Skin nicking device for catheter placement system
A catheter placement system including a catheter, a needle for creating an insertion site, and a skin nicking device for enlarging the insertion site. A catheter placement device includes the skin nicking device slidably coupled with the needle, where the skin nicking device has one or more blades attached to a frame thereof. Distally displacing the skin nicking device along the needle causes the blade to nick the skin to enlarge the insertion site. A shield of the skin nicking device transitions between a safe configuration encapsulating the blade and a use configuration exposing the blade and the shield may be biased toward the safe configuration. A latch secures the shield in the safe configuration and an actuator releases the latch. A sheath of the skin nicking device includes the needle slidably disposed within a lumen thereof and a sharp tip of the blade embedded within a wall thereof.
1 . A catheter placement device, comprising:
a needle configured to establish an insertion site for a vascular catheter, the needle defining a needle lumen extending between a distal end and a needle hub at a proximal end; and
a skin nicking device slidably coupled with the needle, the skin nicking device comprising:
a blade configured to nick a skin adjacent the insertion site to enlarge the insertion site;
a shield transitionable between:
a safe configuration, wherein the blade is encapsulated by the shield, and
a use configuration, wherein the blade is exposed for use in nicking the skin;
a frame coupled with the blade and the shield; and
a latch operatively coupled between the shield and the frame, wherein the latch is configured to prevent the shield from transitioning away from the safe configuration toward the use configuration in an absence of a deliberate action by a clinician.
2 . The device according to claim 1 , wherein the frame is coupled with the needle hub such that the frame is positionally retained by the needle hub in the absence of a separating force applied to the skin nicking device by the clinician.
3 . The device according to claim 1 , wherein the shield is rotatably coupled with the frame such that the shield is rotatable between the safe configuration and the use configuration.
4 . The device according to claim 1 , wherein the shield is slidably coupled with the frame such that the shield is displaceable between the safe configuration and the use configuration.
5 . The device according to claim 4 , wherein the shield is longitudinally displaceable between:
a distal position corresponding to the safe configuration, and
a proximal position corresponding to the use configuration.
6 . The device according to claim 1 , wherein the shield is biased toward the safe configuration.
7 . The device according to claim 1 , wherein the latch includes an actuator configured to release the latch as a result of the deliberate action, thereby allowing the shield to transition away from the safe configuration toward the use configuration.
8 . The device according to claim 1 , wherein the blade is fixedly attached to the frame such that the blade extends distally away from the frame.
9 . The device according to claim 1 , wherein:
the blade includes a sharp edge and a dull edge,
the sharp edge faces away from the dull edge, and
the sharp edge is disposed at an angle with respect to the dull edge.
10 . The device according to claim 9 , wherein the sharp edge and the dull edge converge to define a sharp tip at a distal end of the blade.
11 . The device according to claim 10 , wherein the blade is fixedly attached to the frame such that:
the dull edge faces the needle,
the sharp edge faces radially away from the needle, and
the sharp tip is disposed immediately adjacent the needle.
12 . The device according to claim 1 , wherein:
the skin nicking device includes a tubular sheath coupled with the frame so that the tubular sheath extends distally away from the frame along the needle, and
the needle is disposed within a lumen of the tubular sheath.
13 . The device according to claim 12 , wherein a sharp tip is disposed radially inward of an outside diameter surface of the tubular sheath.
14 . The device according to claim 12 , wherein a sharp tip is embedded within a wall of the tubular sheath.
15 . The device according to claim 1 , wherein the skin nicking device includes a second blade fixedly coupled with the frame such that the second blade is disposed opposite the blade.
16 . The device according to claim 15 , wherein the shield is configured to:
encapsulate the second blade in the safe configuration, and
expose the second blade in the use configuration.
17 . A method of placing a catheter within a patient vasculature, comprising:
accessing a blood vessel using a needle to define an insertion site for the catheter;
releasing a latch operatively coupled between a shield of a skin nicking device and a frame of the skin nicking device, wherein the latch is configured to prevent the shield from transitioning away from a safe configuration toward a use configuration in an absence of a deliberate action by a clinician;
transitioning the shield of the skin nicking device coupled with the needle from the safe configuration to the use configuration to expose a blade of the skin nicking device;
distally sliding the skin nicking device along the needle toward the insertion site;
nicking a skin with the blade to enlarge the insertion site; and
placing the catheter within the patient vasculature.
18 . The method according to claim 17 , wherein nicking the skin includes distally sliding the skin nicking device along the needle so that the blade extends into the insertion site.
19 . The method according to claim 17 , further comprising decoupling the frame of the skin nicking device from a needle hub of the needle.
20 . The method according to claim 17 , further comprising transitioning the shield from the use configuration to the safe configuration to encapsulate the blade.
21 . The method according to claim 17 , wherein transitioning the shield includes rotating the shield.
22 . The method according to claim 17 , wherein transitioning the shield from the safe configuration to the use configuration includes slidably displacing the shield from a distal position to a proximal position.
23 . The method according to claim 22 , wherein transitioning the shield from the safe configuration to the use configuration includes:
contacting the skin with the shield; and
distally displacing the skin nicking device further along the needle so that the skin applies a proximally oriented force to the shield to displace the shield away from the distal position toward the proximal position.