Potential guide intrathecal implantation catheter real-time positioning system

Abstract

The utility model discloses a real-time positioning system for implanting a catheter in a potential guiding sheath. The real-time positioning system comprises a positioning electrode plate, a potential guiding instrument and a guide wire body, the positioning electrode plate comprises an adhesive tape adhered to the body of a patient and a plurality of electrode plates arranged on the adhesive tape; the potential guiding instrument comprises a shell, positive and negative electrodes, a current change display and a voltage and current regulator are arranged on the shell, and a current signal receiver and a signal amplifier are arranged in the shell; the guide wire body comprises an insulating sleeve and a metal guide wire arranged in the insulating sleeve, the front end and the rear end of the insulating sleeve are closed, and a plurality of through holes are formed in the side wall; the head end of the metal guide wire is exposed, and the other part is wrapped by the insulating layer. The positioning electrode plate and the wire guide body are respectively connected with positive and negative electrodes to form a closed loop. The intrathecal infusion system solves the problems that in the implantation operation process of the intrathecal infusion system, the position of the catheter needs to be adjusted in a perspective mode repeatedly, real-time monitoring cannot be achieved, and the developing quality is not high, operation precision and efficiency are improved, and the X-ray exposure amount of a patient is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and relates to a potential guiding intrathecal implantation catheter real-time positioning system. BACKGROUND

[0002] Intrathecal drug infusion system implantation is a minimally invasive surgical method for implanting an intrathecal catheter into the subarachnoid space and establishing a corresponding drug infusion system (port or electronic infusion pump) under the skin to directly deliver drugs to the subarachnoid space, so that the drugs directly act on the spinal pain center, thereby achieving the purpose of controlling pain. The intrathecal drug infusion system mainly consists of two parts: an intrathecal catheter and a drug infusion system. Drugs can be infused into the subarachnoid space for a long time.

[0003] In the prior art intrathecal implantation catheter process, C-arm machine is always needed for repeated perspective positioning, which has obvious defects: (1) X-ray repeated perspective is needed during the operation process, the radiation amount is large, and the on-site operator needs to avoid radiation at any time to increase the operation time and reduce the operation efficiency; (2) the machine equipment has large volume and low degree of freedom, lacks certain operation convenience, and is difficult to monitor the running track of the guide wire in real time; (3) the development quality is not high, the positioning accuracy is low, the treatment effect after the catheter implantation is affected, and the overall precision and efficiency of the operation are low. UTILITY MODEL CONTENTS

[0004] The utility model in the prior art intrathecal implantation catheter process, C-arm machine is always needed for repeated perspective positioning, which has obvious defects: (1) X-ray repeated perspective is needed during the operation process, the radiation amount is large, and the on-site operator needs to avoid radiation at any time to increase the operation time and reduce the operation efficiency; (2) the machine equipment has large volume and low degree of freedom, lacks certain operation convenience, and is difficult to monitor the running track of the guide wire in real time; (3) the development quality is not high, the positioning accuracy is low, the treatment effect after the catheter implantation is affected, and the overall precision and efficiency of the operation are low.

[0005] The design principle of the utility model is as follows: the positioning electrode plate is pasted on the patient's posterior spine along the longitudinal direction of the human body, and conductive paste is needed between the positioning electrode plate and the skin to reduce the contact resistance; the guide wire body enters the body through the incision, and the body fluid forms a current loop, and there is a fixed potential difference between the metal probe of the guide wire body and the positioning electrode plate outside the body. When the guide wire head gradually approaches an electrode piece, the amount of body fluid flowing through the current decreases (i.e. the resistance becomes smaller), and the current gradually increases. When the guide wire head travels to the lower side of the positioning electrode plate, the human body resistance is minimum, and the output current is maximum. The current change amount is sampled and amplified by the potential guide instrument, and the current change display is driven to indicate that the guide wire head position is just below the positioning electrode piece, thereby realizing real-time and accurate positioning of the guide wire head.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] The potential guiding intrathecal implantation catheter real-time positioning system has the following technical features: a positioning electrode plate, a potential guiding instrument and a guide wire body are electrically connected.

[0008] The positioning electrode plate comprises adhesive adhesive strips pasted on the patient's body and a plurality of electrode pieces arranged on the adhesive strips; the potential guiding instrument comprises a shell, the shell is provided with positive and negative electrodes, a current change display, a voltage and current regulator, the shell is provided with a current signal receiver and a signal amplifier; the guide wire body comprises an insulating sleeve and a metal guide wire arranged in the insulating sleeve, the insulating sleeve is closed at both ends, a plurality of through holes are arranged on the side wall; the head end of the metal guide wire is exposed, and the remaining part is covered by an insulating layer. The positioning electrode plate and the guide wire body are connected to the positive and negative electrodes to form a closed loop.

[0009] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the adhesive strip is an adhesive silica gel strip, and conductive paste is applied between the adhesive silica gel strip and the skin to reduce the contact resistance.

[0010] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the number of electrode pieces is 13. Each positioning electrode piece corresponds to a protrusion or a recess of a vertebra, which can prevent the electrode piece from falling off and realize previous positioning during the catheter implantation process.

