Needle stabilizer for a minimally invasive medical intervention
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- QUANTUM SURGICAL
- Filing Date
- 2024-11-13
- Publication Date
- 2026-06-24
AI Technical Summary
Existing needle stabilizers for minimally invasive medical procedures are often complex, expensive, and fail to provide stable needle positioning across various angles and lengths, leading to potential needle displacement during medical interventions.
A compact, low-cost needle stabilizer with an elongated base and a connecting rod forming an elevation angle, featuring a stabilizing element with V-shaped notches to securely hold needles at different inclinations without modifying the stabilizer's shape.
The proposed needle stabilizer effectively stabilizes needles across various angles and lengths, ensuring precise positioning and reducing the risk of needle displacement during minimally invasive procedures, while being easy to produce and cost-effective.
Smart Images
Figure EP2024082264_30052025_PF_FP_ABST
Abstract
Description
[0001] Needle stabilizer for minimally invasive medical intervention
[0002] Field of invention
[0003] The methods and devices disclosed in the present application belong to the field of minimally invasive medical procedures. In particular, the invention relates to a needle stabilizer for use during a minimally invasive medical procedure to stabilize a needle inserted into a patient's body.
[0004] State of the art
[0005] Minimally invasive medical procedures may require a practitioner to insert one or more needles into a patient's body to a certain depth to reach a target anatomical area, such as the liver, lung, kidney, or bone. Examples of procedures include tumor removal using radiofrequency, microwave, electroporation, laser, or cryotherapy.
[0006] The needle is typically inserted through the patient's skin using a guide. The guide may be attached to the end of a robotic arm. The robotic arm may be guided by an optical navigation system. Patent application WO 2022 / 195210 describes an example of a medical robot for assisting a practitioner during a minimally invasive medical procedure.
[0007] To check the needle position, or to perform the procedure, it is usually necessary to release the needle from its guide. However, the needle must be held in the desired position. The needle can then be held by the practitioner, but this is relatively impractical and can lead to unwanted radiation of the practitioner in the event of X-ray medical image acquisition. The needle can also be held by compresses or adhesives, but the stability of the needle is then compromised. Due to the weight of the needle and the forces exerted by the cable(s) that supply it, the needle may move and no longer be exactly in the desired position.
[0008] There are more or less expensive and more or less complex needle stabilizers, with articulated elements, possibly motorized, to maintain a needle in the desired position (see for example patent US 9877787 B2, patent application EP 4029462 A1, or patent application WO 2021 168428 A1).
[0009] There is still a need for a needle stabilizer that is easy to produce, inexpensive, space-saving, and can stabilize a needle already inserted into the patient's body, regardless of the angle of needle insertion and the length of the portion of the needle located outside the patient.
[0010] Statement of the invention
[0011] The methods and devices disclosed in the present application aim to remedy all or part of the drawbacks of the prior art.
[0012] For this purpose, and according to a first aspect, there is proposed in particular a needle stabilizer intended to be used during a minimally invasive medical intervention to stabilize a needle inserted into the body of a patient. The needle stabilizer comprises:
[0013] - a base taking an elongated shape along a longitudinal axis, the base comprising a lower face intended to be placed on the patient's skin, and an upper face opposite the lower face,
[0014] - a connecting rod rising from the upper face of the base along a main axis belonging to a longitudinal plane of the base, the longitudinal axis of the base and the main axis of the connecting rod forming an elevation angle,
[0015] - a stabilizing element connected to a distal end of the connecting rod and comprising at least one V-shaped notch adapted to receive the needle in the hollow of the V in order to stabilize the needle according to different possible inclinations without it being necessary to modify the shape of the needle stabilizer.
[0016] In particular embodiments, the invention may further comprise one or more of the following features, taken individually or in any technically possible combination.
[0017] In particular embodiments, the stabilizing element comprises two V-shaped notches facing each other.
[0018] Each notch can then be used respectively to hold or support a needle partially inserted into the patient's body.
[0019] In particular embodiments, the base comprises a rear portion formed by a flexible tongue and a front portion opposite the rear portion in the direction of the longitudinal axis, the front portion being substantially located directly above the stabilizing element.
[0020] Having a tab at the rear that is more flexible than the front allows for adapting to the patient's body shape while ensuring good overall stability for the needle stabilizer. In particular embodiments, the base terminates at the front with two arms forming an opening directly above the stabilizing element. This opening is adapted to provide access to a needle insertion area at the patient's skin.
