CN116277173B - PICC catheter positioning and cutting device and PICC catheter cutting method - Google Patents

PICC catheter positioning and cutting device and PICC catheter cutting method Download PDF

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Publication number
CN116277173B
CN116277173B CN202310595342.1A CN202310595342A CN116277173B CN 116277173 B CN116277173 B CN 116277173B CN 202310595342 A CN202310595342 A CN 202310595342A CN 116277173 B CN116277173 B CN 116277173B
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CN
China
Prior art keywords
outer sleeve
cutting device
round hole
tube
catheter
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Application number
CN202310595342.1A
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Chinese (zh)
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CN116277173A (en
Inventor
刘艺
江华
曾霞
夏琪
陈仲斌
赵宇翔
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Sichuan Academy Of Medical Sciences Sichuan Provincial People's Hospital
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Sichuan Academy Of Medical Sciences Sichuan Provincial People's Hospital
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Priority to CN202310595342.1A priority Critical patent/CN116277173B/en
Publication of CN116277173A publication Critical patent/CN116277173A/en
Application granted granted Critical
Publication of CN116277173B publication Critical patent/CN116277173B/en
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/20—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Surgical Instruments (AREA)

Abstract

The invention relates to the technical field of PICC catheters, in particular to a PICC catheter positioning and cutting device and a PICC catheter cutting method. The PICC catheter positioning and cutting device comprises a jacket, a cover body, a cutting head, a pushing mechanism, at least one wheel body and a controller; a cylindrical cavity is formed in the outer sleeve, one end of the outer sleeve is in an opening shape, the other end of the outer sleeve is in a sealing shape, and a third round hole is formed in the center of the sealing end of the outer sleeve; the cover body covers the open end of the outer sleeve, a first round hole is formed in the upper surface of the cover body, the first round hole and the third round hole are coaxially arranged, and the cover body is provided with an inner bottom wall and an outer bottom wall. The length of reserving the conduit can be accurately calculated by using the device, the problem that the length of the reserved conduit is too long or too short is avoided, the conduit is not easy to distort, the conduit can be cut off smoothly, the incision surface is smooth, and burrs are few.

Description

PICC catheter positioning and cutting device and PICC catheter cutting method
Technical Field
The invention relates to the technical field of PICC catheters, in particular to a PICC catheter positioning and cutting device and a PICC catheter cutting method.
Background
PICC catheter is the infusion tool that uses more clinically at present, because of having advantages such as safe, effective, high-permeability resistant high-stimulative medicine, complication are few, obtains popularizing in china.
When the catheter is placed, the puncture needle needs to be fixed, the guide wire is sent into the puncture needle, after the guide wire enters a blood vessel, the angle of the puncture needle is reduced, the guide wire is continuously pushed, the guide wire is kept for 10-15cm outside the body, the guide wire is prevented from sliding into the body, the puncture needle is withdrawn, and the guide wire is kept. The tourniquet is loosened, the surface of the tourniquet is broken after the local anesthesia of the puncture point, the cannula sheath is gently inserted in a rotating mode along the guide wire, the lock catch of the expander is unscrewed, the expander and the tearable sheath are separated, the left middle finger and the ring finger press blood vessels to stop bleeding, the thumb fixes the butterfly wing part of the tearable sheath, the cannula sheath is guaranteed not to be displaced, and the right hand withdraws the expander and the guide wire simultaneously. The catheter is slowly and uniformly fed into the preset length along the tearable sheath, then the tearable sheath is withdrawn, the syringe is connected for drawing back blood, after blood is returned, the catheter is separated from the metal handle for supporting the guide wire by using a physiological saline pulse type flushing pipe, and the guide wire is withdrawn flatly and slowly.
Then cleaning blood stain on the catheter, checking the length of the catheter again, reserving the catheter 5cm outside the body so as to install a connector, cutting the catheter vertically, then penetrating the catheter through a decompression sleeve, connecting the catheter with a metal handle of an extension tube, locking the catheter with the decompression sleeve by a light rotation catheter, withdrawing blood again to confirm successful puncture, finally connecting the tail end of the catheter with a seamless infusion connector, sealing the tube by positive pressure and withdrawing a hole towel, cleaning skin around the puncture point, and installing a catheter fixing device.
After the cannula sheath is removed, the redundant catheter is required to be cut off, the catheter 5cm outside the body is reserved for installing the connector, at present, medical staff manually cut off the catheter by using scissors or a cutter at a reserved position according to the sense, so that the sight is blocked, the grasp of the accurate size is affected, the length of the reserved catheter is not in line with the prescribed length of about 5cm, and the cut surface of the catheter is easy to be uneven due to cutting by using the scissors, the connection is not facilitated, and the follow-up use is affected.
Disclosure of Invention
The invention aims at: aiming at the problems that at present, medical staff uses scissors to cut off a catheter at approximate positions by feeling, so that the reserved catheter is long or short and does not meet the specified length of about 5cm, and the incision surface is uneven easily when the scissors are used for cutting off, the PICC catheter positioning and cutting device and the PICC catheter cutting method can accurately calculate the length of the reserved catheter and avoid the overlong or too short length of the reserved catheter.