[0011] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the current change display is a sensitive ammeter or an electronic digital display. The sensitive ammeter realizes current change indication through the deflection degree of a pointer, and the electronic digital display realizes current change indication by displaying the current value in real time.

[0012] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the insulating sleeve of the guide wire body is a silica gel sleeve, and a plurality of through holes are arranged on the side wall of the front end portion of the silica gel sleeve. Silicone is a commonly used material in the medical field, and has high biocompatibility and is suitable for implantation in the body; the through holes serve as body fluid inflow holes, connect the positioning electrode plate outside the body and the guide wire body inside the body to form a closed loop, and generate a potential difference between the two.

[0013] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the head end and the tail end of the metal guide wire are fixedly connected to the inner wall of the silica gel sleeve, and the tail end portion is provided with an electrode connecting head connected to the electrode of the potential guiding instrument.

[0014] Preferably, in the potential guiding intrathecal implantation catheter real-time positioning system, the part outside the head end of the metal guide wire is insulated by a lacquer coating layer, and only the head end metal wire is exposed.

[0015] Preferably, the real-time positioning system of the potential guiding intrathecal implant catheter is provided with a handle on the potential guiding instrument shell.

[0016] Compared with the prior art, the potential guiding intrathecal implant catheter real-time positioning system has the beneficial effects that:

[0017] The potential guiding intrathecal implant catheter real-time positioning system is small in size, portable in design, realizes positioning by detecting current change, and has no electromagnetic radiation, thereby avoiding the danger of X-ray radiation to the on-site operator and eliminating the harm of radiation to the patient during the catheter implantation process, which is undoubtedly good for doctors and patients.

[0018] The potential guiding intrathecal implant catheter real-time positioning system is small in size, portable in design, realizes positioning by detecting current change, and has no electromagnetic radiation, thereby avoiding the danger of X-ray radiation to the on-site operator and eliminating the harm of radiation to the patient during the catheter implantation process, which is undoubtedly good for doctors and patients. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the potential guiding intrathecal implant catheter real-time positioning system.

[0020] Figure 2 It is an internal structure schematic view of the potential guiding instrument.

[0021] Figure 3 It is a use state schematic view of the potential guiding intrathecal implant catheter real-time positioning system. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] According to Figure 1 , the potential guiding intrathecal implant catheter real-time positioning system 100 comprises a positioning electrode plate 1, a potential guiding instrument 2 and a guide wire body 3 connected electrically. The positioning electrode plate 1 is arranged on the patient's body, the guide wire body 3 is inserted into the human body, and the two are connected to the positive and negative electrodes of the potential guiding instrument 2 respectively, and a closed loop is formed under the conductive communication of the body fluid of the human body.

[0024] The positioning electrode plate 1 comprises a sticky adhesive tape 11 pasted on the patient's body and a plurality of electrode pieces 12 arranged on the sticky adhesive tape; the sticky adhesive tape 11 is a sticky silicon adhesive tape, and conductive paste is applied between the sticky silicon adhesive tape and the skin during use, so as to reduce the contact resistance. The number of the electrode pieces is 13, and each positioning electrode piece corresponds to a protrusion or a recess of a vertebra, so that the positioning electrode piece can prevent falling and realize previous positioning during catheter implantation.

[0025] In combination with Figure 1 and Figure 2 , the potential guide instrument 2 is approximately a cuboid, comprising a shell 21, a handle 22 arranged at the top of the shell for convenient carrying, a positive electrode 23, a negative electrode 24, a current change display 25, a voltage regulator 26 and a current regulator 27 arranged on the front end face, and a current signal receiver 28, a signal amplifier 29 and a controller arranged inside.

[0026] The shell 21 is made of plastic or stainless steel; the positive electrode 23 and the negative electrode 24 are respectively connected to the positioning electrode plate 1 and the guide wire body 3 as connection ports, so as to realize the electrical connection of the potential guide instrument 2 and the positioning electrode plate 1 and the guide wire body 3. The current change display 25 can be a sensitive ammeter or an electronic digital display, the sensitive ammeter realizes current change indication through the deflection degree of a pointer, and the electronic digital display realizes current change indication through the real-time display of current value; in the specific embodiment of the utility model, the sensitive ammeter is selected.

[0027] The voltage regulator 26 and the current regulator 27 are used for regulating the output voltage of the guide wire body, different potential differences between the probe and the positioning electrode pieces are set according to the individual physical differences of different patients, so as to regulate different current parameters flowing through the human body, obtain different sensitive ammeter driving currents, make the deflection angle of the sensitive ammeter pointer more sensitive, and improve the positioning accuracy.

[0028] The current signal receiver 28 receives the current value of the guide wire body 3 during the movement in the body in real time, the signal amplifier 29 simultaneously amplifies the current value by a predetermined ratio, and displays the current value through the current change display 25.

