CN107049433B - Magnetostrictive direction adjustable puncture needle structure - Google Patents
Magnetostrictive direction adjustable puncture needle structure Download PDFInfo
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- CN107049433B CN107049433B CN201710310406.3A CN201710310406A CN107049433B CN 107049433 B CN107049433 B CN 107049433B CN 201710310406 A CN201710310406 A CN 201710310406A CN 107049433 B CN107049433 B CN 107049433B
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- puncture needle
- magnetostrictive
- guide sleeve
- needle
- sleeved
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- 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
- A61B17/3403—Needle locating or guiding means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/0045—Devices for taking samples of body liquids
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- 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
- A61B17/3403—Needle locating or guiding means
- A61B2017/3405—Needle locating or guiding means using mechanical guide means
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- Heart & Thoracic Surgery (AREA)
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- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Hematology (AREA)
- Surgical Instruments (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a magnetostrictive direction adjustable puncture needle structure, which comprises: an outer puncture needle; the inner puncture needle is sleeved in the outer puncture needle; the propelling mechanism comprises a propelling rod, the front end of the propelling rod is fixedly connected with the inner puncture needle, and the propelling rod is sleeved in the outer puncture needle; the steering mechanism comprises a guide sleeve, a magnetostrictive sheet and an electrified lead, the guide sleeve is sleeved outside the outer puncture needle, the magnetostrictive sheet is embedded in the guide sleeve and symmetrically arranged, the electrified lead is positioned on the magnetostrictive steering guide sleeve and connected with the magnetostrictive sheet, and the deviation angle of the inner puncture needle is controlled by providing displacement difference generated by different voltages for the magnetostrictive sheet through the electrified lead. The invention guides the inner puncture needle to smoothly pass through important blood vessels and peripheral normal tissues by controlling the deflection angle, has simple structure, flexible control and high guiding precision, and overcomes the defect of radial direction steering of the existing puncture needle and the auxiliary positioning structure thereof in the probing process.
Description
Technical Field
The invention relates to the technical field of hygienic surgical instrument puncture needles, in particular to a direction-adjustable puncture needle structure.
Background
The puncture is a diagnosis and treatment technology for puncturing a puncture needle into a human body cavity to extract secretion for testing, injecting gas or a contrast medium into the body cavity for radiography examination, or injecting medicine into the body cavity, aims to extract blood for testing, blood transfusion, liquid transfusion and be placed into a catheter for angiography, and is widely applied to the surgical technical fields of brain or spinal cavity puncture, chest cavity puncture, abdominal cavity puncture, visceral organ puncture and the like.
Chinese patent application 201611214588.6 discloses an all-angle puncture guiding device, which provides a puncture needle holder structure, and places the puncture needle holder on an arc-shaped slide rail, so that the puncture needle always points to the spherical center of the arc-shaped slide rail during sliding, and the all-angle puncture of the puncture needle is realized.
Chinese patent application 201611099056.2 discloses a puncture outfit consisting of a sleeve, a suction tube, a puncture needle head and two steel wires made of spring steel materials, and the adjustment of the axial angle is realized through the rotation of the steel wires.
Chinese patent application 201610960958.4 has adopted three subassemblies such as fixed part, rotating part and guide part, realizes the axial of pjncture needle and rotates.
Chinese patent application 201610935113.X uses a link and a spherical hinge structure to adjust the position and angle of the puncture point outside the patient. In order to relieve the pain of a patient and reduce the damage to peripheral tissues, the puncture accuracy is required to be kept between 0.5mm and 1mm, and the index puts higher requirements on puncture path planning. However, while ensuring accurate puncture trajectory planning, it is inevitable to damage some peripheral tissues, especially the change in brain tissue location caused by the release of spinal fluid during deep brain punctures. At this time, if the brain blood vessels, cranial nerve fibers, etc. cannot be avoided, intracranial hemorrhage may occur, nerve dysfunction may occur, and irreparable tissue damage may be brought about.
The prior art only provides a design method for improving the initial positioning accuracy and the axial rotation of a puncture needle, and cannot provide a design method for avoiding important tissues such as blood vessels and the like from the structural design. In order to make up for the design defects, the invention provides a puncture needle structure with an adjustable magnetostrictive direction.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to overcome the defect that the conventional puncture needle and an auxiliary positioning structure thereof cannot avoid normal important tissues near blood vessels and focuses in the process of probing, and provides a magnetostrictive direction adjustable puncture needle structure.
