Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
  • A61M5/3286—Needle tip design, e.g. for improved penetration
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/178—Syringes
  • A61M5/31—Details
  • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/34—Trocars; Puncturing needles
  • A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/19—Constructional features of carpules, syringes or blisters
  • A61M2205/192—Avoiding coring, e.g. preventing formation of particles during puncture
  • A61M2205/195—Avoiding coring, e.g. preventing formation of particles during puncture by the needle tip shape

Definitions

• the present invention generally relates to a mgdical needle, and more particularly to a medical needle for performing stimulation therapy and/or injection therapy on a certain region or point which induces pain and disabilities by inserting the needle into the pain region or point.
• a needle includes a body 10, which is circular in cross-section and which has a tubular bore 11, terminating in a discharge end or outlet defined by the edges of the wall of the body 10.
• the body 10 is bent to provide a curved surface 15 of diminishing area, extending in the direction of the outer parts of the end portion of the needle.
• This curved surface 15 is interrupted by the edges, which, at their points of merger with the curved surface 15, provide cutting edges 17.
• beveled surfaces 18 extend at proper angles with respect to the curved surface 15. Accordingly, a slitting function is achieved as the needle is caused to pierce the tissue.
• a tissue-piercing point 16 is defined at the point of juncture of the surfaces 18 and 15.
• the needle when performing epidural anesthesia by using the medical needle of prior art, the needle should be inserted into an epidural space of a dura mater, which surrounds brain and spinal cord.
• a dura mater which surrounds brain and spinal cord.
• the sharp cutting edges and tissue- piercing point of the needle may damage the spinal cord and nerve roots surrounded by the dura mater, thereby causing serious problems such as physical paralysis and neuropathy.
• the medical needle of the prior art leaves many lacerations at the tissues since the sharp cutting edges split the tissues as it enters the patient's body.
• the present invention provides a medical needle comprising a main body having a proximal end and a distal end, wherein the main body extends along a longitudinal axis from the proximal end to the distal end; and wherein a tip portion is formed at the distal end of the main body.
• the tip portion has a first inclined region, the cross-sectional area of which decreases progressively toward the distal end and has a pair of surfaces inclined with a first inclination angle.
• the tip portion also has a second inclined region extending from the end of the first inclined region toward the distal end, while the cross-sectional area decreases progressively toward the distal end and has a pair of surfaces inclined with a second inclination angle. Further, a tip is formed at the point of juncture of the pair of surfaces of the second inclined region and has a predetermined radius of curvature.
• the main body is circular in cross-section. The diameter of the main body is 0.6mm to 1.2mm.
• the first inclination angle is 15° to 20° and the second inclination angle is 30° to 45°.
• the medical needle further comprises tapered portions, which are formed on parts of both sides of the first inclined region.
• Each tapered portion is inclined at a predetermined inclination angle with respect to the longitudinal axis, and curved portions are formed at the points of juncture of the tip and tapered portions, wherein the curved portions are rounded at a predetermined radius of curvature.
• the inclination angle of each tapered portion is 5° to 15°.
• a tubular bore for injection is formed through the main body and the tip portion along the longitudinal axis. The tip is located on the longitudinal axis, or is located apart from the longitudinal axis so that an opening of the tubular bore is located on one of the pair of surfaces of the first inclined region.
• a medical instrument of the present invention comprises a needle including a main body having a proximal end and a distal end.
• the main body extends along a longitudinal axis from the proximal end to the distal end, wherein a tip portion is formed at the distal end of the main body.
• the tip portion has a first inclined region, the cross-sectional area of which decreases progressively toward the distal end and has a pair of surfaces inclined with a first inclination angle.
• a second inclined region extends from the end of the first inclined region toward the distal end, while the cross-sectional area decreases progressively toward the distal end and has a pair of surfaces inclined with a second inclination angle.
• a tip is formed at the point of juncture of the pair of surfaces of the second inclined region and has a predetermined radius of curvature.
• the medical instmment of the present invention also comprises a moving unit including a griping part, an extending part extending from the griping part, and a supporting part provided at the end of the extending part and to which the proximal end of the main body of the needle is fixed. It further comprises a guiding unit including a hollow receiving part, into which the moving unit is inserted to be moved linearly, and a bending-prevention part extending from the end of the receiving part for guiding the movement of the needle. DESCRIPTION OF DRAWINGS Fig.
• FIG. 1 is a perspective view of a medical needle constructed in accordance with a first embodiment of the present invention.
• Fig. 2 is a side view of the medical needle shown in Fig. 1.
• Fig. 3 is a plan view of the medical needle shown in Fig. 1.