[0029] The guide wire body 3 comprises an insulating sleeve 31 and a metal guide wire 32 arranged in the insulating sleeve 31. The insulating sleeve 31 is closed at both ends, and a plurality of through holes 311 are arranged on the side wall of the front end portion; the head end of the metal guide wire 32 is exposed, and the remaining portion is covered by a paint coating layer 321, that is, the portion outside the head end of the metal guide wire is insulated, and only the head end metal wire is exposed.

[0030] Preferably, the insulating sleeve 31 is a silica gel sleeve, and a plurality of through holes 311 are arranged on the sidewall of the silica gel sleeve. Silica gel is a commonly used material in the medical field, and has high biocompatibility, and is suitable for implantation in the body. The through holes serve as body fluid inflow holes, and connect the positioning electrode plate outside the body and the guide wire body inside the body to form a closed loop, and generate a potential difference between the two.

[0031] In the fixing aspect, the head and tail ends of the metal guide wire 32 are fixedly connected with the inner wall of the silica gel sleeve, and the tail end portion is provided with an electrode connecting head, which is connected with the electrode of the potential guiding instrument.

[0032] The use method or principle of the real-time positioning system of the potential guiding intrathecal implantation catheter in the utility model is as follows:

[0033] In combination with Figure 3 The positioning electrode plate 1 is pasted on the posterior spine of the patient along the longitudinal direction of the human body. In order to reduce the contact resistance, conductive paste needs to be applied between the positioning electrode plate and the skin. According to the needs, each positioning electrode sheet can correspond to the protrusions or depressions of the spine.

[0034] The guide wire body 3 and the positioning electrode plate 1 are respectively connected with the negative electrode and the positive electrode, and the head end of the guide wire body is inserted into the human spine from the incision. The body fluid of the human body flows into the sleeve and the metal guide wire through the through holes on the insulating sleeve 31 of the guide wire body. The body fluid of the human body is a conductor. In this way, a fixed potential difference exists between the metal probe and the positioning electrode plate outside the body, and the current loop is formed by the body fluid of the human body.

[0035] When the head end of the guide wire body gradually approaches the first electrode sheet, the amount of body fluid through which the current flows decreases (i.e. the resistance becomes smaller), and the current gradually increases. When the head end of the guide wire body travels to the position below the positioning electrode plate, the human body resistance is the smallest, and the output current is the largest. The change amount of the current is sampled and amplified by the potential guiding instrument, the angle of deflection of the sensitive ammeter pointer is the largest, which indicates that the position of the guide wire head is just below the first positioning electrode sheet, thereby realizing the real-time and accurate positioning of the guide wire head. Similarly, the guide wire head is continuously pushed forward, and in the process of traveling to the second positioning electrode, the potential guiding instrument output current will also change from small to large. The potential guiding instrument amplifies the changed current, and drives the sensitive ammeter pointer to deflect. When the deflection angle of the sensitive ammeter pointer is the largest, it indicates that the position of the guide wire head is just below the second positioning electrode sheet. In this way, the accurate positioning of the guide wire head position of all positioning electrode sheet positions can be realized.

[0036] The utility model overcomes the problems that the position of the catheter needs to be repeatedly adjusted by fluoroscopy, real-time monitoring cannot be realized, and the development quality is not high during the intrathecal infusion system implantation process, improves the operation precision and efficiency, and reduces the X-ray exposure amount of the patient.

[0037] The preferred embodiments of the utility model have been specifically explained above, but the utility model is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the application.

Claims

1. A potential-guided intrathecal implant catheter real-time positioning system, characterized in that, The system comprises a positioning electrode plate, a potential guide instrument and a guide wire body connected by electricity, The positioning electrode plate comprises a sticky adhesive tape attached to the patient's body and a plurality of electrode pieces arranged on the adhesive tape. The potential guide instrument comprises a shell with positive and negative electrodes, a current change display, a voltage and current regulator, a current signal receiver and a signal amplifier arranged in the shell. The guide wire body comprises an insulating sleeve and a metal guide wire arranged in the insulating sleeve, the insulating sleeve is closed at both ends, and a plurality of through holes are arranged on the side wall of the front half portion; the head end of the metal guide wire is exposed, and the rest is covered by an insulating layer. The positioning electrode plate and the guide wire body are connected to the positive and negative electrodes to form a closed loop.

2. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein the adhesive tape is a sticky silicone adhesive tape, and conductive paste is applied between the sticky silicone adhesive tape and the skin. wherein 3. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein the number of electrode pieces is 13.

4. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein the current change display is a sensitive ammeter or an electronic digital display. wherein 5. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein the insulating sleeve is a silicone sleeve, and a plurality of through holes are arranged on the side wall of the front end portion of the silicone sleeve.

6. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 5, wherein the head and tail ends of the metal guide wire are fixedly connected to the inner wall of the silicone sleeve, and the tail end portion is provided with an electrode connector. wherein, 7. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein the part of the metal guide wire outside the head end is insulated by a lacquering layer.

8. The real-time positioning system for the potential guide intrathecal implant catheter according to claim 1, wherein a handle is arranged on the shell of the potential guide instrument. wherein ​ ​ wherein ​ ​ wherein ​ ​ wherein ​

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