In order to achieve the above object, the present invention provides a magnetostrictive direction adjustable puncture needle structure. It includes:
an outer puncture needle;
the inner puncture needle is sleeved in the outer puncture needle;
the propelling mechanism comprises a propelling rod, the front end of the propelling rod is fixedly connected with the inner puncture needle, and the propelling rod is sleeved in the outer puncture needle;
the steering mechanism comprises a guide sleeve, magnetostrictive sheets and an electrified lead, the guide sleeve is sleeved outside the outer puncture needle, the magnetostrictive sheets are embedded into the guide sleeve and are symmetrically arranged, the electrified lead is positioned on the magnetostrictive steering guide sleeve and is connected with the magnetostrictive sheets, and the deviation angle of the inner puncture needle is controlled by providing voltage difference generated by different voltages for the magnetostrictive sheets through the electrified lead.
According to the invention, an inner puncture needle is sleeved in the outer puncture needle, the pushing of the inner puncture needle is controlled by the pushing rod, and the pushing rod is guided by the guide sleeve so as to control the pushing direction of the inner puncture needle, thereby realizing the direction-adjustable puncture needle structure. The guide sleeve supplies different voltages to the magnetostrictive sheets which are symmetrically arranged through the electrified lead to generate voltage difference, so that the two magnetostrictive sheets generate different telescopic effects, and the guide sleeve is controlled to generate a deflection angle to control the advancing direction of the inner puncture needle. The direction-adjustable puncture needle provided by the invention has the advantages of simple structure, low cost, convenience in operation and high guiding precision, and overcomes the defect of radial direction steering of the conventional puncture needle and an auxiliary positioning structure thereof in the probing process.
According to another embodiment of the present invention, the guide sleeve is made of rubber material and the inside of the guide sleeve is made of piezoelectric ceramic material.
According to another embodiment of the present invention, the lancet structure further comprises a plurality of spring tabs; the spring cards are fixed on the inner wall of the outer puncture needle and are uniformly arranged at equal intervals.
According to another embodiment of the invention, the rear end of the inner puncture needle is provided with a notch for matching the spring clamping piece.
According to another embodiment of the invention, the outer puncturing needle is connected with the guide sleeve through a connecting sealing sleeve, the connecting sealing sleeve is of a semicircular structure, and a semicircular groove is correspondingly formed in the outer surface of the outer puncturing needle.
According to another embodiment of the invention, the inner puncture needle is arranged inside the outer puncture needle, the diameter of the inner puncture needle is 0.02mm to 0.05mm smaller than that of the outer puncture needle, and the natural length of the spring clip is 0.15mm to 0.2mm.
According to another embodiment of the present invention, the guide sleeve further comprises a lightweight steel wire for increasing the rigidity.
According to another embodiment of the invention, the lightweight steel wire and the magnetostrictive sheet are both two and are embedded in the magnetostrictive steering guide sleeve and symmetrically configured.
According to another embodiment of the present invention, the number of the current-carrying wires is two, and the two magnetostrictive sheets are controlled respectively.
According to another embodiment of the invention, the magnetostrictive sheet generates different deflection angles through the voltage difference of the electrified lead, and the voltage difference is calculated through a piezoelectric ceramic driving curve.
Compared with the prior art, the invention has the following beneficial effects:
1. the guide sleeve made of flexible rubber materials provides direction guide control for the inner puncture needle through deflection angles generated by different stretching effects of the symmetrically-arranged magnetostrictive sheets, and the calculation result is accurate and the operation can be controlled in real time according to the voltage difference required by the piezoelectric ceramic driving curve two-way electric leads;
2. the inner puncture needle is clamped and locked by the spring clamping pieces, so that the phenomenon that the inner puncture needle slips backwards due to resistance of blood vessels and tissues in the probing process is prevented, and the safety and the stability of the puncture process are ensured;
3. the light steel wire is adopted to support the guide sleeve, so that the rigidity of the guide sleeve is increased in a certain direction, the guide sleeve is supported and protected, the push rod is protected from being pressed, the secretion is prevented from being blocked when being extracted, and the service life of the guide sleeve is prolonged.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a structural view of a magnetostrictive direction adjustable puncture needle according to embodiment 1.
Fig. 2 is a structural view of a steering structure in embodiment 1.
Detailed Description
Example 1
The embodiment provides a puncture needle structure with adjustable magnetostrictive directions. Fig. 1 is a structural view of a magnetostrictive direction adjustable puncture needle according to this embodiment. As shown, the puncture needle structure comprises:
an outer puncture needle 1;
an inner puncture needle 5, which is sleeved inside the outer puncture needle;
the propelling mechanism comprises a propelling rod 3, the front end of the propelling rod is fixedly connected with the inner puncture needle, and the propelling rod is sleeved in the outer puncture needle;
the steering mechanism comprises a guide sleeve 2, a magnetostrictive sheet 9 and an electrified lead 6, the guide sleeve is sleeved outside the outer puncture needle, the magnetostrictive sheets are embedded into the guide sleeve and are symmetrically arranged, the electrified lead is positioned on the magnetostrictive steering guide sleeve and is connected with the magnetostrictive sheet, and the deviation angle of the inner puncture needle is controlled by providing voltage difference generated by different voltages for the magnetostrictive sheet through the electrified lead.