The PICC catheter positioning and cutting device comprises a jacket, a cover body, a cutting head, a pushing mechanism, at least one wheel body and a controller;
a cylindrical cavity is formed in the outer sleeve, one end of the outer sleeve is in an opening shape, the other end of the outer sleeve is in a sealing shape, and a third round hole is formed in the center of the sealing end of the outer sleeve;
the cover body covers the open end of the outer sleeve, a first round hole is formed in the upper surface of the cover body, the first round hole and the third round hole are coaxially arranged, the cover body is provided with an inner bottom wall and an outer bottom wall, and the inner bottom wall is higher than the outer bottom wall;
an inner tube is arranged in the outer sleeve, the inner tube and the cylindrical cavity are coaxially arranged, a cavity is formed between the upper surface of the inner tube and the inner bottom wall, and the crop is placed in the cavity;
a ring cavity is formed between the inner pipe and the inner wall of the outer sleeve, the pushing mechanism is slidably arranged in the ring cavity, and the pushing mechanism moves upwards to push the crop to move inwards;
the rotary speed sensor and the alarm are both electrically connected with the controller.
According to one embodiment of the invention, the catheter further comprises a polishing mechanism mounted to the sealed end of the outer sleeve, and the polishing mechanism is used for polishing the cut surface of the catheter.
According to one embodiment of the invention, the cutting head comprises a plurality of cutting blocks, the plurality of cutting blocks form annular cutting heads, a horizontally arranged blade is arranged on the inner side surface of each cutting block, a conical surface is formed on the outer side surface of each cutting block, a through hole penetrating through the cutting head is formed on the cutting head, and the through hole and the cutting head are coaxially arranged;
the pushing mechanism comprises a pipe body, a taper pipe is arranged on the inner wall of the pipe body, a gap is formed between the cutting head and the inner wall of the cover body, and the pipe body is pushed to drive the taper pipe to enter the gap;
an elastic piece is connected to the outer side face of each cut block, and the other end of the elastic piece is connected to the inner wall of the cover body.
According to one embodiment of the invention, the outer sleeve is provided with an outer tube, the outer tube and the inner tube are coaxially arranged, and the diameter of the outer tube is larger than that of the inner tube;
the inner tube is higher than the outer tube;
a first annular cavity is formed between the inner wall of the outer tube and the outer side surface of the inner tube, a second annular cavity is formed between the outer tube and the inner wall of the outer sleeve, the tube body is arranged in the second annular cavity, the taper tube is arranged in the first annular cavity, a joint of the tube body and the taper tube is formed with a notch cavity, and the outer tube is arranged in the notch cavity.
According to one embodiment of the present invention, the pushing mechanism further comprises at least one rod body, the rod body is connected to the lower surface of the pipe body, the rod body passes through the lower surface of the outer sleeve, and a ring plate is arranged on the lower surface of the rod body.
According to one embodiment of the present invention, the cover includes a disc, a collar and a side ring, the disc is connected to an upper surface of the collar, an outer diameter of the collar is the same as a diameter of the disc, and the first circular hole is formed on the disc;
the side ring is connected to the side face of the disc, the inner diameter of the side ring is the same as the diameter of the disc, and an annular arc cavity is formed in the lower surface of the disc.
According to one embodiment of the invention, the upper surface of the cover body is provided with at least one groove, the groove is communicated with the first round hole, a rotating shaft is rotatably arranged in the groove, the wheel body is connected to the rotating shaft, the wheel body and the rotating shaft are coaxially arranged, and the rotating speed sensor is arranged on the rotating shaft.
According to one embodiment of the invention, the inner wall of the outer sleeve is connected with a bearing plate, the bearing plate is annular, a step surface is formed on the inner wall of the outer sleeve at a position close to the bottom, the bearing plate is positioned above the step surface, a limiting plate is arranged on the outer side surface of the pipe body at a position close to the bottom, the limiting plate is a ring plate, and the limiting plate is limited between the step surface and the bearing plate.
According to one embodiment of the invention, the lower surface of the outer sleeve is connected with a bottom shell, a protection cavity is formed in the bottom shell, a second round hole is formed in the lower surface of the bottom shell, the second round hole is communicated with the protection cavity, the second round hole is coaxially arranged with the third round hole, and the polishing mechanism is covered in the bottom shell;
the polishing mechanism comprises a first rotating shaft, a second rotating shaft, a first gear, a second gear, a fixed rod, a polishing wheel, a first motor and a second motor; the first rotating shaft is rotatably arranged on the lower surface of the outer sleeve, a first gear is arranged on the first rotating shaft, the second motor is fixed on the lower surface of the outer sleeve, a second rotating shaft is arranged at the output end of the second motor, a second gear is arranged on the second rotating shaft, the second gear is meshed with the first gear, the fixed rod is fixedly connected to the first rotating shaft, the upper surface of one end of the fixed rod is rotatably connected with a polishing wheel, the first motor is arranged on the lower surface of one end of the fixed rod, and the output end of the first motor is connected to the polishing wheel; a stop block is also arranged on the lower surface of the outer sleeve, and the rotation angle of the fixed rod is limited by the stop block;
the first motor and the second motor are electrically connected with the controller.
