WO2017032912A1 - Needle for applying neuraxial anaesthesia - Google Patents

Abstract

The invention relates to a needle for applying neuraxial anaesthesia, where said needle can act as both a spinal needle and an epidural needle, comprising: a first handle (6) holding a first cannula (7), said first handle (6) being covered, on the free end thereof, by a mandrel (8), such that the first handle (6) comprises, in an upper central part, a semi-spherical magnifying glass (9) which amplifies the field of vision, allowing the detection of the outflow of cerebrospinal liquid at a higher resolution, and a rear part of the mandrel (8) has a rounded shape so as to allow a better fit in the hand, and a slight upward incline to allow the user to pick the needle (1) up from a working table with just one hand. The ergonomic structure allows the needle to be guided with absolute precision and orientation over the puncture zone of the patient. Fins can also be coupled to the needle so as to allow the use thereof as an epidural needle.

Description

 NEEDLE TO APPLY NEUROAXIAL ANESTHESIA DESCRIPTION OBJECT OF THE INVENTION

 The object of the present invention relates to a new needle for applying neuroaxial anesthesia, where said needle can act as both a spinal needle and an epidural needle. This new needle has a design that adapts perfectly to the shape of the hand allowing greater grip, greater comfort and ease of use. Its ergonomic structure allows the needle to be directed with absolute precision and orientation over the puncture area of the patient, where a hemispherical magnifying glass widens the field of vision, allowing the cerebrospinal fluid to be detected with a greater resolution, since it is necessary to detect its exit, This type of lumbar punctures. Additionally, fins can be attached to allow its use as an epidural needle. These fins are removable and fit with a simple movement.

Find special application in the field of medicine industry.

TECHNICAL PROBLEM TO BE RESOLVED AND BACKGROUND OF THE INVENTION

As it is known, people who use this type of needles are anesthetists and often, these people lose physical faculties (tired eyesight, slight eye conditions, lower pulse, less force, greater difficulty of grip, general fatigue, ...) due at age, therefore, this new needle has been devised that helps solve these problems, facilitating the work of the anesthetist, offering maximum ergonomics and thus improving the experience.

Each of the improvements that have been made according to the problem to be solved are specified below:

 - Tired view: a magnifying glass has been designed that improves the vision of the cerebrospinal fluid outlet and a tongue that defines the correct position of the needle, thus helping to increase the speed at the time of insertion.

 - Lower strength: ergonomic shape, facilitates the extraction and introduction of the needle.

 The design of an emptying in the handle allows greater control of the input speed.

- Bigger hands, greater grip difficulty, lower pulse: grip and larger mandrel, with a finger measure adapted to a larger percentile of people. The surface of the mandrel is rough and non-slip.

 General fatigue: the tongue indicates the numbering of the needle to be used, and the colors of the mandrel help to increase the speed of decision when choosing the size of the needle.

Therefore, the present invention comes to solve the aforementioned prior art problems. DESCRIPTION OF THE INVENTION

The present invention relates to a needle for applying neuroaxial anesthesia comprising a first handle that holds a first cannula, said first handle covered at its free end by a mandrel, such that the first handle comprises a hemispherical magnifying glass in the upper central part for detect the spinal fluid outlet, and the back of the mandrel has a rounded shape to better fit the hand and a slight upward tilt to be able to pick up the needle from a work table with one hand. The surface of the mandrel is rough and non-slip. The first handle comprises at the rear a coupler for attaching syringes; in the central upper part a recess for greater control and hold of the needle; in the upper front part a non-slip stop to control the force exerted on the needle and a front tip with a conical shape; in the lateral ones a slight curvature with continuous form for a greater adaptation to the fingers, and some reliefs to increase the friction and help to the extraction of the needle; and in the lower front part, grooves for attaching fins. A tongue incorporated in the mandrel defines the correct position of the needle and indicates the numbering of the needle to be used. The needle also comprises a first joint zone between the upper part of the first handle and the anti-slip stop, and a second connection zone between the anti-slip stop and the front tip, both joining zones with convex geometry. In a particular embodiment, the needle comprises an introducer needle comprising a second handle holding a second cannula, where the needle is configured to engage said introducer needle. This second handle of the introducer needle is identical to the first handle of the needle. Optionally, the introducer needle could incorporate a mandrel identical to the neuroaxial needle mandrel.