[0021] These two arms form a front base which has the advantage of improving the lateral stability of the needle stabilizer.
[0022] In particular embodiments, the connecting rod comprises a reinforcing element extending parallel to the longitudinal plane of the base.
[0023] The reinforcing element advantageously improves the rigidity of the connecting rod and thus limits its deflection under the weight of the needle.
[0024] In particular embodiments, the base comprises a rear base having an elongated shape extending in a direction perpendicular to the longitudinal axis.
[0025] The rear base also improves the lateral stability of the needle stabilizer.
[0026] In particular embodiments, the needle stabilizer is made of a single material.
[0027] In particular embodiments, the material is a polyamide or a polyetheretherketone.
[0028] In particular embodiments, the needle stabilizer is fabricated as a single piece.
[0029] In particular embodiments, the needle stabilizer is manufactured as an assembly of a first part forming the base with a second part comprising the connecting rod and the stabilizing element.
[0030] In particular embodiments, at least a portion of the underside of the base comprises an adhesive.
[0031] In particular embodiments, the elevation angle is between fifteen and eighty degrees of angle, or even between fifteen and sixty degrees of angle.
[0032] In particular embodiments, the height of the stabilizing element relative to the lower face of the base is between five and eighty millimeters.
[0033] In particular embodiments, the needle stabilizer has a dimension in a direction perpendicular to the longitudinal plane less than or equal to sixty millimeters, and preferably less than thirty millimeters.
[0034] This limited size of the needle stabilizer makes it easier to use several needle stabilizers when the medical procedure requires the insertion of several needles.
[0035] In particular embodiments, said at least one V-shaped notch is adapted to receive a needle whose diameter is between 8 Gauges and 21 Gauges.
[0036] Presentation of figures
[0037] The invention will be better understood on reading the following description, given by way of non-limiting example, and made with reference to figures 1 to 10 which represent:
[0038] [Fig. 1] a representation of a first example of embodiment of a needle stabilizer according to the invention,
[0039] [Fig. 2] a side view of the first embodiment of the needle stabilizer illustrated in Figure 1,
[0040] [Fig. 3] An illustration of one use of the needle stabilizer of Figure 1 to "hold" a needle,
[0041] [Fig. 4] An illustration of one use of the needle stabilizer of Figure 1 to "support" a needle,
[0042] [Fig. 5] a representation of a second exemplary embodiment of a needle stabilizer according to the invention,
[0043] [Fig. 6] a representation of a third exemplary embodiment of a needle stabilizer according to the invention,
[0044] [Fig. 7] a representation of a fourth exemplary embodiment of a needle stabilizer according to the invention,
[0045] [Fig. 8] a representation of a first part forming a base for a fifth exemplary embodiment of a needle stabilizer according to the invention,
[0046] [Fig. 9] a representation of a second part comprising a connecting rod and a stabilizing element for the fifth exemplary embodiment of a needle stabilizer according to the invention,
[0047] [Fig. 10] a representation of the fifth example of embodiment of a needle stabilizer according to the invention, corresponding to the assembly of the first part and the second part represented respectively in figures 8 and 9.
[0048] In these figures, identical references from one figure to another designate identical or similar elements. For reasons of clarity, the elements represented are not necessarily on the same scale, unless otherwise indicated. Detailed description of the invention
[0049] Figure 1 represents a first example of embodiment of a needle stabilizer 10 according to the invention.
[0050] Figures 3 and 4 illustrate how the needle stabilizer 10 may be used to stabilize a needle 50 inserted into a patient's body 60 during a minimally invasive medical procedure.
[0051] As illustrated in Figure 1, the needle stabilizer 10 includes a base
[0052] 20 taking an elongated shape along a longitudinal axis. The base has a rear part 20a and a front part 20b opposite each other in the direction of the longitudinal axis. The base 20 has a lower face 22 intended to be placed on the patient's skin, and an upper face 23 opposite the lower face 22.
[0053] The rear portion 20a of the base 20 may in particular be formed by a flexible tab 21. The term “flexible” is used here to mean that the tab
[0054] 21 is more flexible than the front portion 20b of the base. The flexibility of the tab 21 allows it to adapt to the shape of the patient's body 60. The rigidity of the front portion 20b of the needle stabilizer 10 gives it better grip, and therefore better performance in terms of stability of the needle 60.
[0055] However, nothing would prevent the use of a tab 21 which has the same rigidity as the front part 20b of the base 20.
