Nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function

Abstract

The invention belongs to the technical field of surgical instruments, and discloses a nasal cavity minimally invasive flexible expansion system with a pressure sensing feedback function, the system comprises a main body structure, two sides of the main body structure are movably connected with a first forceps arm and a second forceps arm, the near end of the first forceps arm and the near end of the second forceps arm are provided with a first holding part and a second holding part respectively, the far end of the first forceps arm and the far end of the second forceps arm are provided with a first probing end and a second probing end respectively, and a reset spring for providing elastic bias force is further arranged between the first forceps arm and the second forceps arm; the outer surfaces, making contact with human tissue, of the first probing end and the second probing end are each provided with a flexible buffering pad, and the outer sides of the two flexible buffering pads are each provided with a pressure sensing unit for detecting expansion pressure in real time. The contact pressure is converted into three-color grading display of the circular light-emitting indicator lamp, so that an operator can intuitively judge whether the current expansion force is in a safe or effective interval or not.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical instruments, in particular to a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function. BACKGROUND

[0002] In the clinical diagnosis and treatment and minimally invasive surgery of otolaryngology, the nasal cavity expansion container is a basic instrument for opening the nasal vestibule and nasal threshold, exposing the deep part of the nasal cavity to assist endoscopic examination or instrument operation. The traditional nasal cavity expander is usually integrally manufactured by rigid metal materials such as stainless steel, and the front end probe is driven to open by the doctor manually holding the handle and using the lever principle, so as to physically expand the operation space.

[0003] However, the existing rigid metal expander has significant technical limitations in actual clinical application. Because the inside of the nasal cavity is covered with delicate and richly vascularized mucosa, the high-hardness metal probe directly contacts the soft tissue in the expansion process, which easily causes mechanical scratches and tears of the mucosa due to excessive local contact stress, and further causes intraoperative bleeding or postoperative adhesion. At the same time, the surface of the metal probe is usually smooth, and the friction coefficient is low in the wet nasal cavity environment full of mucus or secretions, so the instrument is easy to slip and displace in the continuous expansion state, which not only forces the doctor to repeatedly adjust the position of the instrument, reduces the operation efficiency, but also may cause secondary injury to the nasal vestibule due to accidental sliding or rebound of the instrument. The traditional mechanical expander completely lacks objective force detection and feedback mechanism, and the expansion force depends entirely on the subjective feeling and clinical experience of the operator. This non-quantitative operation mode has a high safety risk, and too small force will lead to insufficient exposure of the surgical field, affecting the operation accuracy, and too large force may cause nasal threshold tearing, cartilage damage or even fracture, and this operation experience based on subjective feeling is difficult to standardize in medical teaching.

[0004] In view of this, the purpose of the present application is to provide a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function to solve the problems existing in the prior art. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function, which solves the problems of easy damage to the mucosa, easy slipping displacement and lack of objective pressure feedback leading to difficult accurate control of the operation force of the traditional rigid nasal cavity expander in clinical use.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function, comprising a main body structure, first and second jaw arms movably connected on both sides of the main body structure, first and second holding portions respectively arranged at the proximal ends of the first and second jaw arms, first and second insertion ends respectively arranged at the distal ends of the first and second jaw arms, and a reset spring arranged between the first and second jaw arms to provide elastic biasing force.

[0007] The outer surfaces of the first and second insertion ends in contact with human tissues are respectively provided with flexible buffer pads, and the outer sides of the two flexible buffer pads are provided with pressure sensing units for real-time detection of expansion pressure.

[0008] Preferably, one side of the main body structure is provided with a plurality of circular light-emitting indicator lights for emitting light feedback signals according to pressure values.

[0009] Preferably, the first and second insertion ends are both L-shaped curved structures, the material of the flexible buffer pad is medical-grade high-molecular silicone, and the outer surface of the flexible buffer pad is provided with a micro-protrusion anti-slip structure for increasing tissue friction.

[0010] Preferably, the pressure sensing unit is a flexible thin film pressure sensor, which is attached to the outer side of the rigid skeleton of the first or second insertion end, and the sensing surface of the flexible thin film pressure sensor is completely covered by the flexible buffer pad, thereby detecting the deformation signal of the flexible buffer pad under pressure.

[0011] Preferably, the main body structure is further provided with a control circuit module, which is electrically connected with the pressure sensing unit and the circular light-emitting indicator light; the control circuit module receives pressure data collected by the pressure sensing unit and compares the pressure data with a preset safe pressure threshold interval.

[0012] Preferably, the control circuit module is provided with a first pressure threshold value and a second pressure threshold value greater than the first pressure threshold value; when the pressure data is less than the first pressure threshold value, the circular light-emitting indicator light displays a first color; when the pressure data is between the first pressure threshold value and the second pressure threshold value, the circular light-emitting indicator light displays a second color; when the pressure data is greater than the second pressure threshold value, the circular light-emitting indicator light displays a third color.