The PICC catheter cutting method uses the PICC catheter positioning and cutting device, and comprises the following steps:
s1: after the cannula sheath is removed, inserting the catheter into the PICC catheter positioning and cutting device, penetrating the catheter out of the annular plate from the first round hole on the cover body, and pushing the PICC catheter positioning and cutting device along the catheter until the PICC catheter positioning and cutting device is close to the puncture part;
s2: starting a rotation speed sensor through a controller, then pulling back the PICC catheter positioning and cutting device, continuously rotating the wheel body against the catheter, transmitting a signal value to the controller in real time by the rotation speed sensor, converting the rotation speed value into a displacement by the controller, displaying the displacement in a display screen of the controller in real time, and controlling an alarm to give an alarm when the moving distance reaches 5cm by the controller, and stopping pushing the PICC catheter positioning and cutting device by an operator;
s3: pushing the ring plate towards the direction of the cover body, and returning the ring plate after the guide pipe is cut off by the cutting head;
s4: after the second motor is started through the controller and the polishing wheel rotates to a designated position, the controller controls the second motor to stop, and the PICC catheter positioning and cutting device is pushed continuously along the catheter until the tail end of the catheter contacts the polishing wheel, then the controller controls the first motor to start for polishing, after the belt is opened completely, the controller controls the second motor to continue to work so that the polishing wheel returns to the original position, and then the PICC catheter positioning and cutting device is pulled out.
The invention has the beneficial effects that:
the PICC catheter positioning and cutting device provided by the invention comprises: the device comprises a jacket, a cover body, a crop, a pushing mechanism, at least one wheel body and a controller; a cylindrical cavity is formed in the outer sleeve, one end of the outer sleeve is in an opening shape, the other end of the outer sleeve is in a sealing shape, and a third round hole is formed in the center of the sealing end of the outer sleeve; the cover body is covered on the opening end of the outer sleeve, a first round hole is formed in the upper surface of the cover body, the first round hole and the third round hole are coaxially arranged, the cover body is provided with an inner bottom wall and an outer bottom wall, and the inner bottom wall is higher than the outer bottom wall; an inner tube is arranged in the outer sleeve, the inner tube and the cylindrical cavity are coaxially arranged, a cavity is formed between the upper surface of the inner tube and the inner bottom wall, and the crop is placed in the cavity; an annular cavity is formed between the inner tube and the inner wall of the outer sleeve, a pushing mechanism is slidably arranged in the annular cavity, and the pushing mechanism moves upwards to push the cutting head to move inwards; the wheel body is rotatably installed in the first round hole of the cover body, the rotating speed sensor and the alarm are coaxially installed on the wheel body, and the rotating speed sensor and the alarm are electrically connected with the controller.
After removing the cannula sheath, inserting the catheter into the PICC catheter positioning and cutting device, penetrating the catheter from the annular plate through the first round hole on the cover body, pushing the device along the catheter until the device is close to the puncture part, stopping pushing, starting the controller, enabling the rotating speed sensor to be in a zeroing state, slowly pulling the device back, enabling the wheel body to be attached to the catheter for rotation, enabling the rotating speed sensor to convey the rotating speed value to the controller in real time, and enabling the real-time displacement to be calculated through the rotation times, wherein the controller displays the real-time length of the catheter which is vertical in displacement, namely is measured through the display, and when the preset value is reached, enabling the alarm to give an alarm, and enabling an operator to stop non-return pulling. The length of reserving the catheter can be accurately calculated, the problem that the reserved catheter is too long or too short is avoided, the connector and the decompression sleeve are convenient to install subsequently, and the catheter is not easy to twist.
In addition, after measuring the reservation length, operating personnel promotes the annular slab towards lid direction, and the annular slab drives the body of rod and body of pipe and removes towards the lid direction, and when the taper pipe contacted the cutting from beginning, a plurality of cuts began to remove simultaneously, along with the taper pipe then upwards move, thereby the conical surface of supporting the cutting simultaneously promotes the axis department removal of cutting towards the overcoat simultaneously of taper pipe, reaches extreme position gradually to a plurality of blades draw close gradually and cut off the pipe, can be smooth cut off the pipe, and the incision face is level and smooth, and the burr is few for the incision face can be better be connected with the interface of extension pipe metal handle, improves the leakproofness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram illustrating the installation of a PICC catheter positioning and cutting device and a catheter according to an embodiment of the present invention;
FIG. 2 is a first perspective view of an embodiment of the present invention;
FIG. 3 is a schematic view of a structure with a portion of the bottom chassis removed according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view provided by an embodiment of the present invention;
FIG. 5 is a top view of an embodiment of the present invention;
FIG. 6 is a split view provided by an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a cover provided by an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a jacket provided in an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a push assembly provided by an embodiment of the present invention;
fig. 10 is a block diagram of a jacket and sharpening mechanism according to an embodiment of the present invention.
Icon: 1-a jacket; 101-an outer tube; 102-an inner tube; 103-a carrier plate; 2-a cover; 201-a first round hole; 202-side loops; 203-arc chamber; 204-bolts; 205-wheel body; 206-flip; 3-a bottom shell; 301-a second round hole; 4-a controller; 5-a polishing mechanism; 501-a first gear; 502-a fixed rod; 503-a first motor; 504-grinding wheel; 505-a second gear; 506-a second motor; 507-stop; 6-cutting the end; 7-a pushing mechanism; 701-tube body; 703-taper pipe; 704-an absence of a cavity; 705-limiting plate; 8-a rod body; 9-ring plates; 10-a second power supply.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
After the cannula sheath is removed, the redundant catheter needs to be cut off, the catheter 5cm outside the body is reserved for installing the connector, at present, medical staff uses scissors to cut off the catheter at approximate positions by feeling, the reserved catheter has a length which is about 5cm and is not in line with regulations, the tail end of the catheter is too short and is too close to a puncture part, the subsequent operation is inconvenient, the connector and the decompression sleeve are inconvenient to install, the puncture part is easy to touch, the catheter is easy to twist when the catheter is too long, and at least two catheter fixing patches are needed for fixing the catheter.