BRIEF DESCRIPTION OF THE FIGURES

 In order to complete the description and in order to help a better understanding of the features of the invention, this descriptive report is attached, as an integral part thereof, a set of drawings where, for illustrative and non-limiting purposes, it has been represented the next:

Figure 1.- Shows the new needle in perspective. When attaching the fins, it can also be used as an epidural needle.

 Figure 2.- Shows different views of the needle, bottom view, top view, section view according to the GG section and profile view. The design of the handle and mandrel can be observed in detail.

 Figure 3.- Shows the needle of the invention coupled to an introducer needle. It is observed how the first and second handles are equal.

Below is a list of the different elements represented in the figures that make up the invention:

 1. Needle to apply neuroaxial anesthesia.

 2. Introducer needle.

 3. Second grip.

 4. Second cannula.

 6. First grip.

 7. First cannula.

 8. Chuck.

 9. Magnifying glass

 10. Tongue.

 1 1. Fins.

 12. Front tip.

 13. Anti-slip stop.

 14. Emptying.

15. Slots. 16. Reliefs.

 17. Coupler.

 18. Mandrel hose.

 19. First junction zone.

 20. Second junction zone.

DETAILED DESCRIPTION

 This new needle (1) to apply neuroaxial anesthesia has been designed after an exhaustive study of the many inconveniences that arise with conventional needles. The study highlights the positions of the fingers used when using said needle (1).

The object of the invention is a needle (1) for applying neuroaxial anesthesia comprising:

 - a first handle (6) holding a first cannula (7), said first handle (6) covered at its free end by a mandrel (8),

characterized by

 - the first handle (6) comprises in the upper central part a hemispherical magnifying glass (9) to detect the spinal fluid leakage, since as is known, the cerebrospinal fluid is transparent and therefore very difficult to see, and

 - the back of the mandrel (8) has a rounded shape to better fit the hand and a slight upward tilt to facilitate the collection of the product from the worktable with one hand.

As can be seen in Figure 1, the first handle (6) additionally comprises:

 In the back:

 or a coupler (17) for coupling syringes with anesthetic medicine, - in the upper central part:

 or a recess (14) which, when inserting part of the thumb, offers greater control and support of the needle (1) at the time of insertion and removal, as well as when attaching the syringe,

 on the top front:

or a non-slip stop (13) to control the force exerted on the needle (1), and

 or a front tip (12) with a conical shape that allows better control of possible movements or oscillations of the needle (1) when inserting the syringe,

 - on the sides:

 or a slight curvature with continuous form for greater adaptation to the surface of the finger, and

 or some reliefs (16) to increase the friction and help the extraction of the needle (1),

 - at the lower front (at the opposite end of the non-skid stop (13)):

 or slots (15) for attaching fins (1 1), where said fins (1 1) allow the use of the needle (1) as an epidural needle. These fins (1 1) are removable and fit with a simple movement.

Figure 1 shows the needle (1) with and without fins (1 1). Generally, when the needle (1) is used without fins (11) it is being used as a spinal needle, while if the fins (11) are placed it is used as an epidural needle. Obviously, to insert an anesthetic medication through the syringe, the mandrel must first be removed (8).

The upper surface of the mandrel (8) is rough to facilitate its removal. The mandrel (8) also comprises a tongue (10) that indicates the correct position in which the needle (1) must be inserted and in turn, said tongue (10) indicates the numbering of the needle to be used since there are different sizes .

The different colors of the mandrel (8) facilitate the identification of the diameter of the needle that is needed at all times. The needles are in standardized colors that allow them to be quickly identified.

