Tracheal tube and method of assembling a tracheostomy tube
A paediatric tracheostomy tube is provided in two parts. One part is a patient end portion ( 13 ) having a silicone shaft ( 10 ) arranged to locate in the trachea. The machine end is formed with a mounting flange ( 20 ) adapted to lie against the neck and has a low profile coupling ( 21 ) on its machine side. The other part is a machine end portion ( 23 ) having a flexible, corrugated shaft ( 10 ′) of polypropylene with a low profile coupling ( 26 ) at its patient end adapted to engage the coupling ( 21 ) on the flange as a twist fit. The machine end of the machine end portion ( 23 ) has a tapered male coupling ( 25 ) adapted to fit with a female coupling on a breathing tube, the male coupling having a larger profile than the coupling ( 26 ) on the patient end of the machine end portion ( 23 ) and the coupling ( 21 ) on the flange.
1. A tracheal tube having a shaft with a patient end portion adapted to extend into a body forwardly of a mounting flange and a machine end portion adapted to project rearwardly of the flange away from a patient, characterised in that the machine end portion is formed separately of the patient end portion and has a shaft provided at its machine end with a male mating coupling adapted for mating connection with a female mating coupling, that a machine side of the mounting flange and a patient end of the machine end portion are provided with engaging couplings of a lower profile than the male mating coupling at the machine end of the machine end portion, and that the shaft of the machine end portion has multiple recesses in its external surface arranged to increase the flexibility of the shaft of the machine end portion, wherein the engaging couplings are locking ring couplings that engage to each other by twisting, and wherein the machine end portion is removable from the patient end portion.
2. A tracheal tube according to claim 1 , characterised in that the recesses are provided by a series of corrugations along the machine end portion.
3. A tracheal tube according to claim 2 , characterised in that the series of corrugations are formed on both the external and internal surface of the shaft of the machine end portion.
4. A tracheal tube according to claim 1 , characterised in that the engaging couplings on the mounting flange and on the patient end of the machine end portion are provided by teeth that engage one another when one part is twisted relative to the other.
5. A tracheal tube according to claim 1 , characterised in that the patient end portion of the tube is of a silicone material.
6. A tracheal tube according to claim 1 , characterised in that the shaft of the machine end portion is of polypropylene.
7. A tracheal tube according to claim 1 , wherein the tube is a tracheostomy tube.
8. A tracheal tube according to claim 1 , wherein the tube is a pediatric tube.
9. A method of assembling a tracheostomy tube including the steps of: providing a patient end portion with a mounting flange and a shaft adapted to extend into a body forwardly of the mounting flange, a machine side of the mounting flange being provided with a low profile coupling; providing a machine end portion having a shaft with a male tapered coupling at its machine end adapted for mating connection with a female tapered coupling, the shaft of the machine end portion being formed with recesses on its external surface arranged to increase the flexibility of the shaft, a patient end of the machine end portion being provided with a low profile coupling, the couplings on the mounting flange and at the patient end of the machine end portion are locking ring couplings having a lower profile than the male tapered coupling at the machine end of the machine end portion and are adapted to engage to each other by twisting; and removably fitting the coupling at the patient end of the machine end portion to the coupling on the mounting flange to join the machine end portion with the patient end portion.
10. A method of making a tracheostomy tube having a patient end portion adapted to extend into a body of a patient forwardly of a mounting flange and a machine end portion formed with recesses on its external surface adapted to project rearwardly of the flange away from the patient, respective low profile twist locking couplings on a machine end of the flange and on a patient end of the machine end portion adapted to engage to each other, the locking couplings each having a lower profile than a male mating coupling at a machine end of the machine end portion, the machine end portion being removable from the patient end portion, wherein the tracheostomy tube is assembled by comprising the steps of:
providing a shaft including a body with the patient end portion forward of the mounting flange and the machine end portion rearwardly of the flange;
providing a machine side of the mounting flange with one of the low profile locking couplings;
providing the machine end portion with the male mating coupling at its machine end adapted for mating connection with a female mating coupling, forming the recess on the external surface of the machine end portion to increase the flexibility of the shaft, and providing the patient end of the machine end portion with the other of the low profile locking couplings
configuring the low profile locking couplings on the mounting flange and at the patient end of the machine end portion as locking couplings adapted to engage to each other by twisting, and configuring the locking couplings to have a lower profile than the male mating coupling at the machine end of the machine end portion; and
removably fitting the low profile locking coupling at the patient end of the machine end portion to the low profile locking coupling on the mounting flange to join the machine end portion with the patient end portion.