CN115607454B - Electromagnetic navigation type nasal feeding catheter positioner with quick insertion structure - Google Patents
Electromagnetic navigation type nasal feeding catheter positioner with quick insertion structure Download PDFInfo
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- CN115607454B CN115607454B CN202211536535.1A CN202211536535A CN115607454B CN 115607454 B CN115607454 B CN 115607454B CN 202211536535 A CN202211536535 A CN 202211536535A CN 115607454 B CN115607454 B CN 115607454B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
- A61B5/065—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
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Abstract
The invention relates to the technical field of medical instruments, in particular to an electromagnetic navigation type nasal feeding catheter positioner with a quick insertion structure, which aims at solving the problems of accuracy, safety and easiness in use of home care patients, and comprises a guide wire with a tracking sensor, a nasal feeding catheter, a reference scaler with a positioning sensor, a magnetic field generator and a system host, wherein the guide wire with the tracking sensor is connected with the system host, the reference scaler with the positioning sensor is connected with the system host, and the magnetic field generator is connected with the system host.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an electromagnetic navigation type nasal feeding catheter positioner with a quick insertion structure.
Background
The nasal feeding method is that a nasal feeding catheter is manually put into the stomach of a patient through the nose and the throat of the patient and the esophagus or enters the jejunum/small intestine through the pylorus, and then the patient is given medicines or fed. Nasogastric feeding is considered a temporary, non-surgical, medical aid, commonly used in the treatment and diagnosis of patients. Nasal feeding catheter placement is typically performed by specially qualified medical personnel in the treatment of a medical facility.
At present, the clinical medical personnel who carry out the operation of putting the pipe usually adopt blind insertion mode to place the nasal feeding pipe in the patient, and the internal motion trail of putting intraductal feeding tube of pipe in-process at the patient is all invisible with the position. The feeding tube placing finished in a blind insertion mode has extremely high mis-positioning rate, which can cause a series of serious problems. Use of an improperly placed feeding tube can lead to serious complications for the patient, such as pneumonia, peritonitis, bowel perforation, and pneumothorax, and in more serious cases can threaten the life safety of the patient. Thus, the position of the feeding tube within the patient needs to be determined prior to any medication or feeding to avoid problems due to misplacement of the feeding tube.
Currently, hospitals often include gastric information detection methods, gas injection methods, or X-ray positioning of the location of a feeding tube within a patient. However, these methods have different problems in terms of accuracy, versatility and reliability. Gastric information detection method determines whether the naso-gastric feeding tube reaches the stomach of a patient by measuring the pH, enzyme content or carbon dioxide level in the stomach of the patient. The method can only be applied to the nasal-gastric feeding tube of a patient, and the drugs or food adopted by the patient in the treatment can influence the correctness and reliability of the detection result. The air injection technique is used for determining the position of a feeding tube by a clinical medical staff listening to the sound of air injected into the feeding tube in a patient through a stethoscope. However, noise in the patient's body can lead to erroneous judgment of the correct location, thereby requiring a high level of clinical experience and operation of the clinical staff. While the method of using X-rays to ensure that the feeding tube is properly positioned in the desired location in the stomach or small intestine is more accurate than the conventional method described above, using this technique typically requires no less than 5X-ray scans to determine the position of the feeding tube. High frequency radiation can have deleterious effects on patients and clinical staff, leading to more serious problems.
Moreover, the use of gastric information detection methods or X-ray techniques typically require equipment to be available in a hospital or clinical setting, and thus cannot be used for patients in home care. Currently, only insufflation can be used by patients in home care to determine the correct placement of a feeding tube.
In view of the problems of accuracy, safety and easiness in use for home care patients in the nasal feeding catheter placement method and technology, there is a need for an electromagnetic navigation type nasal feeding catheter positioner with a fast insertion structure, which has high accuracy, no radiation hazard and is easy to implement and popularize.
Disclosure of Invention
To solve the above technical problems.
