Wire introduction device
A deep vein intravenous introducer has a wheel located toward the front end of the device that can be rotated by the index finger of the user. After placement of the needle in the lumen of the vessel, the user rotates the wheel, which turns a drive wheel. The drive wheel has an outer surface that advances the guide wire through the center of the needle and into the patient. Once the guide wire is advanced into the vessel lumen the catheter can be advanced over the guide wire with a hub or finger tab on the catheter close to the index finger. The operation can be performed by one hand without moving the hand from its initial position.
1 . A wire introduction device comprising:
a housing comprising:
a rear housing end;
a front housing end connected at a front end of the rear housing end;
a front opening in the front housing;
a drive wheel assembly positioned in the rear housing end;
a support plate positioned in the front housing end proximate the front end of the rear housing end;
a slip connector having a slip connector rear portion and a slip connector mid-portion that are positioned within the front housing end proximal of the front opening of the housing and a slip connector front portion that extends distally from the front opening of the housing;
a needle mating tip configured to receive a needle assembly and extend through the slip connector and through the front opening of the housing; and
a spring received in the front housing and configured to bias the needle mating tip and the front portion of the slip connector to extend through the front opening of the housing.
2 . The wire introduction device of claim 1 , wherein the support plate is substantially annular with a central opening configured to allow a guide wire to extend there through.
3 . The wire introduction device of claim 1 , wherein:
the spring is positioned adjacent to the support plate to press against the support plate.
4 . The wire introduction device of claim 3 , wherein the slip connector is positioned forward of the spring, such that the spring is configured to be compressed between the support plate and the slip connector.
5 . The wire introduction device of claim 1 , wherein the rear housing end is ergonomically shaped to be grasped by a user's hand, wherein the front housing end is annular, and wherein the support plate is annular.
6 . The wire introduction device of claim 1 , comprising a guide wheel assembly positioned in the rear housing end.
7 . The wire introduction device of claim 6 , wherein the guide wheel assembly includes opposite guide wheels rotatably supported in the rear housing and partially exposed through a middle opening of the rear housing.
8 . The wire introduction device of claim 7 , wherein the guide wheel assembly includes a spacer plate disposed between the opposite guide wheels and defining a radial space between the opposite guide wheels.
9 . The wire introduction device of claim 8 , wherein the radial space is configured to permit a guide wire to pass through between the opposite guide wheels.
10 . The wire introduction device of claim 7 , wherein the drive wheel assembly includes a drive wheel rotatably mounted in the rear housing and engaged with one of the opposite guide wheels.
11 . The wire introduction device of claim 10 , wherein rotation of the opposite guide wheels is configured to cause the drive wheel to rotate.
12 . The wire introduction device of claim 10 , wherein the drive wheel assembly includes a wheel plate connected to the drive wheel, the wheel plate includes a circumferential surface that is configured to contact a guide wire.
13 . The wire introduction device of claim 12 , wherein the wheel plate has an outer circumference that includes a frictional material configured to grip the guide wire.
14 . The wire introduction device of claim 12 , and further comprising a contact peg in the rear housing and configured to engage a guide wire against the wheel plate.
15 . The wire introduction device of claim 14 , wherein the wheel plate contacts a top side of the guide wire and the peg contacts a bottom side of the guide wire.
16 . The wire introduction device of claim 12 , wherein, a guide wire moves longitudinally responsive to rotation of the opposite guide wheels.
17 . The wire introduction device of claim 12 , wherein a portion of the drive wheel is located outside of a top opening in the rear housing.
18 . The wire introduction device of claim 1 , and further comprising a plurality of guide assemblies positioned in the rear housing end and along a length of a guide wire.
19 . The wire introduction device of claim 1 , and further comprising a rear opening located at a rear end of the rear housing, wherein a guide wire extends through the rear opening.
20 . The wire introduction device of claim 19 , and further comprising a sheath positioned around the guide wire at the rear opening of the rear housing.
21 . The wire introduction device of claim 1 , wherein the slip connector mid-portion and the slip connector rear portion each have a first outer diameter that is larger than a second outer diameter of the slip connector front portion.
22 . The wire introduction device of claim 1 , wherein the slip connector rear portion has an interior central bore that a rear portion bore diameter that is wider than a distal bore diameter that extends through the slip connector mid-portion and slip connector front portion.