Apparatus for clearing tubing and related method
An apparatus for clearing tubing includes a grip assembly connected to the pair of rollers. The grip assembly is operable to move the rollers to engage the tubing therebetween. The movement of the grip assembly is limited such that a minimum tubing gap between the rollers is equal to approximately twice a wall thickness of the tubing. The rollers are moved along the tubing to clear obstructions. The apparatus can also include a clamp assembly having one or more plates that limits movement of the grip assembly to bring the rollers no closer than the minimum tubing gap. Alternately, the grip assembly can include first and second shell halves movable between open and closed positions with a channel defined therebetween, and the rollers are mounted in the grip assembly.
1. An apparatus for clearing surgical tubing, the apparatus comprising:
a pair of rollers; and
a grip assembly connected to the pair of rollers;
wherein the grip assembly is operable to move the rollers to engage the tubing therebetween, the movement of the rollers being limited by the grip assembly such that a minimum tubing gap between the rollers is equal to approximately twice an uncompressed wall thickness of the tubing such that the tubing is closed but the tubing wall is not squeezed to less than the uncompressed wall thickness, the grip assembly being further operable to slide along the tubing with the rollers; and wherein the grip assembly includes first and second shell halves movable between open and closed positions with a channel defined therebetween, and the rollers are mounted in the grip assembly, engagement between the first and second shell halves in the closed position preventing bringing the rollers together to less than the minimum tubing gap.
2. The apparatus of claim 1 , wherein at least one of the rollers is rotatably mounted.
3. The apparatus of claim 1 , wherein the each shell half includes a pair of roller mounting brackets, and the rollers include reduced diameter end portions that snap fit into the roller mounting brackets.
4. The apparatus of claim 1 , wherein each shell half includes a channel half defined therein, the channel halves defining the channel with the shell halves in the closed position.
5. The apparatus of claim 4 , wherein a gap is formed in each channel half and each shell half includes a pair of roller mounting brackets on opposite sides of the gap.
6. The apparatus of claim 4 , wherein the channel halves include rounded edges at respective ends thereof.
7. The apparatus of claim 1 , wherein the first and second shell halves have complementary engagement elements.
8. The apparatus of claim 1 , wherein the first and second shell halves are connected by a hinge.
9. A method of clearing tubing, the method comprising:
arranging the tubing between a pair of opposed rollers;
bringing the rollers together to a distance of approximately two times an uncompressed wall thickness of the tubing such that the tubing is closed but the tubing wall is not squeezed between the rollers to less than the uncompressed wall thickness; and
moving the rollers along the tubing; wherein bringing the rollers together includes operating a grip assembly, the grip assembly being limited such that the rollers cannot be brought together to more than the distance approximately two times the wall thickness of the tubing; and wherein the operating the grip assembly includes closing first and second shell halves having the rollers mounted therein, engagement between the shell halves when brought together effecting the limitation of roller movement.
10. A tube clearing apparatus for clearing surgical tubing having an uncompressed wall thickness, the tube clearing apparatus comprising:
a pair of rollers;
a grip assembly holding the pair of rollers such that the grip assembly and rollers can slide along the surgical tubing for the clearing thereof, the grip assembly including pair of shell halves movable between an open position, in which the surgical tubing can be placed therebetween, and a closed position, in which the rollers are brought into proximity on opposite sides of the surgical tubing, engagement between the shell halves in the closed position preventing bringing the rollers closer together than a minimum tubing gap therebetween, the minimum tubing gap being equal to approximately two times the uncompressed wall thickness of the surgical tubing such that the tubing is closed but the tubing wall is not squeezed between the rollers to less than the uncompressed wall thickness.
11. The apparatus of claim 10 , wherein channel halves defined in each of the shell halves further define a tubing channel when the shell halves are in the closed position with openings at opposite ends thereof, the channel being divided into two portions, each portion leading from one of the openings to the rollers.
12. The apparatus of claim 10 , wherein the shell halves are connected by a hinge.
13. The apparatus of claim 12 , wherein the hinge and shell halves are integrally formed as a single unit.
14. The apparatus of claim 10 , further comprising the surgical tubing arranged between the rollers.