The application provides an electromagnetic navigation type nasal feeding catheter positioner with a quick insertion structure, which comprises a guide wire with a tracking sensor, a nasal feeding catheter, a reference scaler with a positioning sensor, a magnetic field generator and a system host;
the guide wire provided with the tracking sensor is connected with the system host;
the guide wire with the tracking sensor is used as a component of the nasal feeding catheter in clinical application and is arranged inside the nasal feeding catheter, and the tracking sensor is arranged at the top end inside the nasal feeding catheter;
the reference calibrator with the positioning sensor is connected with the system host, and the reference calibrator needs to be placed at the xiphoid process part of a patient in clinical application;
the magnetic field generator is connected with the system host, and the magnetic field generator can continuously form a local time division alternating magnetic field in space under the control of the system host.
Preferably, the guide wire comprises a metal wire, and the metal wire has support property, pushing force and torsion control property; and the protective sleeve and the connecting wire are respectively connected with the two ends of the metal wire, the tracking sensor is electrically connected with the connecting wire, the protective sleeve is wrapped outside the metal wire, and the tracking sensor is connected with the system host through the connecting wire.
Preferably, the protection sleeve comprises a main body tube, the main body tube is sleeved outside the metal wire, two ends of the main body tube are fixedly connected with the metal wire and the connecting wire respectively, and a locking sleeve used for fixing the nasal feeding catheter is sleeved outside the main body tube.
Preferably, the locking sleeve comprises a cylinder, a screwing ring and a jaw, the cylinder is sleeved outside the main pipe and fixedly connected with the main pipe, the jaw is hinged outside the cylinder, the screwing ring is sleeved outside the cylinder and in threaded connection with the cylinder, a sleeve ring is sleeved on the screwing ring and rotatably connected with the screwing ring, the sleeve ring is also in sliding connection with the cylinder, and the stressed end of the jaw is in transmission connection with the sleeve ring.
Preferably, the barrel is sleeved outside the main body pipe, the barrel is in threaded connection with the main body pipe, the main body pipe is provided with an elastic column for pushing the barrel, and the pushing direction is consistent with the axial direction of the main body pipe.
Preferably, the diameter of one end of the cylinder body close to the metal wire is smaller than that of the other end of the cylinder body, and the outer wall of the cylinder body is provided with a plurality of rolling bodies.
Preferably, the guide wire further comprises a first air bag, the first air bag is arranged at the end part of the tracking sensor on the metal guide wire, and the first air bag is in a contracted state under a normal state; and a gas supply assembly for delivering gas to the first gas pocket.
Preferably, the air supply assembly comprises a second air bag, the second air bag is arranged in the barrel body and is in an expansion state under a normal state, and the first air bag is connected with the second air bag through an air pipe; and the extrusion ring is arranged on the barrel in a sliding manner and is connected with the lantern ring in a transmission manner.
Preferably, the tracking sensor comprises a coil frame and an induction coil, and the induction coil is fixedly wound on the outer surface of the coil frame in a close winding mode.
Preferably, the reference calibrator includes a positioning sensor, a calibrator housing, a cable and a connector, the positioning sensor is installed inside the calibrator housing, the positioning sensor is connected to the connector through the cable, and the reference calibrator equipped with the positioning sensor is connected to the system host through the connector.
Compared with the prior art, the invention has the beneficial effects that:
the nasogastric catheter positioning of the present application has several advantages over conventional systems that detect the position of the nasogastric catheter in the patient's body, and is more accurate than the technique by using a pH, gastric enzyme, air or C02 detector, is secured to the patient's xiphoid process by reference to a calibrator, and then the nasogastric catheter fitted with a tracking sensor is inserted into the patient's body, a magnetic field generator constructs a sensing region during the nasogastric catheter placement, and the process of operating human-computer interaction software in the system host to calculate the real-time position of the tracking sensor of the guide wire in the nasogastric catheter can determine the position of the nasogastric catheter in real time, not just after the insertion is completed, and furthermore, the present technique does not rely on radiographic methods to detect the position of the feeding catheter, and is more easily used by medical personnel or by medically trained patients' families and friends, and thus these techniques can be used in medical institutions or home care wards.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a top view of a reference scaler of the present invention;
FIG. 3 is a front view of the tracking sensor of the present invention;
FIG. 4 is a schematic structural diagram of a system host according to the present invention;
FIG. 5 is a schematic perspective view of a nasogastric catheter, tracking sensor and guidewire of the present invention;
FIG. 6 is a top view of the tracking sensor and guidewire of the present invention;
FIG. 7 is a top view of the nasogastric catheter, tracking sensor and guide wire of the present invention in perspective;
FIG. 8 is a side view of a nasogastric catheter, tracking sensor and guidewire of the present invention;
FIG. 9 isbase:Sub>A sectional view taken along line A-A of FIG. 8;
FIG. 10 is a first perspective view of the protective cover of the present invention;
FIG. 11 is a second perspective view of the protective cover of the present invention;
FIG. 12 is a front view of the protective sheath of the present invention;
FIG. 13 is a side view of a protective sheath of the present invention;
FIG. 14 is a sectional view taken along line B-B of FIG. 13;
FIG. 15 is a schematic perspective view of FIG. 14;
FIG. 16 is an enlarged view at C of FIG. 15;
FIG. 17 is a first exploded perspective view of the protective cover of the present invention;
fig. 18 is a schematic perspective exploded view of the protective cover of the present invention.