In the embodiment, the puncture needle structure with adjustable direction is realized by arranging the inner puncture needle, controlling the propulsion of the inner puncture needle through the propulsion rod and guiding the propulsion rod through the guide sleeve so as to control the propulsion direction of the inner puncture needle. The guide sleeve supplies different voltages to the magnetostrictive sheets which are symmetrically arranged through the electrified lead, so that the two magnetostrictive sheets generate different stretching effects to generate a displacement difference, and the guide sleeve is controlled to generate a deflection angle to control the propelling direction of the inner puncture needle.
The outer puncture needle is connected with the guide sleeve through a connecting sealing sleeve 7, the connecting sealing sleeve is of a semicircular structure, and a semicircular groove is correspondingly formed in the outer surface of the outer puncture needle. The outer puncture needle is hermetically connected with the guide sleeve through the connecting seal sleeve, so that the sealing performance and the structural stability of the puncture needle are enhanced, and the leakage of secretion caused by the extraction of the secretion is prevented. In this embodiment, the guide sleeve is made of a rubber flexible material, and the interior of the guide sleeve is made of a piezoelectric ceramic material.
In this embodiment, the guide sleeve further includes a light steel wire 8 for increasing the rigidity. This embodiment adopts the light steel wire to support the uide bushing, has increased rigidity for the uide bushing in certain direction, plays to support the guard action and protects the pushing ram not to be stressed to the uide bushing, avoids the extraction of secretion to be obstructed, has increased the life of uide bushing simultaneously.
The puncture needle structure of the embodiment further comprises a plurality of spring clamping pieces 4; the spring cards are fixed on the inner wall of the outer puncture needle and are uniformly arranged at equal intervals. The spring card is used for blocking and locking the inner puncture needle, the phenomenon that the inner puncture needle slips after meeting with the resistance of blood vessels and tissues in the probing process is prevented, the safety and the stability of the puncture process are ensured, and the corresponding rear end of the inner puncture needle is provided with a notch used for being matched with the spring card.
The inner puncture needle is arranged inside the outer puncture needle, the diameter of the inner puncture needle is 0.02mm-0.05mm smaller than that of the outer puncture needle, and the length of the spring card in a natural state is 0.15mm-0.2mm.
In the embodiment, the number of the light steel wires and the number of the magnetostrictive sheets are two, and the light steel wires and the magnetostrictive sheets are embedded in the magnetostrictive steering guide sleeve and are symmetrically arranged. And two corresponding electrified leads are also used for respectively controlling the two magnetostrictive sheets. Different voltage values are applied to the magnetostrictive devices which are symmetrically arranged respectively to obtain two symmetrical different displacements, and the displacement difference generates a deflection angle on the symmetrical plane, so that the deflection angle of the guide puncture needle is controlled.
The displacement required to be generated by the magnetostrictive sheet and the voltage provided by the electrified lead are calculated through a piezoelectric ceramic driving curve.
The relation between the voltage of the electrified lead and the displacement model and the elementary hysteresis characteristic of the magnetostrictive sheet is as follows:
in the formula: u. of max Denotes the maximum drive voltage, u, of the magnetostrictive device 0 A value of a voltage at a turning point, l, representing a driving voltage max Representing the maximum extension of the actuator relative to the free state,/ 0 Represents the elongation of the actuator relative to the free state at the transition point of the driving voltage, S' + ，S′ - Hysteresis characteristic curves, S, representing the measured forward and reverse displacements, respectively + ，S - Respectively representing the magnetostrictive device drive voltage by u 0 The voltage-micro displacement relationship of the starting forward and reverse movements, and the Δ u represents the variation of the driving voltage relative to the turning point voltage value.
When this embodiment pjncture needle structure used, divide into two parts with the puncture action, at first carry out ordinary puncture through outer puncture needle, when great vessel appears in the puncture route, when the condition such as tissue slides, through passing through the electrical conduction line to the magnetostrictive sheet and adding different electric quantities, the magnetostrictive sheet that makes two opposite directions produces different displacements, thereby make magnetostrictive turn to uide bushing and produce a deflection angle, interior pjncture needle continues to carry out the secondary puncture under the effect of pjncture needle pushing ram including, the secondary puncture in-process, set up a plurality of spring cards, the interval equals between every spring card, the spring card realizes the locking function to the intrinsic force pjncture needle through its elastic deformation.
