US-12616498-B2 - Guide device for cannulas for the collection of micro-fragmented subcutaneous adipose tissue

US12616498B2US 12616498 B2US12616498 B2US 12616498B2US-12616498-B2

Abstract

A guide device for cannulas for the collection of micro-fragmented subcutaneous adipose tissue includes a handle which has an axial cavity intended to house a syringe equipped with a collection cannula. The axial cavity has an open proximal end, an open distal end and a central axis. A lip protrudes cantilevered from the distal end at a distance from the central axis and from said cannula. An intermediate anti-flexion element of the cannula is arranged between the handle and the lip.

Inventors

Alessandro Gennai

Assignees

SEFFILINE S.R.L.

Dates

Publication Date: 20260505
Application Date: 20201214
Priority Date: 20200123

Claims (10)

1 . A guide device for a collection cannula for the collection of micro-fragmented subcutaneous adipose tissue, said guide device comprising: a handle which has an axial cavity configured to house a syringe equipped with the collection cannula, said axial cavity having an open proximal end, an open distal end and a central axis; a lip which protrudes cantilevered from said open distal end parallel to the collection cannula at a distance from said central axis and from said collection cannula; wherein the collection cannula extends by a predetermined length with respect to the end of the lip of the guide device, wherein an intermediate anti-flexion element for said collection cannula is arranged between said handle and said lip and wherein said intermediate anti-flexion element comprises a tooth which projects transversely from said lip toward said central axis and which has a through hole intended for the passage of at least a section of the collection cannula.
2 . The device according to claim 1 , wherein said tooth comprises a connection segment with said handle.
3 . The device according to claim 1 , further comprising at least one inspection window obtained in said handle.
4 . The device according to claim 1 , wherein said handle comprises a partially or totally transparent handle.
5 . The device according to claim 1 , wherein said axial cavity is a cylindrical cavity wherein the syringe equipped with the collection cannula can be precisely housed.
6 . The device according to claim 1 , wherein said handle comprises retention means of the syringe equipped with the collection cannula in said axial cavity.
7 . The device according to claim 6 , wherein said retention means comprise an interlocking profile obtained in said open proximal end and configured to be engaged with a peripheral portion of the syringe.
8 . The device according to claim 1 , wherein said lip has a length lower than a length of the collection cannula.
9 . The device according to claim 1 , wherein said lip has a free distal end curved in opposite direction with respect to said central axis.
10 . The device according to claim 9 , wherein said lip has a reference point obtained at a selected distance from said free distal end.

Description

FIELD OF THE INVENTION The invention concerns a guide device for cannulas for the collection of micro fragmented subcutaneous adipose tissue, generally usable in the medical field to facilitate the maneuvers of physicians during the removal of adipose tissue from a patient. BACKGROUND OF THE INVENTION It is known that in some indications it is necessary to remove pre-determined volumes of adipose tissue from a patient. In particular, adipose tissue can be removed both to exploit the properties of stromal vascular cells (SVF) and mesenchymal stem cells (ADSCs) naturally present in it, and also to perform liposuction operations. According to the state of the art, in order to remove the adipose tissue, the physician uses a substantially rigid and beveled cannula which he/she introduces under the patient's skin in the removal zone after making a small incision. The cannula is equipped with surface holes that communicate with an axial conduit and is grafted onto a syringe with which the physician, after having positioned it in the removal point, sucks out the established quantity of adipose tissue. Typically, the positioning of the cannula is entrusted solely to the experience of the physician who has to introduce it under the skin in two steps, precisely an initial step in which, after making a small incision in the patient's epidermis, it passes through the skin in a substantially perpendicular direction, and a second step in which the physician rotates the cannula to arrange it substantially parallel to the surface of the skin and at such a depth as to meet the adipose tissue. Both steps, of penetration and rotation, are fundamental for the safety of the patient and the effectiveness of the technique. After introduction and positioning, the physician repeatedly performs some alternating movements, back and forth and fan-wise, and sucks out the adipose tissue with the syringe. The cannula penetration step, as previously mentioned, is therefore extremely important, both to safeguard the patient's safety, avoiding plunging the cannula beyond the adipose tissue and risking damage to vital tissues and organs, and also to position the cannula at the right depth to then perform the rotation step and position the cannula parallel to the skin. The correct depth is therefore the fundamental premise for the second, rotation step, in order to be able to perform the removal movements with maximum safety and with the certainty of reaching the adipose tissue which is the target of the removal. To facilitate these two operating steps of the physician, the present Applicant has perfected a guide device that can be used to carry out a correct introduction and correct positioning of the cannula under the patient's skin. The device consists of a handpiece that comprises a cylindrical body inside which a syringe can be housed on which a removal cannula is grafted. A lip protrudes cantilevered from the cylindrical body which, in the operating step, is substantially parallel to the cannula, but kept at a predetermined distance from it. Furthermore, the cannula extends by a predetermined length with respect to the end of the lip of the guide. The distance between the cannula and the lip is substantially equal to the depth at which the subcutaneous adipose tissue has to be suctioned, while the length of the cannula that extends beyond the lip is the predetermined depth that has to be reached during the introduction of the cannula in order to prevent injury to tissues or deep vital organs. In the introduction step, perpendicular to the skin, the lip of the guide acts as a stop to the excessive penetration of the cannula, while in the rotation step the lip is intended to rest externally on the skin and, during the forward and backward movement, it slides on it, maintaining the depth of the cannula under the skin constant. The state of the art has a disadvantage which is that the cannula is supported completely cantilevered from the syringe and, therefore, also from the handpiece. This circumstance, both during the introduction of the cannula under the patient's skin, and also during its movement in the steps of removing adipose tissue, causes flexion movements of the cannula with respect to the syringe and the handpiece held by the physician, and these flexions can make the positioning of the cannula inaccurate, generating the risk of not reaching the removal zone with precision or, even worse, of injuring the patient's internal organs not involved in the removal. In fact, the movement required for aspiration is both a “back and forth” and “fan-wise” movement. The flexion of the cannula with respect to the attachment on the syringe can make the procedure extremely inaccurate and dangerous because, due to the flexion with respect to the attachment of the syringe, the cannula deviates from its axis which is no longer parallel to the external lip of the guide and this deviation can cause an error on the part of the operator who follows th