The reference numbers in the figures are:
1-a tracking sensor; 11-a coil former; 12-an induction coil;
2-guide wire; 21-a metal wire; 22-a protective sleeve; 221-a main body tube; 2211-bullet column; 222-a locking ferrule; 2221-barrel; 22211-rolling elements; 2222-a screw ring; 22221-collar; 2223-jaws; 22231-splint; 22232-crank; 22233-linkage; 23-connecting wires; 24-a first balloon; 25-a gas supply assembly; 251-a second balloon; 2511-a cover; 2512-a guide plate; 2513-a bearing; 252-trachea; 253-an extrusion ring;
3-a reference scaler; 31-a sealer housing;
4-a magnetic field generator;
5-system host computer;
6-nasal feeding catheter.
Detailed Description
The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in fig. 1 to 7, the following preferred technical solutions are provided:
an electromagnetic navigation type nasal feeding catheter positioner with a quick insertion structure comprises a guide wire 2 provided with a tracking sensor 1, a nasal feeding catheter 6, a reference scaler 3 provided with the tracking sensor 1, a magnetic field generator 4 and a system host 5.
The guide wire 2 provided with the tracking sensor 1 comprises a metal guide wire 21, the tracking sensor 1, a protective sleeve 22 and a connecting wire 23, wherein the metal guide wire 21 is specifically a twisted stainless steel wire but is not limited thereto, a polytetrafluoroethylene coating is attached to the surface of the twisted stainless steel wire but is not limited thereto, the tracking sensor 1 is installed at the top end of a stainless steel twisted pair, the tracking sensor 1 is connected with the connecting wire 23 through a twisted pair enameled wire wound on the twisted pair stainless steel wire, the tail end of the stainless steel wire is fixedly connected with the connecting wire 23, and the protective sleeve 22 is wrapped outside the twisted pair stainless steel wire wound with the twisted pair enameled wire; the length of the guide wire 2 provided with the tracking sensor 1 is 2.4m, and the guide wire 2 provided with the tracking sensor 1 is connected with the system host 5 through a connecting wire 23;
the twisted pair enameled wire is made of copper twisted pair enameled wire, but is not limited thereto.
In some embodiments, the tracking sensor 1 is a micro-coil sensor that is connected to the system host 5 by a connector on the guide wire 2.
Tracking sensor 1 includes coil skeleton 11 and induction coil 12, and induction coil 12 adopts the fixed winding of close winding mode on 11 surfaces of coil skeleton, and is concrete, and induction coil 12 adopts the close winding mode fixed, has improved single-axis magnetic field induction coil 12 measurement sensitivity, under single-axis magnetic field induction coil 12 position determination requirement, promotes single-point magnetic field measurement accuracy in the space.
The guide wire 2 with the tracking sensor 1 is used as a component of a nasal feeding catheter 6 in clinical application and is arranged inside the nasal feeding catheter 6, and the tracking sensor 1 is arranged at the top end inside the nasal feeding catheter 6.
