into the interior of a blood vessel.