When cutting off the catheter, at present, medical staff uses scissors to cut off, and the incision surface is uneven easily, and when connecting extension pipe metal handle, the junction of uneven incision surface and extension pipe metal handle produces the gap easily like this, leads to the input liquid to spill.
To this end, as shown in fig. 1 to 10, an embodiment of the present invention provides a PICC catheter positioning and cutting device including a casing 1, a cover 2, a cutting head 6, a pushing mechanism 7, at least one wheel 205, and a controller 4;
a cylindrical cavity is formed in the outer sleeve 1, the upper end of the outer sleeve 1 is in an opening shape, the lower end of the outer sleeve 1 is in a sealing shape, a third round hole is formed in the center of the sealing end of the outer sleeve 1, and the third round hole and the axis of the cylindrical cavity are in the same straight line;
as shown in fig. 4 and 7, the cover body 2 is covered on the open end of the outer sleeve 1, the upper surface of the cover body 2 is provided with a first round hole 201, the first round hole 201 and a third round hole are coaxially arranged, when the catheter penetrates, the inner wall of the first round hole 201 contacts with the side surface of the catheter, the cover body 2 comprises a disc, a ring pipe and a side ring 202, the disc is connected to the upper surface of the ring pipe, the disc and the ring pipe are coaxially arranged, the disc, the ring pipe and the side ring 202 are integrally formed, the ring pipe is arranged at the edge of the lower surface of the disc, the outer diameter of the ring pipe is the same as the diameter of the disc, the side plate is formed on the side surface of the bottom of the disc, the side plate is a circular ring plate, the outer diameter of the side plate is larger than the diameter of the disc, an annular arc cavity 203 is formed on the lower surface of the disc, and the inner bottom wall of the disc is higher than the lower surface of the ring pipe;
specifically, the side plate of the cover body 2 is lapped on the upper surface of the outer sleeve 1, a plurality of round holes are formed in the side plate at equal intervals, and a plurality of bolt holes are formed in the upper surface of the outer sleeve 1 at equal intervals, so that the cover body 2 can be connected with the outer sleeve 1 through bolts 204;
the cover body 2 can be placed on the outer sleeve 1, the ring canal of the cover body 2 is inserted into the inner wall of the outer sleeve 1, the lower surface of the ring canal is put on the bearing plate 103 of the inner wall of the outer sleeve 1, the cover body 2 is rotated to adjust the position of the cover body 2, the round holes on the side plates correspond to the bolt holes on the upper surface of the outer sleeve 1, then the bolts 204 are sequentially inserted into the round holes, the bolts 204 are screwed by using a tool, and the bolts 204 are gradually screwed into the bolt holes on the upper surface of the outer sleeve 1, so that the cover body 2 is assembled.
An inner tube 102 is arranged in the outer sleeve 1, the inner tube 102 and the cylindrical cavity are coaxially arranged, the diameter of the inner tube 102 is larger than that of the first round hole 201, so that a catheter can smoothly pass through the inner tube 102, a cavity is formed between the upper surface of the inner tube 102 and the inner bottom wall of the disc, and the cutting head 6 is placed in the cavity, so that the cutting head 6 is limited between the inner bottom wall of the disc and the upper surface of the inner tube 102;
an annular cavity is formed between the inner pipe 102 and the inner wall of the outer sleeve 1, the pushing mechanism 7 is slidably arranged in the annular cavity, and the pushing mechanism 7 moves upwards to push the cutting head 6 to move inwards;
the wheel body 205 is rotatably installed in the first round hole 201 of the cover body 2, and the wheel body 205 is coaxially provided with a rotation speed sensor and an alarm, and the rotation speed sensor and the alarm are electrically connected with the controller 4. The rotation speed sensor is used for detecting the rotation speed of the wheel body 205, and the alarm is used for prompting medical staff.
When the catheter is inserted into the first round hole 201, the side surface of the wheel body 205 is contacted with the side surface of the catheter, and the wheel body 205 rotates along with the insertion of the catheter, so that the rotating speed sensor is driven to rotate along with the catheter, the rotating speed sensor measures the rotating speed of the wheel body 205 and sends a signal to the controller 4, and the circumference of the wheel body 205 is fixed, so that the rolling distance of the wheel body 205 along the catheter can be calculated through the rotating times of the wheel body 205, the displacement of the positioning cutting device is calculated, and the length of the catheter is calculated;
when the calculated catheter length reaches a preset length of 5cm, the controller 4 can control the alarm to alarm, the alarm is an audible and visual integrated alarm, and after the medical staff hears the alarm, the standing horse stops. In addition, a display is additionally arranged on the controller 4, and displacement values can be displayed in real time through the display.
As a specific embodiment, the cutting head 6 comprises eight cutting blocks, the eight cutting blocks form an annular cutting head 6, blades horizontally arranged are arranged on the inner side face of each cutting block, conical surfaces are formed on the outer side face of each cutting block, specifically, when the cutting edge faces of each blade are spliced together, a round hole is formed, the diameter of the round hole is smaller than that of a catheter, when the catheter body 701 moves upwards, the outer side face of the taper tube 703 simultaneously props against the conical surfaces of the cutting blocks so as to simultaneously push the cutting blocks to move towards the axis of the outer sleeve 1, and accordingly the eight blades are gradually close and cut off the catheter. In particular, dicing can be seen as equally dividing a ring into eight pieces, as can the blades.