According to the structure shown in the figures 1 and 2, the puncture needle is radially steered through the magnetostrictive sheets which are symmetrically arranged, and the light steel wire support which is orthogonally arranged with the magnetostrictive sheets is adopted to realize the normal probing of the magnetostrictive steering guide sleeve in the ordinary puncture process.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
Claims (8)
1. The utility model provides a magnetostriction direction adjustable puncture needle structure which characterized in that, puncture needle structure includes:
an outer puncture needle;
the inner puncture needle is sleeved in the outer puncture needle;
the propelling mechanism comprises a propelling rod, the front end of the propelling rod is fixedly connected with the inner puncture needle, and the propelling rod is sleeved in the outer puncture needle;
the steering mechanism comprises a guide sleeve, magnetostrictive sheets and an electrified lead, the guide sleeve is sleeved outside the outer puncture needle, the magnetostrictive sheets are embedded in the guide sleeve and are symmetrically arranged, the electrified lead is positioned on the guide sleeve, the electrified lead is connected with the magnetostrictive sheets, and the deviation angle of the inner puncture needle is controlled by providing voltage difference generated by different voltages for the magnetostrictive sheets through the electrified lead;
the outer puncture needle is connected with the guide sleeve through a connecting sealing sleeve, the connecting sealing sleeve is of a semicircular structure, and a semicircular groove is correspondingly formed in the outer surface of the outer puncture needle;
the magnetostrictive sheets generate different deflection angles through the voltage difference of the electrified conducting wires, and the voltage difference is obtained through calculation of a piezoelectric ceramic driving curve.
2. A puncture needle structure according to claim 1, characterized in that the guide sleeve is of rubber material and inside it is of piezoceramic material.
3. The piercing needle structure of claim 1, further comprising a plurality of spring clips; the spring clamping pieces are fixed on the inner wall of the outer puncturing needle and are uniformly arranged at equal intervals.
4. A puncture needle structure according to claim 3, characterized in that the rear end of the inner puncture needle is provided with a notch for engaging the spring catch.
5. A puncture needle structure according to claim 3, wherein the inner puncture needle is disposed inside the outer puncture needle, the inner puncture needle has a diameter 0.02mm to 0.05mm smaller than the outer puncture needle, and the spring clip has a natural length of 0.15mm to 0.2mm.
6. The needle structure of claim 1 wherein said guide sheath further comprises a lightweight wire for added stiffness.
7. The needle structure of claim 6 wherein said lightweight wire and said magnetostrictive plate are both embedded in said guide sleeve in a symmetrical configuration.
8. A puncture needle structure according to claim 1, wherein there are two of said energizing leads for respectively controlling two of said magnetostrictive plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710310406.3A CN107049433B (en) | 2017-05-05 | 2017-05-05 | Magnetostrictive direction adjustable puncture needle structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710310406.3A CN107049433B (en) | 2017-05-05 | 2017-05-05 | Magnetostrictive direction adjustable puncture needle structure |
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| CN107049433A CN107049433A (en) | 2017-08-18 |
| CN107049433B true CN107049433B (en) | 2023-03-24 |
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| CN201710310406.3A Active CN107049433B (en) | 2017-05-05 | 2017-05-05 | Magnetostrictive direction adjustable puncture needle structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111938788B (en) * | 2020-08-25 | 2021-07-30 | 哈尔滨医科大学 | Interatrial septum puncture assembly |
| CN113081252B (en) * | 2021-05-17 | 2022-11-08 | 广西医科大学 | Mobile radio frequency ablation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364221B1 (en) * | 1999-09-29 | 2002-04-02 | Siemens Automotive Corporation | Electronic fuel injector actuated by magnetostrictive transduction |
| CN101495175A (en) * | 2006-05-22 | 2009-07-29 | 帝国生物医学设备公司 | Method and device for enhanced blood flow |
| CN102579088A (en) * | 2012-01-13 | 2012-07-18 | 天津科技大学 | Three-dimensional navigation controllable magnetic field device on basis of permanent magnet array |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070173870A2 (en) * | 2005-10-18 | 2007-07-26 | Jaime Zacharias | Precision Surgical System |
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- 2017-05-05 CN CN201710310406.3A patent/CN107049433B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6364221B1 (en) * | 1999-09-29 | 2002-04-02 | Siemens Automotive Corporation | Electronic fuel injector actuated by magnetostrictive transduction |
| CN101495175A (en) * | 2006-05-22 | 2009-07-29 | 帝国生物医学设备公司 | Method and device for enhanced blood flow |
| CN102579088A (en) * | 2012-01-13 | 2012-07-18 | 天津科技大学 | Three-dimensional navigation controllable magnetic field device on basis of permanent magnet array |
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| CN107049433A (en) | 2017-08-18 |
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