[0056] At least a portion of the underside 22 of the rear portion 20a of the base 20 of the needle stabilizer 10 may be provided with an adhesive, for example a double-sided adhesive, for securing the needle stabilizer 10 to the patient's skin.
[0057] In a variant, it is also possible to place an adhesive over the rear portion 20a of the base 20 (for example, straddling the tab 21), to fix the needle stabilizer 10 to the patient's skin. In this case, the base 20 may advantageously include a mark 28 indicating where the adhesive should be positioned. The mark 28 may, for example, correspond to a location corresponding to the end of the flexible tab 21 going towards the front portion 20b of the base 20 (location where the base 20 becomes thicker).
[0058] The base also comprises an attachment zone 26, from which a connecting rod 30 rises from the upper face 23 of the base 20. Preferably, to ensure good stability of the device, the distance between the rear end of the base 20 and the attachment zone 26 is greater than the distance between the front end of the base 20 and the attachment zone 26. Preferably, the connecting rod 30 is fixed relative to the base 20; in particular, the inclination of the connecting rod relative to the base cannot be modified, either longitudinally (elevation angle) or laterally relative to the base.
[0059] As illustrated in Figure 2, the connecting rod 30 rises from the base 20 along a main axis BB' belonging to a longitudinal plane of the base 20. The longitudinal plane (equivalent to a sagittal plane) corresponds to the plane which includes the longitudinal axis AA' of the base 20 and which is perpendicular to the faces 22 and 23 of the base 20 (the longitudinal plane corresponds to the plane containing Figure 2). The longitudinal axis AA' of the base 20 and the main axis BB' of the connecting rod 30 then form an elevation angle 0. This is the elevation angle of the stabilizing element 40, relative to the base 20, formed at the attachment zone 26 of the connecting rod on the base 20. This angle takes for example a value between fifteen and eighty degrees of angle, or even between fifteen and sixty degrees of angle.
[0060] The connecting rod 30 comprises, at a distal end, a stabilizing element 40. The front part 20b of the base 20 is substantially located directly above the stabilizing element 40. As illustrated in Figures 3 and 4, the role of the stabilizing element 40 is to retain (position illustrated in Figure 3) or support (position illustrated in Figure 4) the needle 50 when the latter is partially or entirely inserted into the body 60 of the patient and is no longer retained by a guide used for inserting the needle. This may in particular be a guide fixed to the end of a robotic arm controlled using an optical navigation system, as is for example described in patent application WO2022 / 195210A1. However, nothing would prevent the needle stabilizer 10 according to the invention from being used for a minimally invasive medical procedure that is not assisted by a medical robot.In this case the needle can be inserted completely manually by a practitioner before the needle stabilizer 10 is used.
[0061] To support or retain the needle 50, the stabilizing element 40 comprises at least one V-shaped notch 41 or 42 adapted to receive the needle 50 in the hollow of the V in order to stabilize the needle 50.
[0062] As illustrated in Figure 1, each notch 41 or 42 is positioned such that the tip of the V belongs to the longitudinal plane, and the branches of the V belong to a plane parallel to the faces 22 and 23 of the base 20. Thus, when the needle 50 is supported or retained by the needle stabilizer 10, the needle 50 is located substantially in the longitudinal plane.
[0063] When the stabilizing element 40 comprises two notches 41 and 42, as illustrated in FIG. 1, the stabilizing element 40 may take the form of a C-shaped hook, each notch 41 or 42 then being at one end of the hook. The notches 41 and 42 are then opposite each other (the widest part of each notch is opposite the widest part of the other notch). The C-shaped hook is arranged parallel to the faces 22 and 23 of the base 20.
[0064] As illustrated in Figure 3, the needle stabilizer 10 can be used to retain the needle 50 in the notch 42 whose tip of the V is directed forward (i.e., in the direction of the longitudinal axis AA' which goes from the rear portion 20a to the front portion 20b of the base 20).
[0065] As illustrated in Figure 4, the needle stabilizer 10 can be used to support the needle 50 in the notch 41 whose tip of the V is directed rearwardly (i.e. in the direction of the longitudinal axis AA' which goes from the rear portion 20a to the front portion 20b of the base 20).
[0066] As illustrated in Figures 1, 3 and 4, the stabilizing element 40 has an opening 43 allowing a longitudinal portion of the needle 50 to pass through it in order to position it in the hollow of the V. When the stabilizing element 40 takes the form of a C-shaped hook, the opening 43 corresponds to the opening of the C.