• Fig 4 is a perspective view of a medical instrument using the medical needle shown in Fig. 1.
• Fig. 5 is a side view of a medical needle constructed according to a second embodiment of the present invention.
• Fig. 6 is a plan view of the medical needle constructed according to the second embodiment of the present invention.
• Fig. 7 is a side view of a medical needle constructed in accordance with a third embodiment of the present invention.
• Fig. 8 is a plan view of the medical needle constructed according to the third embodiment of the present invention.
• Fig. 9 is a side view of a medical needle of the prior art.
• Fig. 10 is a plan view of the medical needle of the prior art.
• Fig. 1 is a perspective view of a medical needle constructed according to a first embodiment of the present invention.
• the medical needle 110 of the first embodiment of the present invention has a main body 120, which is circular in cross-section and extends to a predetermined length, wherein a tip portion 130 is formed at the front end portion of the body 120.
• the portion closest to the user (i.e., the surgeon) in each part of the medical needle 110 will be defined as the proximal end portion, while the portion farthest from the user in each part will be defined as the distal end portion.
• the tip portion 130 includes a first inclined region 132 and an integral second inclined region 134.
• the cross-sectional area of the first inclined region 132 decreases progressively from its proximal ends 136 on a circumference of the main body 120 to its distal ends 138.
• the first inclined region 132 includes an upper inclined surface 132a and a lower inclined surface 132b, which are bilaterally symmetric on a longitudinal axis X which passes through the center of the circular main body 120 (refer to Fig. 2).
• the diameter d of the main body 120 is approximately 0.6mm ⁇ 1.2mm, and the inclination angle ⁇ j made by the upper and lower inclined surfaces 132a and 132b of the first inclined region 132 is approximately 15° ⁇ 20°.
• the cross-sectional area of the second inclined region 134 decreases progressively from its proximal ends 138 to its distal end 140 and includes an upper inclined surface 134a and a lower inclined surface 134b, which are bilaterally symmetric on the longitudinal axis X of the main body 120 (refer to Fig. 2).
• the proximal ends 138 of the second inclined region 134 are the same points as the distal ends of the first inclined region 132.
• the distal end 140 of the second inclined region 134 is the tip, which is configured to permit piercing of the patient's skin.
• an inclination angle ⁇ 2 made by the upper and lower inclined surfaces 134a and 134b of the second inclined region 134 is approximately 30° ⁇ 45°.
• tapered portions 146 on parts of both sides of the first inclined region 132. Each tapered portion 146 is inclined at a predetermined angle ⁇ 3 with respect to the longitudinal axis X of the main body 120.
• the tip 140 is positioned on the longitudinal axis X (refer to Fig. 2) of the body 120 and has a prescribed radius of curvature.
• Curved portions 144 are formed at the points of juncture of the tip 140 and the tapered portions 146, which are rounded at a prescribed radius of curvature. It is desirable for the inclination angle ⁇ 3 of the tapered portion 146 to be approximately 5° ⁇ 15°.
• the side surfaces of the first inclined region 132 of the tip portion 130 are round, but the tip 140 is shaped flat and sharp due to the second inclined region 134. However, the tip 140 becomes rounder and blunter as it goes from its center to the curved portions 144. As explained above, since the center of the tip 140 is sharp but flat, it is used only to pierce through the patient's skin, and not to perforate the nerve or blood vessel. This minimizes the damage on the nerve or blood vessel.
• the needle which is constructed in accordance with the first embodiment of the present invention, is used for treating the following symptoms.
• the operational effects will also be explained below.
• the medical needle of the present invention is used for treating a nerve capture.
• the needle can be inserted in the soft tissue of fibrosis around the spine to stimulate the soft tissue and also to release the tangled tissue by rotating the needle.
• the medical needle of the present invention does not slit the tissue by its characteristics in shape, but rather pushes through the tissue (as explained above). This operational effect is very important for treating regions around the spine.
• the medical needle of the present invention is used for treating microadhesiolysis of muscles. Muscles with contraction knots are very hard and strained.
• the conventional medical needle with an acute tip (refer to Figs. 9 and 10) is unsafe when it is inserted in order to release contraction knots. More particularly, approaching the spinal tonic muscle, such as multifidus, is very precarious since the acute conventional needle can penetrate into the spine or injure the nerves of the spine.
• the medical needle of the present invention does not easily slit or pierce the nerve or blood vessel and makes the nerve or blood vessel escape by itself when contacting the needle due to the characteristics of its shape. Thus, it is possible to approach the spinal tonic muscle and effectively release the contraction knots.