Specifically, in the initial state, gaps exist between the cut pieces, gaps between adjacent cut pieces are the same, and along with the cut pieces moving towards the axis of the outer sleeve 1 at the same time, the gaps between the cut pieces gradually eliminate until the cut pieces are spliced to be annular, so that eight blades are spliced to be annular, and the guide pipe is cut.
It should be noted that, the upper surface of each block of the cutting block is provided with a convex strip, the lower surface of the disc is provided with a groove matched with the convex strip, the convex strip slides in the groove to play a role in limiting the cutting block, and specifically, the length direction of the groove is the same as the moving direction of each block of the cutting block.
Optionally, the cutting head 6 includes six cutting blocks, the six cutting blocks form annular cutting head 6, a blade is mounted on the inner side surface of each cutting block, six blades are totally mounted on the inner side surface of each cutting block, the cutting blocks can be seen to equally divide a complete annular plate into six blocks, and each of the six blocks is identical to each other, so that the blades are identical to each other.
As a specific embodiment, as shown in fig. 4 and 10, the pushing mechanism 7 includes a tube body 701, the inner wall of the tube body 701 is provided with a taper tube 703, the diameter of the upper end opening of the taper tube 703 is larger than the diameter of the lower end opening, the upper surface of the taper tube 703 is flush with the upper surface of the tube body 701, a limiting plate 705 is arranged at the position, close to the bottom, of the outer side surface of the tube body 701, the limiting plate 705 is a ring plate, and the outer diameter of the limiting plate 705 is larger than the outer diameter of the tube body 701, namely, the limiting plate 705 protrudes out of the tube body 701;
two threaded holes are symmetrically formed in the lower surface of the pipe body 701, external threads are formed in one ends of the two rod bodies 8, one ends of the rod bodies 8 can be screwed into the threaded holes in the pipe body 701, annular plates 9 are connected to the lower ends of the two rod bodies 8, and the diameter of round holes of the annular plates 9 is larger than that of a guide pipe so that the guide pipe can pass through.
According to a specific embodiment, as shown in fig. 4 and 9, the outer tube 101 is provided on the outer sleeve 1, the outer tube 101 is coaxially provided with the inner tube 102, the lower surface of the outer tube 101 is connected to the inner bottom wall of the outer sleeve 1, and the diameter of the outer tube 101 is larger than that of the inner tube 102, but the inner tube 102 is higher than that of the outer tube 101;
a first annular cavity is formed between the inner wall of the outer tube 101 and the outer side surface of the inner tube 102, a second annular cavity is formed between the outer side surface of the outer tube 101 and the inner wall of the outer sleeve 1, a tube body 701 is arranged in the second annular cavity, a taper tube 703 stretches into the first annular cavity, the tail end of the taper tube 703 contacts with the outer side surface of the inner tube 102, a notch cavity 704 is formed at the joint of the tube body 701 and the taper tube 703, and the outer tube 101 is arranged in the notch cavity 704.
According to a specific embodiment, the inner wall of the outer sleeve 1 is connected with the bearing plate 103, the bearing plate 103 is annular, the bearing plate 103 mainly plays two roles, the cover 2 is supported by the first supporting part, the lower surface in the cover 2 is lapped on the bearing plate 103, and the second limiting pushing structure is limited in moving distance, because when the pipe 701 moves upwards, the bearing plate 103 can block the limiting plate 705 on the pipe 701, so when the upper surface of the limiting plate 705 is attached to the lower surface of the bearing plate 103, the pipe 701 can not move upwards continuously, and the pipe 701 at the moment just moves to a limit value, so that a plurality of cut pieces are just spliced to form a complete annular block.
In addition, a step surface is formed on the inner wall of the jacket 1 near the bottom, the step surface is annular, the bearing plate 103 is located above the step surface, the limiting plate 705 slides between the step surface and the bearing plate 103, the step surface plays a role in supporting the limiting plate 705 and the tube body 701, that is, in a natural state, the lower surface of the limiting plate 705 is lapped on the step surface.
The thickness of the stepped surface is the same as the thickness of the carrier plate 103, and the inner side surface of the carrier plate 103 and the side surface of the stepped surface simultaneously contact the outer side surface of the pipe 701 when the pipe 701 moves.
Optionally, an elastic element is connected to the outer side surface of each cut block, the other end of the elastic element is connected to the inner wall of the cover body 2, the length direction of the elastic element is the same as the moving direction of the cut blocks, due to the effect of the bearing plate 103, when the pipe body 701 moves to the limit value, a certain gap is formed between the upper surface of the pipe body 701 and the elastic element, the elastic element is used for helping the quick reset of the cut blocks, after the pipe is cut off, the pipe body 701 is pulled back, the cut blocks are pulled to move outwards while the elastic element is restored, and the specifications of the eight elastic elements are the same, so that the eight cut blocks can be ensured to move to the initial position simultaneously.
