TRACHEAL TUBE WITH CONNECTOR INSERT
A tracheal tube assembly includes a connector body, a cannula extending from the connector body, and an insert that provides rigidity to the connector body and retains the cannula in the connector body. The insert has a proximal surface having a first outside diameter substantially the same size as a second outside diameter of the connector body. The cannula has a tapered upper end that fits between conforming tapered sections of the connector body inner surface and the insert. The insert may include features to prevent rotation of the cannula as well as rotation of the insert in the connector body. Features of the insert and connector body may also interface to mechanically retain the insert in the connector body. A fastening component may be provided to aid in the fastening of the insert and cannula to the connector body. Different sizes of cannula may be accommodated by different inserts, while using the same or different connector bodies.
1 . A tracheal tube comprising:
a connector having a generally annular body;
a cannula having an upper end disposed in the annular body; and
an insert disposed in the annular body and having a tubular lower extremity contacting the upper end of the cannula to retain the cannula lodged within the annular body, wherein the insert comprises a proximal flange surface having a first outside diameter substantially the same size as a second outside diameter of the annular body.
2 . The tracheal tube of claim 1 , wherein the first outside diameter is approximately between 1/50 inch and 1/1,000 inch smaller than the second outside diameter.
3 . The tracheal tube of claim 1 , wherein the tubular lower extremity of the insert has an inner diameter approximately equal to an inner diameter of the cannula.
4 . The tracheal tube of claim 1 , wherein the annular body comprises a retaining feature that interfaces with the insert to prevent removal of the insert from the annular body.
5 . The tracheal tube of claim 1 , comprising a fastening component configured to aid in fastening the insert and cannula to the annular body, wherein the fastening component is disposed in a rear end of the annular body.
6 . The tracheal tube of claim 1 , wherein the lower extremity of the insert is tapered to expand the upper end of the cannula towards an inner surface of the connector.
7 . The tracheal tube of claim 1 , wherein the annular body is made of an elastomeric material, and the insert is made of a material harder than the elastomeric material of the annular body.
8 . The tracheal tube of claim 1 , wherein the insert has an inner surface tapered from a first inner diameter within the insert to a second larger inner diameter at an upper end of the insert.
9 . A tracheal tube comprising:
a connector having a generally annular body with an outer surface dimensioned to a standard connector size;
a cannula having an upper end;
an insert disposed in the annular body and having a tubular lower extremity contacting the upper end of the cannula; and
a fastening component disposed on a rear end of the annular body and contacting the insert, wherein the cannula is compressed between the insert and the fastening component to retain the cannula.
10 . The tracheal tube of claim 9 , wherein the fastening component comprises a hook and wherein the insert comprises a groove suitable for engaging the hook.
11 . The tracheal tube of claim 9 , wherein at least a portion of the lower extremity of the insert is tapered to expand the upper end of the cannula towards the inner surface of the annular body.
12 . The tracheal tube of claim 9 , wherein the insert comprises a proximal surface having a first outside diameter substantially the same size as a second outside diameter of the annular body.
13 . The tracheal tube of claim 9 , wherein the annular body comprises an anti-rotation feature that interfaces with the insert to prevent rotation of the insert within the annular body.
14 . The tracheal tube of claim 9 , wherein the annular body comprises a retaining feature that interfaces with the insert to prevent removal of the insert from the annular body.
15 . The tracheal tube of claim 9 , wherein the annular body is made of an elastomeric material, and both the insert and the fastening component are made of a material harder than the elastomeric material of the annular body.
16 . A method for making a tracheal tube, comprising:
inserting an insert into a cannula; and
inserting the insert and cannula into an upper opening of an annular body of a connector to expand and compress an upper end of the cannula against an inner surface of a fastening component or the connector to retain the cannula in the connector, wherein the insert comprises a proximal flange surface having a first outside diameter substantially the same size as a second outside diameter of the annular body.
17 . The method of claim 16 , wherein the first outside diameter is approximately between 1/50 inch and 1/1,000 inch smaller than the second outside diameter.
18 . The method of claim 16 , wherein the annular body is made of an elastomeric material, and both the insert and the fastening component are made of a material harder than the elastomeric material of the annular body.
19 . The method of claim 16 , comprising engaging anti-rotation features of the connector and the insert to prevent rotation of the insert in the connector.
20 . The method of claim 16 , comprising engaging retaining features of the fastening component and the insert to prevent removal of the insert from the connector.