• the medical needle of the present invention is used for treating tangles of fascia, ligament or tendon. For example, the collagen fiber that composes the tendon is folded, wrinkled or tangled on the insertion point where the tendon is attached to the bone. In such a region, the collagen fiber adheres to the surrounding soft tissue, h order to induce the reproduction of the collagen fiber, the adhesion to the surrounding soft tissue should be broken.
• Fig 4 is a perspective view of a medical instrument using the medical needle 110.
• the medical instrument 100 comprises the needle 110, a moving unit 102 for supporting the needle 110 for easy movement of the needle 110, and a guiding unit 106 for guiding the movement of the moving unit 102.
• the moving unit 102 includes a griping part 103, which is flat and rectangular in cross-section so that the user can hold it with the user's hands, an extending part 104, which extends from a side surface of the griping part 103, and a supporting part 105, which is provided at the end of the extending part 104 and to which the end of the body 120 of the needle opposite to the tip portion 130 is fixed.
• the guiding unit 106 includes a hollow cylinder-shaped receiving part 107, one end of which is opened for receiving the extending part 104 and the supporting part 105 of the moving unit 102, and a bending-prevention part 108, which extends longitudinally from the other end of the receiving part 107 and surrounds a part of the needle 110.
• the extending part 104 of the moving unit 102 is formed in a piston shape, which is inserted into the receiving part 107 of the guiding unit 106.
• the extending part 104 has ribs 104a, which protrude radially and extend longitudinally on the peripheral surface of the extending part 104.
• the height of the rib 104a is designed so that the top ends of the ribs 104a simultaneously contact the inner surface of the receiving part 107. Forming such ribs 104a on the peripheral surface of the extending part 104 is for accurately moving the moving unit 102 along the inner surface of the receiving part 107 and reducing the friction with the inner surface of the receiving part 107 for smoother linear movement of the moving unit 102.
• the supporting part 105 is circular in cross-section and is desirable to be slightly smaller than the inner diameter of the receiving part 107 of the guiding unit 106. This is so that the air can freely flow through a gap between the supporting part 105 and the receiving part 107 when the moving unit 102 reciprocates linearly in the receiving part 107.
• the supporting part 105 may be formed integrally at the end of the extending part 104, or detachably coupled to the end of the extending part 104.
• each independent supporting part 105 having a needle 110 can be replaced depending on each treatment situation in such a manner that the supporting part 105 is coupled detachably to the end of the common-used extending part 104 by means of screw-coupling, press-fitting or the like.
• the medical instrument 110 of the present invention could be produced with various materials having certain solidity and proven to be harmless to the human body.
• the needle 110 is made of stainless steel, and the moving unit 102 and the guiding unit 106 are made of synthetic resins.
• the user inserts the needle 110, the supporting part 105 and the extending part 104 of the moving unit 102 into the receiving part 107 of the guiding unit 106, and locates the bending-prevention part 108 of the receiving part 107 on the surface of the patient's body approximate to the region to be treated. If the user fixes the location of the receiving part 107 with one hand, and holds the griping part 103 of the moving unit 102 and pushes the moving unit 102 toward the patient's body with the other hand, the moving unit 102 moves linearly while the ribs 104a contact the inner surface of the receiving part 107.
• Fig. 5 and Fig. 6 are a side view and a plan view of a medical needle according to a second embodiment of the present invention, respectively.
• the medical needle according to the second embodiment of the present invention comprises a main body 220 and a tip portion 230 having first and second inclined regions 232 and 234, a tip 240, tapered portions 246 and curved portions 244, similar to the medical needle 110 of the first embodiment.
• the medical needle according to the second embodiment further comprises a tubular bore 248 for injection.
• the tubular bore 248 is formed through the main body 220 and the tip portion 230 along the longitudinal axis X.
• the medical needle of the second embodiment provides certain effects such as administering anesthesia or injection in a region to be treated in a human body or sampling of cerebrospinal fluid.
• the flat and rounded tip 240 and curved portions 244 have little possibility of penetrating the dura mater, thus preventing severe headache which may be caused by penetrating the dura mater.
• the medical needle according to the third embodiment has a main body 320, which is circular in cross-section and extends to a predetermined length. It also has a tip portion 330, which is formed at the front end portion of the main body 320.
• the tip portion 330 includes a first inclined region 332 and an integral second inclined region 334.
• the cross-sectional area of the first inclined region 332 decreases progressively from its proximal ends 336 and 337 on the circumference of the main body 320 to its distal ends 338, 339.
• the first inclined region 332 includes an upper inclined surface 332a and a lower inclined surface 332b.
• the upper inclined surface 332a is inclined downward at a prescribed angle from its proximal end 336 located above the longitudinal axis to its distal end 338 located below the longitudinal axis X, whereas the lower inclined surface 332b is inclined upward from its proximal end 337 to its distal end 339.