According to a specific embodiment, as shown in fig. 4 and 5, two grooves are formed on the upper surface of the cover 2, the two grooves are symmetrically disposed about the first circular hole 201, one groove is on the left side, the other groove is on the right side, the groove is communicated with the first circular hole 201, a rotation shaft is rotatably mounted in the groove, the wheel body 205 is fixedly connected to the rotation shaft, the wheel body 205 is coaxially disposed with the rotation shaft, the side surface of the wheel body 205 protrudes slightly from the groove and enters into the first circular hole 201, so that when the catheter is inserted into the first circular hole 201, the two wheel bodies 205 are simultaneously contacted with the catheter, the two wheel bodies 205 are simultaneously rotated along with the insertion of the catheter, a rotation speed sensor is mounted on the rotation shaft, the rotation speed of the rotation shaft is measured by the rotation speed sensor, and the corresponding displacement can be obtained by calculating the rotation times of the wheel body 205 and converting the rotation times due to the fixed circumference of the wheel body 205.
In addition, the upper surface at lid 2 has seted up the mounting hole, installs first power in the mounting hole, and first power is supplied power for two rotation speed sensor and alarm, still articulates at the upper surface of mounting hole has flip 206, and the other end of flip 206 is connected through the buckle spare between lid 2.
According to a specific embodiment, the polishing mechanism 5 is provided to polish burrs on the cutting surface, considering that a small amount of burrs may be generated on the cutting surface during cutting, which affects the sealing property of the guide pipe and the metal handle of the extension pipe;
as shown in fig. 4, a bottom shell 3 is connected to the lower surface of the outer sleeve 1, the bottom shell 3 and the outer sleeve 1 are fixed by a plurality of screws, a protection cavity is formed in the bottom shell 3, a second round hole 301 is formed in the lower surface of the bottom shell 3, the second round hole 301 is communicated with the protection cavity, the second round hole 301 and a third round hole are coaxially arranged, the diameter of the second round hole 301 is larger than that of a guide pipe, a polishing mechanism 5 is mounted on the lower surface of the outer sleeve 1, and the polishing mechanism 5 is covered in the bottom shell 3 to play a role in protecting the polishing mechanism 5.
Specifically, as shown in fig. 10, the polishing mechanism 5 includes a first rotation shaft, a second rotation shaft, a first gear 501, a second gear 505, a fixed lever 502, a polishing wheel 504, a first motor 503, and a second motor 506;
the first rotating shaft is rotatably mounted on the lower surface of the outer sleeve 1, a first gear 501 is arranged on the first rotating shaft, a second motor 506 is fixed on the lower surface of the outer sleeve 1, a second rotating shaft is arranged at the output end of the second motor 506, a second gear 505 is arranged on the second rotating shaft, the second gear 505 is meshed with the first gear 501, a fixed rod 502 is fixedly connected to the first rotating shaft, a grinding wheel 504 is rotatably connected to the upper surface of one end of the fixed rod 502, a first motor 503 is mounted on the lower surface of one end of the fixed rod 502, the output end of the first motor 503 is connected to the grinding wheel 504, and both the first motor 503 and the second motor 506 are electrically connected with the controller 4;
it should be noted that, the lower surface of the outer sleeve 1 is further provided with a stop 507, the rotation angle of the fixing rod 502 is limited by the stop 507, specifically, under normal conditions, the grinding wheel 504 is far away from the third round hole on the lower surface of the outer sleeve 1, when grinding is required, the controller 4 controls the second motor 506 to work, the second motor 506 drives the second gear 505 to rotate, and then drives the first gear 501 and the first rotating shaft to rotate, finally drives the fixing rod 502 and the grinding wheel 504 to rotate around the first rotating shaft, when the grinding wheel 504 just rotates to the third round hole, the grinding wheel 504 at this time is coaxial with the third round hole, and because of the limiting effect of the stop 507, the fixing rod 502 cannot continue to rotate, the second motor 506 stops working, then the controller 4 starts the first motor 503 to drive the grinding wheel 504 to rotate, the notch surface of the catheter is ground, after grinding is completed, the first motor 503 is turned off, and the second motor 506 is reversely rotated, and the grinding wheel 504 is driven to resume.
Preferably, a pressure sensor can be additionally arranged on the surface of the stop block 507 facing the fixed rod 502, and when the fixed rod 502 just acts on the pressure sensor, the controller 4 receiving the signal of the pressure sensor immediately controls the second motor 506 to stop, so that the second motor 506 and two gears are protected.
Optionally, a second power source 10 is mounted on the lower surface of the casing 1, and the second power source 10 is used to supply power to the first motor 503, the second motor 506 and the controller 4.
The procedure for measuring the remaining length of the catheter using the PICC catheter positioning and cutting device is as follows:
after the cannula sheath is removed, the catheter is inserted into the PICC catheter positioning and cutting device, the catheter penetrates through the annular plate 9 from the first round hole 201 on the cover body 2, then the device is pushed along the catheter until the device is close to the puncture part, then the controller 4 is started, the rotating speed sensor is in a zeroing state, then the device is slowly pulled back, the two wheel bodies 205 rotate simultaneously, the rotating speed sensor conveys the rotating speed value into the controller 4 in real time, the real-time displacement can be calculated through the rotation times, the controller 4 gives an alarm when the preset length of the catheter which is vertical to be measured in displacement reaches the preset length of 5cm through the display, the operator stops the pulling in the moment, the position is about 5cm, and the preset length can be set at 5.1cm when the value is set by considering that the position of the wheel bodies 205 is about 1cm from the blade.