The reference scaler 3 includes a positioning sensor, a scaler housing 31, a cable and a connector; the positioning sensor is connected with the connector through a cable; the reference calibrator 3 provided with the positioning sensor is connected with a system host 5 through a connector;
specifically, the positioning sensor consists of 2 tracking sensors 1, and the 2 tracking sensors 1 are arranged in a shell of a reference calibrator 3 in a mutually vertical direction;
more specifically, the scaler shell 31 adopts a reuleaux triangle structure form, the reuleaux triangle structure form is similar to the human rib bone xiphoid process position, and the reference scaler 3 has definite directivity after being assembled with the cable, so that the reference scaler 3 can be quickly, accurately and stably placed at the xiphoid process position of a patient, and the scaler shell accords with the requirement of ergonomic design and is easy to be clinically applied.
The magnetic field generator 4 is connected with the system host 5, and the magnetic field generator 4 can continuously form a local time division alternating magnetic field in space under the control of the system host 5;
specifically, the magnetic field generator 4 is connected to the system host 5 and generates a magnetic field signal, for example, the magnetic field generator 4 can generate a time-varying local alternating magnetic field. The magnetic field generator 4 is arranged at one side of the body of the patient and generates a magnetic field, the magnetic field covers the part of the patient from the lower part of the nasal cavity to the upper part of the abdomen of the trunk to construct a sensing area, the xiphoid part of the body of the patient is provided with a reference scaler 3, and a nasal feeding catheter 6 assembled with the guide wire 2 of the tracking sensor 1 is inserted into the body of the patient.
The system host 5 comprises a host shell, a touchable man-machine interaction display screen, a host/power module, an electromagnetic navigation module and a lithium battery pack, wherein the touchable man-machine interaction display screen, the host/power module, the electromagnetic navigation module and the lithium battery pack are arranged in the host shell, and the host shell can be made of plastics or any other suitable non-metallic materials without limitation;
in particular, in some embodiments, the touchable human-computer interaction display may use a capacitive touch display with a size of 13.3 inches and a resolution of 1920 x 1080;
specifically, local time division alternating magnetic field signal is surveyed and is converted into analog voltage signal to tracking sensor 1 in seal wire 2 and the reference scaler 3, and through connector conveying on the host computer casing to electromagnetic navigation module, electromagnetic navigation module is right data are handled the back and will be handled the result and send to host computer power module, host computer power module is in data processing result clinical medical personnel are shown for clinical medical personnel to tangible human-computer interaction display screen, and clinical medical personnel also can directly interact with system's host computer 5 through tangible human-computer interaction display screen.
Specifically, the host/power module includes a power circuit and a host circuit;
the power supply circuit is connected with the host circuit, the external power adapter and the system switch, and generates and outputs driving voltage for driving the host circuit, the electromagnetic navigation module and the touchable man-machine interaction display screen to work under the control of the system switch and the host circuit control signal. Meanwhile, the power circuit is connected with the lithium battery and generates 2 amperes of constant current charging current for the lithium battery;
in some embodiments, the host circuit adopts a core control circuit with RaspberyPicomputeModule 4 as a core and USB drive circuit, serial communication circuit, fan motor drive circuit, data card and data card drive circuit as auxiliary extensions;
specifically, the host circuit realizes the operation of human-computer interaction application software on the basis of a Linux operating system, and simultaneously drives the application software to display on the touchable human-computer interaction display screen in a graphical mode. The Linux operating system and the application software are solidified on the 32GBTF data card, and under the condition that the system host 5 is applied, the data storage space is expanded, the system host 5 is convenient to upgrade, and the efficiency is optimized;
specifically, the lithium battery pack is composed of 12 rechargeable 18650 lithium batteries in a six-series-two-parallel connection mode, and the electric quantity of the lithium battery pack is not lower than 5600mAh, so that power is supplied to a system host 5 under the condition that no external power supply exists;
the system host 5 is integrally arranged, and has the advantages of portability and strong adaptability.