• the diameter d of the main body 320 is approximately 0.6mm ⁇ 1.2mm
• the inclination angle ⁇ 4 made by the upper inclined surface 332a and the lower inclined surface 332b of the first inclined region is approximately 15° to 20°.
• the cross-sectional area of the second inclined region 334 decreases progressively from its proximal ends 338 and 339 to its distal end 340.
• the second inclined region 334 includes an upper inclined surface 334a and a lower inclined surface 334b, which are bilaterally symmetric on a longitudinal axis Y, which passes through the distal end 340 of the second inclined region 334 (refer to Fig. 7).
• the proximal ends 338, 339 of the second inclined region 334 are located at the same points as the distal ends of the first inclined region 332.
• the distal end 340 is a tip, which is configured to permit piercing of the patient's skin.
• the inclination angle ⁇ 5 made by the upper and lower inclined surfaces 334a and 334b of the second inclined region 334 is approximately 30° to 45°. As shown in Fig.
• each tapered portion 346 is inclined at a predetermined angle ⁇ with respect to the longitudinal axis X.
• the tip 340 is positioned below the axis X (refer to Fig. 7), and has a prescribed radius of curvature.
• Curved portions 344 are formed at the points of juncture of the tip 340 and the tapered portions 346, which are rounded at a prescribed radius of curvature. It is desirable for the inclination angle ⁇ g of the tapered portion 346 to be approximately 5° ⁇ 15°.
• a tubular bore 348 for injection is formed through the main body 320 and the tip portion 330 along the longitudinal axis X.
• An opening 348' of the bore 348 is exposed outside on the upper inclined surface 332a of the first inclined region 332, as shown in Fig. 8.
• the explanation and drawings of the apparatus or instrument, to which the needle is connected for performing injections or sampling cerebrospinal fluid through the bore 348, are omitted herein since it is well known in the art.
• the side surfaces of the first inclined region 332 of the tip portion 330 are round, but the tip 340 is shaped flat and sharp due to the second inclined region 334. However, the tip 340 becomes rounder and blunter as it goes from its center to the curved portions 344.
• the center of the tip 340 is sharp but flat, it is used only to pierce through the patient's skin, and hardly to perforate the nerve or blood vessel, thus minimizing the damage on the nerve or blood vessel. Moreover, since the tip 340 becomes rounder and blunter from its center to the curved portions 344 and the tapered portions 346, the needle does not slit the tissue but pushes therethrough as it progresses to the object region or point, thus causing little injury to the tissue.
• the medical needle of the third embodiment is advantageous in that no fiber tissues such as fascia can get caught in the opening 348' of the bore 348 since the opening 348' is located on the upper inclined surface 332a of the first inclined region 332 (as opposed to the needle of the above-described second embodiment, in which the opening 248' of the bore 248 is located at the tip 240). Therefore, the needle of the second embodiment is more appropriate for treating the articular region where important nerve or blood vessels are not much distributed, whereas the needle of the third embodiment is more appropriate for treating the nerve roots of the spine, etc. INDUSTRIAL APPLICABILITY As explained above in detail, the center of the tip is sharp but flat.
• the medical needle of the present invention when the medical needle of the present invention is inserted into a nerve, muscle or fascia, which is in need of stimulation therapy and/or injection therapy, it is used only to pierce through the patient's skin, and hardly to perforate the nerve or blood vessel, thus minimizing the damage on the nerve or blood vessel. Also, since the tip becomes rounder and blunter from its center to the curved portions and the tapered portions, the needle does not slit the tissue, but rather pushes therethrough as it progresses to the object region or point, thus causing little injury to the tissue.
• the flat and rounded tip and curved portions have little possibility of penetrating the dura mater, thus preventing severe headache which may be caused by penetrating the dura mater.
• the spinal cord and nerve roots are not injured by the characteristics in the shape of the needle, thus preventing severe side effects such as physical paralysis or neuropathy of the patient.
• the injection can emit straight from the tip, it enables precise injection into the object region or point and minimizes the loss of injection into surrounding tissues.

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• Health & Medical Sciences (AREA)
• Vascular Medicine (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

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• 2004
  • 2004-06-08 KR KR1020040041689A patent/KR100672875B1/ko active IP Right Grant
• 2005
  • 2005-06-07 WO PCT/KR2005/001692 patent/WO2005120609A1/en active Application Filing
  • 2005-06-07 US US11/629,038 patent/US8257392B2/en active Active
  • 2005-06-07 CN CNB200580026617XA patent/CN100522270C/zh active Active

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