[0067] The opening 43 also allows the needle stabilizer 10 to be removed from the patient's body without the need to remove the needle from the patient's body. For this purpose, the opening 43 has a dimension at least equal to the diameter of the needle 50.
[0068] To accommodate the needle 50, the widest part of the notch 41 or 42 also has a dimension at least equal to the diameter of the needle. Advantageously, the opening 43 or the widest part of the notch 41 or 42 has a dimension at least equal to three millimeters, or even at least equal to four millimeters. A dimension of at least 4.5 mm advantageously allows a needle with a diameter of eight gauges (8G) to be accommodated. For example, a dimension suitable for receiving needles 50 with a diameter between 8 gauges and 21 gauges (from 8G to 21 G) can be provided. Gauge is a unit of measurement commonly used to define the external diameter of a medical instrument such as a needle; 8G corresponds to 4.191 mm; 21 G corresponds to 0.812 mm. The higher the gauge number, the smaller the diameter of the needle.
[0069] The choice of a V shape for notches 41 and 42 makes it possible to support several needle diameters while ensuring good stability of the needle when it is in the hollow of the V, in simultaneous contact with the two branches of the V.
[0070] The stabilizing element 40 may also comprise only one notch 41 or 42. In this case, the needle stabilizer 10 is used exclusively in the support position or in the position for retaining the needle 50.
[0071] Advantageously, the needle stabilizer 10 according to the invention is suitable for stabilizing a needle 50 for different inclinations of the needle, without it being necessary to modify the shape of the needle stabilizer 10 (even if only one notch is used: it is the shape and arrangement of the notch which makes it possible to support different possible inclinations of the needle without it being necessary to modify the shape of the device). In particular, the needle stabilizer 10 according to the invention does not comprise an articulated element to adapt to the inclination of the needle.
[0072] The role of the connecting rod 30 is to move the stabilizing element 40 away in height from the base 20. As illustrated in FIG. 2, the stabilizing element 40 is located at a height H from the lower face 22 of the base 20. Different versions of the needle stabilizer 10 may have different heights H for the stabilizing element 40.
[0073] The higher the height H of the stabilizing element 40, the more effective the stabilization of the needle. However, the height H of the stabilizing element 40 must be adapted to the needs of the intervention, and in particular to the distance between the proximal end of the needle and the surface of the skin. For example, the height H of the stabilizing element 40 may be at least ten millimeters, or even at least twenty millimeters, or even at least forty millimeters. More generally, the height H of the stabilizing element 40 relative to the lower face 22 of the base 20 may be between five and sixty millimeters, or even between five and eighty millimeters.
[0074] In the embodiment described in Figure 1, the base 20 of the needle stabilizer 10 ends at its front portion 20b with two arms 24 forming an opening 25 directly above the stabilizing element 40. In the example illustrated in Figure 1, the two arms 24 extend parallel to the longitudinal axis AA', and symmetrically with respect to the longitudinal axis AA'. The opening 25 is adapted to provide access to an insertion zone of the needle 50 at the level of the patient's skin. This configuration of the needle stabilizer 10 with an opening 25 directly above the stabilizing element 40 is particularly advantageous for maintaining the needle in the retaining position (as illustrated in Figure 3), in particular when the inclination of the needle is significant.
[0075] If one seeks to favor a support position (as illustrated in Figure 4), then it is not essential to have this opening 25 at the front of the base 20 of the stabilizer 10.
[0076] The two arms 24 form a front base. This front base also has the advantage of improving the lateral stability of the needle stabilizer 10.
[0077] Figure 5 represents a second exemplary embodiment of a needle stabilizer 10 according to the invention.
[0078] In this second embodiment, the connecting rod 30 comprises a reinforcing element 31 extending parallel to the longitudinal plane of the base 20. In the example illustrated in FIG. 5, the reinforcing element 31 takes the form of a rib centered under a lower face of the connecting rod 30. However, other shapes could also be imagined for the reinforcing element 31. Nothing would prevent, for example, having a reinforcing element 31 formed by two parallel ribs under the lower face of the connecting rod 30. According to another example, in a variant where the base 20 does not include an opening 25 at its front part 20b, it is possible to use a reinforcing element 31 taking a triangular shape gradually widening from the distal end of the connecting rod 30 to the base 20.
[0079] The reinforcing element 31 advantageously makes it possible to improve the rigidity of the connecting rod 30 and thus to limit its deflection under the weight of the needle 50.
[0080] Figure 6 represents a third example of embodiment of a needle stabilizer 10 according to the invention.