In a particular embodiment, the method for positioning the nasal feeding catheter 6 in the patient comprises the steps of:
the method comprises the following steps: the guide wire 2 of the tracking sensor 1, the tracking sensor 1 is placed on the top of the guide wire 2, and the guide wire 2 is connected with the system host 5 through a connector;
step two: the guide wire 2 provided with the tracking sensor 1 is used as a component of the nasal feeding catheter 6 and is arranged inside the nasal feeding catheter 6, and the tracking sensor 1 is positioned at the top end inside the nasal feeding catheter 6;
step three: providing a reference scaler 3 provided with a tracking sensor 1, wherein the reference scaler 3 is connected with a system host 5 through a connector;
step four: the clinical medical staff fixes the reference scaler 3 on the xiphoid process of the patient, and the cable of the reference scaler 3 extends downwards along the trunk of the patient and towards the lower limb;
step five: a magnetic field generator 4 is arranged on one side of the body of the patient, and the magnetic field generator 4 is connected with a system host 5. For example, a clinical medical staff can vertically place the magnetic field generator 4 at a position parallel to the reference calibrator 3 and at a distance of 45cm to 50cm on one side of the trunk of the patient, and the magnetic field generator 4 constructs a sensing area with the origin of the magnetic field emitter as 600mm multiplied by 500mm in the process of tube placement of the nasal feeding catheter 6;
step six: clinical medical care personnel enter a nasal feeding catheter 6 tube placement monitoring function interface through human-computer interaction software in the control system host 5 and start a tube placement monitoring function;
step seven: the nasogastric catheter 6 fitted with the tracking sensor 1 is then inserted into the patient's body, for example, the nasogastric catheter 6 can be passed through the patient's nose, through the nasal cavity and down through the esophagus into the patient's stomach, or over the stomach and into the small intestine;
step eight: the process that human-computer interaction software is operated in the system host 5 to calculate the real-time position of the tracking sensor 1 of the guide wire 2 in the nasal feeding catheter 6, the track of the icon is displayed by sequentially displaying the position information of the icon moving along with the insertion of the nasal feeding catheter 6 according to the calculation result, and the track is displayed in a two-dimensional or three-dimensional mode in a simulated mode as the shape of the insertion track of the nasal feeding catheter 6;
and step nine, in the process of putting the nasal feeding catheter 6 into the tube, judging whether the movement track of the feeding tube accords with the expectation or not by clinical medical staff according to the shape of the real-time insertion track, and confirming whether the feeding tube reaches the expected position or not after the tube putting is finished.
As shown in fig. 7 to 18, the following preferred technical solutions are provided:
the guide wire 2 comprises a metal wire 21, and the metal wire 21 has support, pushing force and torsion control; and
the tracking sensor comprises a protective sleeve 22 and a connecting wire 23, wherein two ends of a metal wire 21 are respectively connected with a tracking sensor 1 and the connecting wire 23, the tracking sensor 1 is electrically connected with the connecting wire 23, the protective sleeve 22 is wrapped outside the metal wire 21, and the tracking sensor 1 is connected with a system host 5 through the connecting wire 23;
the protection sleeve 22 comprises a main body tube 221, the main body tube 221 is sleeved outside the metal lead 21, two ends of the main body tube are respectively and fixedly connected with the metal lead 21 and the connecting wire 23, and a locking sleeve 222 used for fixing the nasal feeding catheter 6 is sleeved outside the main body tube 221;
the lock clamping sleeve 222 comprises a cylinder 2221, a screwing ring 2222 and clamping jaws 2223, the cylinder 2221 is sleeved outside the main tube 221, the cylinder 2221 is fixedly connected with the main tube 221, the clamping jaws 2223 are symmetrically arranged outside the cylinder 2221, the diameter of one end of the cylinder 2221 close to the metal lead 21 is smaller than that of the other end of the cylinder 2221, and the outer wall of the cylinder 2221 is provided with a plurality of rolling bodies 22211, so that the nasal feeding catheter 6 is sleeved on the cylinder 2221 more smoothly;
specifically, the jaw 2223 includes a clamping plate 22231, a crank 22232 and a connecting rod 22233, the crank 22232 is rotatably mounted on the outer wall of the cylinder 2221, and two ends of the crank 22232 are respectively hinged to the clamping plate 22231 and the connecting rod 22233;
the screwing ring 2222 is sleeved outside the cylinder 2221, the screwing ring 2222 is in threaded connection with the cylinder 2221, the screwing ring 2222 is sleeved with a lantern ring 22221, the lantern ring 22221 is rotatably connected with the screwing ring 2222, the lantern ring 22221 is also in sliding connection with the cylinder 2221, and the stressed end of the connecting rod 22233 on the claw 2223 is in transmission connection with the lantern ring 22221;
the guide wire 2 further comprises a first air bag 24, the first air bag 24 is arranged at the end part of the tracking sensor 1 on the metal lead 21, and the first air bag 24 is in a contracted state under a normal state; and a gas supply assembly 25 for delivering gas to the first gas bag 24;
the air supply assembly 25 comprises a second air bag 251, the second air bag 251 is arranged inside the barrel 2221, the second air bag 251 is in an expansion state under a normal state, and the first air bag 24 is connected with the second air bag 251 through an air pipe 252; and the extrusion ring 253 is arranged on the cylinder 2221 in a sliding manner, and the extrusion ring 253 is in transmission connection with the lantern ring 22221.
