Anchored guide tubes for insertion and stabilization of devices in body wall, systems, and methods

1 . A medical device, comprising:

a tube, comprising:

a proximal end,

a distal end,

a lateral wall extending from the proximal end to the distal end of the tube, the lateral wall having an inside surface surrounding a hollow interior of the tube,

an engagement feature on the lateral wall, and

a port proximate the proximal end;

an inflatable member located at a distal end portion of the tube;

a fluid passage fluidically coupling the port and the inflatable member, wherein the fluid passage extends longitudinally within a recessed channel formed in and extending longitudinally along the inside surface of the lateral wall, wherein the recessed channel is open along a side of the channel facing the hollow interior; and

a repositionable anchor located on the tube proximal to the inflatable member and configured to selectively engage the engagement feature;

wherein in a first configuration of the medical device the repositionable anchor is translatable along the tube, and in a second configuration of the medical device the repositionable anchor is fixed in translation relative to the tube; and

wherein the recessed channel is a first recessed channel and the medical device further comprises a second recessed channel formed in and extending longitudinally along the inside surface, wherein the first recessed channel is within the second recessed channel.

2 . The medical device of claim 1 , wherein:

the engagement feature on the lateral wall of the tube comprises a plurality of ratchet teeth; and

the repositionable anchor comprises one or more ratchet pawls configured to engage the plurality of ratchet teeth.

3 . The medical device of claim 2 , wherein:

in the first configuration of the medical device, the one or more ratchet pawls are engaged with at least one of the plurality of ratchet teeth; and

in the second configuration of the medical device, the one or more ratchet pawls are disengaged from the plurality of ratchet teeth.

4 . The medical device of claim 3 , wherein:

the repositionable anchor comprises one or more release portions and one or more resilient portions;

the one or more release portions are coupled to the one or more ratchet pawls by the one or more resilient portions; and

in response to a force applied to the one or more release portions, the one or more resilient portions are deformable to move the one or more ratchet pawls from the first configuration to the second configuration of the medical device.

5 . The medical device of claim 4 , wherein the repositionable anchor comprises two release portions positioned diametrically opposite one another across the tube.

6 . The medical device of claim 4 , wherein the one or more release portions are configured to be manipulated by a user of the device to move the one or more ratchet pawls from the first configuration to the second configuration.

7 . The medical device of claim 3 , wherein:

in the first configuration of the medical device, the repositionable anchor is free to translate in a distal direction and a proximal direction along the tube; and

in the second configuration of the medical device, the repositionable anchor is free to translate in the distal direction and prevented from translating in the proximal direction by engagement between the engagement feature on the lateral wall of the tube and the repositionable anchor.

8 . The medical device of claim 1 , wherein:

the engagement feature on the lateral wall of the tube comprise external tapered teeth extending around a portion of the tube in a circumferential direction;

the repositionable anchor further comprises:

an internal bore; and

internal tapered teeth on a sidewall of the bore.

9 . The medical device of claim 8 , wherein:

in the first configuration of the medical device, the internal tapered teeth are disengaged from the external tapered teeth; and

in the second configuration of the medical device, the internal tapered teeth are engaged with the external tapered teeth.

10 . The medical device of claim 9 , wherein the repositionable anchor is transitionable from the first to the second configuration of the medical device by rotating the repositionable anchor.

11 . The medical device of claim 1 , wherein the repositionable anchor comprises:

a first collar; and

a second collar rotatably coupled to the first collar.

12 . The medical device of claim 11 , wherein:

the first collar comprises a first bore through which the tube passes;

the second collar comprises a second bore through which the tube passes; and

the second bore comprises a longitudinal centerline offset from a center of rotation of the second collar.

13 . The medical device of claim 12 , wherein:

in the first configuration of the medical device, the longitudinal centerline of the second bore is coaxial with a longitudinal centerline of the tube; and

in the second configuration of the medical device, the longitudinal centerline of the second bore is offset from the longitudinal centerline of the tube.

14 . The medical device of claim 13 , wherein in the second configuration of the medical device, mechanical interference between the first collar, the second collar, and the tube prevents the repositionable anchor from translating relative to the tube.

15 . The medical device of claim 12 , wherein:

the engagement feature of the tube comprise ribs extending longitudinally along a length of the tube;

the first collar comprises notches within the first bore configured to receive the longitudinal ribs; and

engagement between the notches and longitudinal ribs prevent the first collar from rotating relative to the tube.

16 . The medical device of claim 1 , further comprising a cover covering the side of the recessed channel open to the hollow interior.

17 . The medical device of claim 16 , wherein the fluid passage is defined by the cover and the inside surface of the lateral wall in which the recessed channel is formed.

18 . The medical device of claim 1 , wherein a depth of the first recessed channel and the second recessed channel is defined along a radial dimension of the tube, and wherein the depth of the first recessed channel is larger than a depth of the second recessed channel.

19 . The medical device of claim 18 , further comprising a cover attached to the lateral wall of the tube, wherein the cover spans the second recessed channel and covers the first recessed channel.

20 . The medical device of claim 1 , further comprising the conduit member fit within the recessed channel, wherein the conduit defines the fluid passage.