The first handle (6) and the mandrel (8) are larger than the existing models in the market, to adapt to the different types of hands. When placing the thumb on the emptying (14), resting in turn on the stop Anti-slip (13) and the index finger on the bottom of the first handle (6), greater control of the needle (1) is obtained. While at the time of extraction, the index and thumb fingers are preferably placed on the sides of the first handle (6), where the reliefs (16) of said sides increase friction and therefore help to extract the needle ( 1) more easily.

Both the area between the top of the first handle (6) and the anti-skid stop (13), called the first joining zone (19), and the area between the anti-skid stop (13) and the front tip (12) , called second junction zone (20), have convex geometry.

In a particular embodiment, the needle (1) of the present invention comprises an introducer needle (2) comprising a second handle (3) holding a second cannula (4), where the needle (1) is configured to engage said introducer needle (2).

It is known that when the needle (1) is used as a spinal needle, it is necessary to place the introducer needle (2), which is larger, to prevent cells from being dragged with the next needle puncture (1). skin inside the spinal cord.

This second handle (3) of the introducer needle (2) is identical to the first handle (6) of the needle (1), and therefore comprises the same elements, as shown in figure 3.0 optionally, the introducer needle (2) could incorporate a mandrel identical to the mandrel (8).

Figure 2 shows different views of the needle (1): bottom view, top view, section view according to the GG section and finally a profile view. Figure 3 shows how the front tip (12) with a conical shape of the needle (1) fits perfectly to the coupler (17) of the second handle (3) of the introducer needle (2) so that the first cannula (7) of the needle (1) is not airborne, making it easier to hold between both needles (1, 2). The present invention should not be limited to the embodiment described herein. Other configurations can be made by those skilled in the art in view of the present description. Accordingly, the scope of the invention is defined by the following claims.

Claims

1. Needle (1) to apply neuroaxial anesthesia comprising:  - a first handle (6) holding a first cannula (7), said first handle (6) covered at its free end by a mandrel (8), characterized by  - the first handle (6) comprises in a central upper part a hemispherical magnifying glass (9) to detect the spinal fluid leakage, and  - a rear part of the mandrel (8) has a rounded shape to better fit the hand and a slight upward tilt to be able to pick up the needle (1) from a work table with one hand. 2. Needle (1) for applying neuroaxial anesthesia according to claim 1, characterized in that the first handle (6) comprises in a rear part a coupler (17) for coupling syringes. 3. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the first handle (6) comprises in the upper central part a recess (14) for greater control and holding of the needle (1) . 4. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the first handle (6) comprises in a front upper part:  - a non-slip stop (13) to control a force exerted on the needle (1), and  - a front tip (12) with a conical shape. 5. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the first handle (6) comprises on one side:  - a slight curvature with continuous form for greater adaptation to fingers, and - reliefs (16) to increase friction and help with needle removal ( 6. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the first handle (6) comprises grooves (15) in a lower front part for coupling fins (1 1). 7. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that it comprises a first joint area (19) between an upper part of the first handle (6) and the geometry anti-slip stop (13) convex 8. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that it comprises a second junction zone (20) between the anti-slip stop (13) and the leading tip (12) of convex geometry. 9. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the mandrel (8) comprises a tongue (10) for defining a correct position of the needle and indicating a numbering of the needle to be used. 10. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that the surface of the mandrel (8) is rough and non-slip. 1 1. Needle (1) for applying neuroaxial anesthesia according to any one of the preceding claims, characterized in that it comprises an introducer needle (2) comprising a second handle (3) holding a second cannula (4), wherein the needle ( 1) is configured to engage said introducer needle (2). 12. Needle (1) for applying neuroaxial anesthesia according to claim 1, characterized in that the second handle (3) of the introducer needle (2) is equal to the first handle (6) of the needle (1). 13. Needle (1) for applying neuroaxial anesthesia according to claim 1, characterized in that the introducer needle (2) comprises a mandrel (8).