Specifically, in order to solve the technical problems that the intubation and the extubation processes are affected due to the fact that the guide wire 2 is not tightly connected with the nasal feeding catheter 6, and body fluid enters the nasal feeding catheter 6 during the intubation process to cause pollution of the guide wire 2, the metal wire 21 provided with the tracking sensor 1 is directly inserted into the nasal feeding catheter 6 until the first air bag 24 at the end of the tracking sensor 1 is flush with the opening of the nasal feeding catheter 6, at the moment, the tail of the nasal feeding catheter 6 is sleeved on the outer wall of the barrel 2221, a worker rotates the screwing ring 2222, the screwing ring 2222 drives the stressed end of the connecting rod 22233 in the clamping jaw 2223 and the pressing ring 253 at the same time through the lantern ring 22221 during the moving process, the clamping plates 22231 at the two sides of the barrel 2221 press the nasal feeding catheter 6 on the outer wall of the barrel 2221 at the same time, the pressing ring 253 presses the second air bag 251 to convey the air in the first air bag 24 through the air pipe 252, and the opening of the insertion end of the nasal feeding catheter 6 is blocked by the expanded first air bag 24.
As shown in fig. 7 to 18, the following preferred technical solutions are provided:
the cylinder 2221 is sleeved outside the main body pipe 221, the cylinder 2221 is in threaded connection with the main body pipe 221, the main body pipe 221 is provided with a limiting plate for limiting the moving range of the cylinder 2221, the limiting plates are respectively positioned at two ends of the cylinder 2221, the main body pipe 221 is provided with an elastic column 2211 for pushing the cylinder 2221, the elastic column 2211 is provided with a limiting plate at one end close to the metal wire 21, and the pushing direction is axially consistent with that of the main body pipe 221;
the elastic column 2211 is specifically used for avoiding the loosening and displacement of the cylinder 2221, and the anti-loosening principle of the elastic column 2211 is that the cylinder 2221 is pushed by continuous elastic force, so that a friction force is continuously kept by a threaded connection pair to generate a resisting moment, and the cylinder 2221 is prevented from loosening;
the second air bag 251 is externally provided with a covering element 2511, the covering element 2511 is rotatably connected with the cylinder 2221 through a bearing 2513, the covering element 2511 is further connected with the main body pipe 221 in a sliding mode through a guide plate 2512, the extrusion ring 253 is elastically connected with the cylinder 2221 through an elastic rod, and the extrusion ring 253 is far away from the second air bag 251 in an unstressed state.