[0081] In this third embodiment, the base 20 comprises a rear base 27 having an elongated shape extending in a direction perpendicular to the longitudinal axis (AA'). The rear base 27 is located between the rear end of the base 20 and the attachment zone 26 of the connecting rod 30 on the base 20.
[0082] The rear base 27 advantageously makes it possible to improve the lateral stability of the needle stabilizer 10.
[0083] The third embodiment illustrated in Figure 6 does not include a reinforcing element 31 at the level of the connecting rod 30.
[0084] Figure 7 represents a fourth exemplary embodiment of a needle stabilizer 10 according to the invention, comprising both a rear base 27 and a reinforcing element 31. In this fourth exemplary embodiment, the height of the stabilizing element 40 is greater than in the other exemplary embodiments described respectively with reference to Figures 1, 5 and 6. A high height of the stabilizing element 40 relative to the base 20 may justify the need to have a rear base 27 to have good stability.
[0085] Regardless of the embodiment considered, the needle stabilizer 10 may be manufactured with a single material. For example, the needle stabilizer 10 may in particular be made of polyamide (for example PA2200) or polyetheretherketone (commonly designated by the acronym PEEK which corresponds to the first letters of the English word “PolyEtherEtherKetone”).
[0086] Advantageously, to simplify manufacturing and reduce the cost thereof, the needle stabilizer 10 can be manufactured as a single piece. In particular, the needle stabilizer 10 can be produced using an additive manufacturing method, i.e. by 3D printing (three-dimensional printing).
[0087] However, nothing would prevent, in variants, the use of at least two different materials (for example a rubber part for the tab 21 or for the entire base 20, and a stainless steel part for the connecting rod 30 and the stabilizing element 40).
[0088] Figures 8 to 10 correspond to a fifth example of embodiment of a needle stabilizer 10 according to the invention, manufactured in the form of an assembly of a first part forming the base 20 with a second part comprising the connecting rod 30 and the stabilizing element 40.
[0089] Figure 8 is a representation of the first part forming the base 20. In the example considered, the base 20 comprises a rear base 27 and a front base formed by two arms 24. These elements however remain optional, as indicated previously.
[0090] Figure 9 is a representation of the second part comprising a connecting rod 30 and a stabilizing element 40. The different variants previously described for the connecting rod 30 and the stabilizing element 40 are also valid for this fifth embodiment (possibility of having a reinforcing element, presence of one or more V-shaped notches, etc.).
[0091] In the example illustrated in Figures 8 and 9, the first part comprises a mortise 29a intended to cooperate with a tenon 29b of the second part to assemble the first part with the second part. The mortise 29a and the tenon 29b correspond to means of assembling the first part with the second part. Other assembly means could however be envisaged.
[0092] Figure 10 shows the assembly of the first part and the second part shown respectively in Figures 8 and 9.
[0093] Advantageously, the first part illustrated in Figure 8 can be assembled with different versions of the second part illustrated in Figure 9, each version being able to correspond to a different height H of the stabilizing element 40.
[0094] The following passage provides some examples of dimensions for the needle stabilizer 10 (these examples are in no way limiting and can be applied to the various embodiments described above):
[0095] - the tab 21 has, for example, a width of between 8 mm and 30 mm, and a length of between 50 mm and 100 mm;
[0096] - the front base (formed by the two arms 24) has, for example, a width of between 12 mm and 25 mm and a length of between 12 mm and 60 mm;
[0097] - the rear base 27 has, for example, a width of between 12 mm and 25 mm and a length of between 12 mm and 60 mm;
[0098] - the tab 21 has, for example, a thickness of between 0.3 mm and 1.5 mm;
[0099] - the connecting rod 30 has, for example, a thickness of between 2 mm and 6 mm.
[0100] It is advantageous to provide a needle stabilizer 10 having a small footprint in a direction perpendicular to the longitudinal plane. This makes it possible to place several needle stabilizers side by side for multi-needle interventions. For example, the dimension of the needle stabilizer 10 in a direction perpendicular to the longitudinal plane is less than or equal to 60 mm, and preferably less than 30 mm.
[0101] The following passage describes an example of use of the needle stabilizer according to the invention during a percutaneous tumor ablation procedure in an anatomy of interest (for example the liver). For such a procedure, a practitioner may insert one or more needles into the patient's body. This insertion may be previously planned on a medical image of the anatomy of interest, for example an image obtained by computed tomography (CT scan in English, CT is the acronym for "Computerized Tomography"), by positron emission tomography (PET scan in English, PET is the acronym for "Positron Emission Tomography"), by magnetic resonance imaging (MRI), by ultrasound, or by X-rays). The insertion of the needle (or needles) may be done manually by the practitioner.It can also be assisted by a navigation system (e.g. an optical or electromagnetic navigation system) and / or by a robotic device.