Using this PICC pipe location cutting device, the principle and the step of cutting off the pipe are as follows: after the reserved length is measured, an operator pushes the ring plate 9 towards the cover body 2, the ring plate 9 drives the rod body 8 and the pipe body 701 to move towards the cover body 2, when the taper pipe 703 is contacted with the cut blocks from the beginning, a plurality of cut blocks simultaneously start to move inwards, along with the subsequent upward movement of the taper pipe 703, the outer side surface of the taper pipe 703 simultaneously pushes against the conical surface of the cut blocks so as to simultaneously push the cut blocks to move towards the axis of the jacket 1, the limit position is gradually reached, thereby eight blades gradually close and cut off the guide pipe, when the limit position is reached, the upper surface of the limiting plate 705 is just attached to the lower surface of the bearing plate 103, after the guide pipe is cut off, the lower pull ring plate 9 drives the rod body 8 and the pipe body 701 to move downwards until the lower surface of the limiting plate 705 is attached to the step surface of the pipe body 701, and the taper pipe 703 is separated from the cut blocks, and the taper pipe 703 does not act on the cut blocks any more due to the tensile force of the elastic piece, and the cut blocks simultaneously recover to the original position.
The principle and the steps of polishing the incision surface by using the PICC catheter positioning and cutting device are as follows:
after the catheter is cut, the cut catheter is pulled out, the controller 4 is started, the controller 4 controls the second motor 506 to work, the second motor 506 drives the second gear 505 to rotate, and then drives the first gear 501 and the first rotating shaft to rotate, finally, the fixing rod 502 and the grinding wheel 504 are driven to rotate around the first rotating shaft, when the grinding wheel 504 just rotates to the third round hole, the grinding wheel 504 at the moment is coaxial with the third round hole, and because of the limit effect of the stop block 507, the fixing rod 502 cannot continue to rotate, the second motor 506 pauses to work, then continues to push the device towards the puncture part until the incision surface of the catheter is contacted with the upper surface of the grinding wheel 504, at the moment, an operator lightly applies force to the catheter, so that the incision surface of the catheter is always clung to the grinding wheel 504, then, the first motor 503 is started to drive the grinding wheel 504 to rotate by the controller 4, the incision surface of the catheter is polished, after the grinding is completed, the first motor 503 is closed, the second motor 506 is driven to reversely rotate, the grinding wheel 504 is restored to the original position, and finally, the catheter is pulled out.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

  1. PICC pipe positioning cutting device, characterized by, including overcoat (1), lid (2), crop (6), pushing mechanism (7), at least one wheel body (205) and controller (4);
    a cylindrical cavity is formed in the outer sleeve (1), one end of the outer sleeve (1) is in an opening shape, the other end of the outer sleeve is in a sealing shape, and a third round hole is formed in the center of the sealing end of the outer sleeve (1);
    the cover body (2) is covered on the opening end of the outer sleeve (1), a first round hole (201) is formed in the upper surface of the cover body (2), the first round hole (201) and the third round hole are coaxially arranged, the cover body (2) is provided with an inner bottom wall and an outer bottom wall, and the inner bottom wall is higher than the outer bottom wall;
    an inner tube (102) is arranged in the outer sleeve (1), the inner tube (102) and the cylindrical cavity are coaxially arranged, a cavity is formed between the upper surface of the inner tube (102) and the inner bottom wall, and the cutting head (6) is placed in the cavity;
    an annular cavity is formed between the inner pipe (102) and the inner wall of the outer sleeve (1), the pushing mechanism (7) is slidably arranged in the annular cavity, and the pushing mechanism (7) moves upwards to push the cutting head (6) to move inwards;
    the rotary type electric bicycle is characterized in that the first round hole (201) of the cover body (2) is rotationally provided with a wheel body (205), the wheel body (205) is coaxially provided with a rotary speed sensor and an alarm, and the rotary speed sensor and the alarm are electrically connected with the controller (4).
  2. 2. The PICC catheter positioning and cutting device according to claim 1, further comprising a grinding mechanism (5), wherein the grinding mechanism (5) is mounted at the sealing end of the outer sleeve (1), and the cutting surface of the catheter is ground by the grinding mechanism (5).
  3. 3. The PICC catheter positioning and cutting device according to claim 2, wherein the cutting head (6) comprises a plurality of cut pieces, the plurality of cut pieces form an annular cutting head (6), a horizontally arranged blade is arranged on the inner side surface of each cut piece, a conical surface is formed on the outer side surface of each cut piece, a through hole penetrating through the cutting head (6) is formed on the cutting head (6), and the through hole and the cutting head (6) are coaxially arranged;
    the pushing mechanism (7) comprises a pipe body (701), a taper pipe (703) is arranged on the inner wall of the pipe body (701), a gap is formed between the cutting head (6) and the inner wall of the cover body (2), and the pipe body (701) is pushed to drive the taper pipe (703) to enter the gap;
    an elastic piece is connected to the outer side face of each block, and the other end of the elastic piece is connected to the inner wall of the cover body (2).