Specifically, in order to solve the technical problem that the lengths of the nasal feeding catheters 6 are different, when the lengths of the nasal feeding catheters 6 are different, the problem that the positions of the nasal feeding catheters 6 fixed by the locking sleeve 222 are staggered, the change of the clamping position is controlled by the threaded connection of the cylinder 2221 and the main tube 221, in order to avoid the influence of the movable of the cylinder 2221 on the second air bag 251, the relative positions of the second air bag 251 and the cylinder 2221 are not changed by the matching of the cladding piece 2511, the guide plate 2512 and the bearing 2513, and the winding phenomenon of the air tube 252 is avoided.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. An electromagnetic navigation type nasal feeding catheter positioner with a quick insertion structure is characterized by comprising a guide wire (2) of a tracking sensor (1), a nasal feeding catheter (6), a reference calibrator (3) provided with a positioning sensor, a magnetic field generator (4) and a system host (5);
the guide wire (2) provided with the tracking sensor (1) is connected with a system host (5);
the guide wire (2) provided with the tracking sensor (1) is used as a component of the nasal feeding catheter (6) to be placed inside the nasal feeding catheter (6) in clinical application, and the tracking sensor (1) is placed at the top end inside the nasal feeding catheter (6);
the reference calibrator (3) provided with the positioning sensor is connected with the system host (5), and the reference calibrator (3) needs to be placed at the xiphoid process part of a patient in clinical application;
the magnetic field generator (4) is connected with the system host (5), and the magnetic field generator (4) can continuously form a local time division alternating magnetic field in space under the control of the system host (5);
the guide wire (2) comprises a metal wire (21), the metal wire (21) has support, pushing force and torsion control, a protective sleeve (22) and a connecting wire (23), and two ends of the metal wire (21) are respectively connected with the tracking sensor (1) and the connecting wire (23);
the protective sleeve (22) comprises a main body tube (221), the main body tube (221) is sleeved outside the metal lead (21), and a locking sleeve (222) used for fixing the nasal feeding guide tube (6) is sleeved outside the main body tube (221);
the lock clamping sleeve (222) comprises a cylinder body (2221), a screwing ring (2222) and a clamping jaw (2223), the cylinder body (2221) is sleeved outside the main body pipe (221), the cylinder body (2221) is in threaded connection with the main body pipe (221), an elastic column (2211) used for pushing the cylinder body (2221) is arranged on the main body pipe (221), the pushing direction is axially consistent with that of the main body pipe (221), the clamping jaw (2223) is hinged to the outside of the cylinder body (2221), and the screwing ring (2222) is sleeved outside the cylinder body (2221);
the diameter of one end, close to the metal lead (21), of the cylinder (2221) is smaller than that of the other end of the cylinder, and a plurality of rolling bodies (22211) are arranged on the outer wall of the cylinder (2221);
the guide wire (2) also comprises a first air bag (24), the first air bag (24) is arranged at the end part of the tracking sensor (1) on the metal lead (21), and the first air bag (24) is in a contracted state under a normal state; and a gas supply assembly (25) for delivering gas to the first gas pocket (24);
the air supply assembly (25) comprises a second air bag (251), the second air bag (251) is arranged inside the barrel body (2221), the second air bag (251) is in an expansion state under a normal state, and the first air bag (24) is connected with the second air bag (251) through an air pipe (252); the extrusion ring (253) is arranged on the cylinder body (2221) in a sliding mode, and the extrusion ring (253) is in transmission connection with the lantern ring (22221);
the tracking sensor (1) comprises a coil framework (11) and an induction coil (12), wherein the induction coil (12) is fixedly wound on the outer surface of the coil framework (11) in a close winding mode;
the reference scaler (3) comprises a positioning sensor, a scaler shell (31), a cable and a connector, wherein the positioning sensor is arranged in the scaler shell (31), the positioning sensor is connected with the connector through the cable, and the reference scaler (3) provided with the positioning sensor is connected with the system host (5) through the connector.
2. The electromagnetic navigation type nasal feeding catheter positioner with the quick insertion structure according to claim 1, wherein the tracking sensor (1) is electrically connected with a connecting wire (23), a protective sleeve (22) is wrapped outside the metal conducting wire (21), and the tracking sensor (1) is connected with the system host (5) through the connecting wire (23).
3. The electromagnetic navigation type nasal feeding catheter positioner with the quick insertion structure as claimed in claim 2, wherein the two ends of the main body sleeve are fixedly connected with the metal lead (21) and the connecting wire (23), respectively.
4. The electromagnetic navigation type nasogastric catheter positioner with the quick-insertion structure according to claim 3, wherein the screw ring (2222) is in threaded connection with the cylinder body (2221), the screw ring (2222) is sleeved with the lantern ring (22221), the lantern ring (22221) is rotatably connected with the screw ring (2222), the lantern ring (22221) is also in sliding connection with the cylinder body (2221), and the stressed ends of the jaws (2223) are in transmission connection with the lantern ring (22221).
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| CN202211536535.1A CN115607454B (en) | 2022-12-02 | 2022-12-02 | Electromagnetic navigation type nasal feeding catheter positioner with quick insertion structure |
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| CN115607454B true CN115607454B (en) | 2023-04-11 |
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| CN115607454A (en) | 2023-01-17 |
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