[0102] When the needle is inserted into the patient's body and its distal end is in the area to be ablated, the practitioner and / or the robotic device releases the needle. To prevent unwanted needle displacement (as a result of which the needle could be deflected from its target), the practitioner positions the needle stabilizer to support or hold the needle.
[0103] When the available space around the needle is highly congested (e.g., when several needles need to be inserted) or when the needle is tilted too far from the skin, the needle stabilizer can be advantageously positioned to retain the needle (retained position shown in Figure 3). The practitioner can then start the ablation procedure (e.g., radiofrequency, microwave, electroporation, laser, cryotherapy) or position other needles. The procedure can be performed with the stabilizer in place.
[0104] Advantageously, the stabilizer may be positioned after the needle has been at least partially inserted into the patient's body, and the stabilizer may be removed prior to removing the needle from the patient's body.
Claims
Claims 1. A needle stabilizer (10) for use during a minimally invasive medical procedure to stabilize a needle (50) inserted into a patient's body (60), the needle stabilizer (10) comprising: a base (20) having an elongated shape along a longitudinal axis (AA'), the base (20) having a lower face (22) for placement on the patient's skin, and an upper face (23) opposite the lower face (22), a connecting rod (30) rising from the upper face (23) of the base (20) along a main axis (BB') belonging to a longitudinal plane of the base, the longitudinal axis (AA') of the base and the main axis (BB') of the connecting rod (30) forming an elevation angle (0), a stabilizing element (40) connected to a distal end of the connecting rod (30) and comprising at least one notch (41 ,42) V-shaped adapted to receive the needle (50) in the hollow of the V in order to stabilize the needle (50) according to different possible inclinations without it being necessary to modify the shape of the needle stabilizer (10)., 2. Needle stabilizer (10) according to claim 1 wherein the stabilizing element (40) comprises two V-shaped notches (41, 42) facing each other.
3. Needle stabilizer (10) according to any one of claims 1 to 2 wherein the base (20) comprises a rear part (20a) formed by a flexible tab (21) and a front part (20b) opposite the rear part (20a) in the direction of the longitudinal axis (AA'), the front part (20b) being substantially located directly above the stabilizing element (40).
4. Needle stabilizer (10) according to any one of claims 1 to 3 wherein the base (20) ends at the front part (20b) by two arms forming an opening (25) directly above the stabilizing element (40), said opening (25) being adapted to provide access to an insertion zone of the needle (50) at the level of the patient's skin.
5. Needle stabilizer (10) according to any one of claims 1 to 4 wherein the connecting rod (30) comprises a reinforcing element (31) extending parallel to the longitudinal plane of the base (20).
6. Needle stabilizer (10) according to any one of claims 1 to 5 wherein the base (20) comprises a rear base (27) having an elongated shape extending in a direction perpendicular to the longitudinal axis (AA').
7. Needle stabilizer (10) according to any one of claims 1 to 6, made from a single material.
8. A needle stabilizer (10) according to claim 7 wherein the material is a polyamide or a polyetheretherketone.
9. A needle stabilizer (10) according to any one of claims 1 to 8 manufactured as a single piece.
10. A needle stabilizer (10) according to any one of claims 1 to 8 manufactured as an assembly of a first part forming the base (20) with a second part comprising the connecting rod (30) and the stabilizing element (40).
11. A needle stabilizer (10) according to any one of claims 1 to 10 wherein at least a portion of the underside (22) of the base (20) comprises an adhesive.
12. Needle stabilizer (10) according to any one of claims 1 to 11 in which the elevation angle (0) is between fifteen and eighty degrees of angle, or even between fifteen and sixty degrees of angle.
13. A needle stabilizer (10) according to any one of claims 1 to 12 wherein the height of the stabilizing element (40) relative to the lower face (22) of the base (20) is between five and eighty millimeters.
14. A needle stabilizer (10) according to any one of claims 1 to 13 having a dimension in a direction perpendicular to the longitudinal plane less than or equal to sixty millimeters, and preferably less than thirty millimeters.
15. Needle stabilizer (10) according to any one of claims 1 to 14 wherein said at least one V-shaped notch (41, 42) is adapted to receive a needle (50) whose diameter is between 8 Gauges and 21 Gauges.