  4. 4. The PICC catheter positioning and cutting device according to claim 3, wherein an outer tube (101) is provided on the outer sheath (1), the outer tube (101) is coaxially provided with the inner tube (102), and the diameter of the outer tube (101) is larger than the diameter of the inner tube (102);
    -said inner tube (102) is higher than said outer tube (101);
    a first annular cavity is formed between the inner wall of the outer tube (101) and the outer side surface of the inner tube (102), a second annular cavity is formed between the outer tube (101) and the inner wall of the outer sleeve (1), the tube body (701) is arranged in the second annular cavity, the taper tube (703) is arranged in the first annular cavity, a junction of the tube body (701) and the taper tube (703) is formed with a notch cavity (704), and the outer tube (101) is arranged in the notch cavity (704).
  5. 5. The PICC catheter positioning and cutting device according to claim 4, wherein the pushing mechanism (7) further comprises at least one rod body (8), the rod body (8) is connected to the lower surface of the tube body (701), the rod body (8) passes through the lower surface of the jacket (1), and a ring plate is provided on the lower surface of the rod body (8).
  6. 6. The PICC catheter positioning and cutting device according to claim 5, wherein the cover (2) includes a disc, a collar and a side ring (202), the disc being attached to an upper surface of the collar, an outer diameter of the collar being the same as a diameter of the disc, the first round hole (201) being formed in the disc;
    the side ring (202) is connected to the side face of the disc, the inner diameter of the side ring (202) is the same as the diameter of the disc, and an annular arc cavity (203) is formed in the lower surface of the disc.
  7. 7. The PICC catheter positioning and cutting device according to claim 1, wherein the upper surface of the cover body (2) is provided with at least one groove, the groove is communicated with the first round hole (201), a rotating shaft is rotatably mounted in the groove, the wheel body (205) is connected to the rotating shaft, the wheel body (205) and the rotating shaft are coaxially arranged, and the rotating speed sensor is mounted on the rotating shaft.
  8. 8. The PICC catheter positioning and cutting device according to claim 4, wherein the inner wall of the outer sleeve (1) is connected with a bearing plate (103), the bearing plate (103) is annular, a step surface is formed on the inner wall of the outer sleeve (1) near the bottom, the bearing plate (103) is located above the step surface, a limiting plate (705) is arranged on the outer side surface of the tube body (701) near the bottom, the limiting plate (705) is a ring plate, and the limiting plate (705) is limited between the step surface and the bearing plate (103).
  9. 9. The PICC catheter positioning and cutting device according to claim 2, wherein the lower surface of the outer sleeve (1) is connected with a bottom shell (3), a protection cavity is formed in the bottom shell (3), a second round hole (301) is formed in the lower surface of the bottom shell (3), the second round hole (301) is communicated with the protection cavity, the second round hole (301) and the third round hole are coaxially arranged, and the polishing mechanism (5) is covered in the bottom shell (3);
    the polishing mechanism (5) comprises a first rotating shaft, a second rotating shaft, a first gear (501), a second gear (505), a fixed rod (502), a polishing wheel (504), a first motor (503) and a second motor (506); the first rotating shaft is rotatably arranged on the lower surface of the outer sleeve (1), a first gear (501) is arranged on the first rotating shaft, a second motor (506) is fixed on the lower surface of the outer sleeve (1), a second rotating shaft is arranged at the output end of the second motor (506), a second gear (505) is arranged on the second rotating shaft, the second gear (505) is meshed with the first gear (501), the fixed rod (502) is fixedly connected to the first rotating shaft, a polishing wheel (504) is rotatably connected to the upper surface of one end of the fixed rod (502), the first motor (503) is arranged on the lower surface of one end of the fixed rod (502), and the output end of the first motor (503) is connected to the polishing wheel (504); a stop block (507) is further arranged on the lower surface of the outer sleeve (1), and the rotation angle of the fixed rod (502) is limited through the stop block (507);
    the first motor (503) and the second motor (506) are electrically connected with the controller (4).
  10. PICC catheter cutting method, characterized in that it uses the PICC catheter positioning cutting device as defined in any one of claims 1-9, and its use steps are as follows:
    s1: after the cannula sheath is removed, inserting the catheter into the PICC catheter positioning and cutting device, penetrating the catheter from a first round hole (201) on the cover body (2) to penetrate out of the annular plate (9), and pushing the PICC catheter positioning and cutting device along the catheter until the PICC catheter positioning and cutting device is close to the puncture part;
    s2: starting a rotation speed sensor through a controller (4), then pulling back the PICC catheter positioning and cutting device, continuously rotating a wheel body (205) against a catheter, sending a signal value to the controller (4) by the rotation speed sensor in real time, converting the rotation speed value into a displacement by the controller (4) and displaying the displacement in a display screen of the controller (4) in real time, controlling an alarm to give an alarm by the controller (4) when the moving distance reaches 5cm, and stopping pushing the PICC catheter positioning and cutting device by an operator;
    s3: pushing the ring plate (9) towards the cover body (2), and returning the ring plate (9) after the guide pipe is cut off by the cutting head (6);
    s4: after the second motor (506) is started through the controller (4), the grinding wheel (504) rotates to a designated position, the controller (4) controls the second motor (506) to stop, the PICC catheter positioning and cutting device is pushed continuously along the catheter until the tail end of the catheter is contacted with the grinding wheel (504), then the controller (4) controls the first motor (503) to start for grinding, after the belt is opened completely, the controller (4) controls the second motor (506) to continuously work so that the grinding wheel (504) is restored to the original position, and then the PICC catheter positioning and cutting device is pulled out.
CN202310595342.1A 2023-05-25 2023-05-25 PICC catheter positioning and cutting device and PICC catheter cutting method Active CN116277173B (en)

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