[0013] Preferably, the reset spring is arranged at the connection between the first jaw arm and the second jaw arm, and the first jaw arm and the second jaw arm are provided with limiting grooves for limiting the displacement of the reset spring, and the reset spring provides a torsional moment for keeping the first insertion end and the second insertion end closed.

[0014] Preferably, the outer surfaces of the first holding part and the second holding part are provided with arc shapes conforming to palm gripping, and a micro battery module for supplying power to the pressure sensing unit is arranged in the inner cavity of the first holding part or the second holding part.

[0015] Preferably, a tactile feedback vibration module arranged in the first holding part or the second holding part is further included, and the tactile feedback vibration module is electrically connected with the control circuit module.

[0016] Preferably, when the control circuit module detects that the pressure data exceeds a preset dangerous pressure threshold, the tactile feedback vibration module is driven to generate a vibration signal.

[0017] The present application provides a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function. 1. The present application converts the hard contact of traditional metal instruments into flexible buffer contact by coating the rigid skeleton of the insertion end with a flexible buffer pad made of medical-grade high-molecular silicone and cooperating with the surface micro-convex anti-slip structure, which effectively disperses the local pressure acting on the nasal mucosa during expansion, reduces the risk of tissue tearing or pressure ischemia, and the anti-slip texture increases the friction coefficient between the probe and the wet mucosa surface, preventing the expander from slipping or moving accidentally during operation.

[0018] 2. The present application can detect and analyze the expansion resistance in real time through the cooperative work of the flexible film pressure sensor and the built-in control circuit module, and the logic judgment based on the first and second pressure thresholds, and the system converts the invisible contact pressure into three-color (first color, second color, third color) graded display of the circular light indicator, enabling the operator to intuitively determine whether the current expansion force is in the safe or effective range, avoiding the loss of control caused by subjective hand feeling in traditional surgery.

[0019] 3. The present application combines the tactile feedback vibration module arranged in the holding part and the dangerous pressure threshold logic in the control circuit, and establishes a second safety mechanism in addition to light feedback, when the expansion pressure exceeds the preset dangerous threshold, the device directly generates mechanical vibration through the handle, ensuring that the operator can perceive the danger warning through hand tactile sensation in real time even if the line of sight is focused on the endoscopic image or the surgical field and cannot observe the indicator light, so as to quickly stop pressing and prevent serious medical accidents.

[0020] The application will be further described below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and other drawings can be obtained by those of ordinary skill in the art without any creative effort based on these drawings.

[0022] Figure 1 is a perspective view of the present application; Figure 2 is a rear view of the present application; Figure 3 is a top view of the present application; Figure 4 is a left view of the present application.

[0023] The drawings show: 100, main body structure; 10, first jaw arm; 11, first holding part; 12, second holding part; 13, flexible buffer pad; 20, second jaw arm; 30, return spring; 40, pressure sensing unit; 50, circular light-emitting indicator lamp. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the present application specification. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0025] Please refer to the drawings in the present application specification Figure 1 - the drawings in the present application specification Figure 4 The embodiments of the present application provide a nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function, which comprises a main body structure 100, first and second jaw arms 10 and 20 movably connected on both sides of the main body structure 100, first and second holding parts 11 and 12 respectively arranged at the proximal ends of the first and second jaw arms 10 and 20, first and second insertion ends respectively arranged at the distal ends of the first and second jaw arms 10 and 20, and a return spring 30 arranged between the first and second jaw arms 10 and 20 to provide elastic biasing force; the outer surfaces of the first and second insertion ends contacting human tissues are respectively provided with flexible buffer pads 13, and the outer sides of the two flexible buffer pads 13 are respectively provided with pressure sensing units 40 for real-time detection of expansion pressure.

[0026] The main body structure 100 is provided with a plurality of circular light-emitting indicator lights 50 on one side, which emit light feedback signals according to pressure values; In order to adapt to the nasal anatomical structure of different patients (adults and children), the present application provides specific size parameters as preferred embodiments: Probe end size: the effective working length of the L-shaped bending structure of the first probe end and the second probe end is 35mm to 55mm, and the distal bending angle is 100° to 120°, so as to conform to the physiological included angle from the nasal vestibule to the nasal threshold.

[0027] Buffer pad thickness: the wall thickness of the flexible buffer pad 13 is designed to be 1.5mm to 3.0mm, which can ensure sufficient buffer protection without affecting the sensitivity of the pressure sensor.

[0028] Expansion range: under the action of the reset spring 30, the tip distance in the initial closed state is 5mm to 10mm, and the maximum expansion degree can reach 30mm to 45mm.

[0029] Vibration parameters: the vibration frequency of the tactile feedback vibration module is set to 150Hz to 200Hz, and the vibration intensity is 0.5G to 1.5G, so as to ensure that it can still be clearly perceived in the case of wearing medical gloves.

[0030] Specifically, on the visible plane of the main body structure 100, a plurality of circular light-emitting indicator lights 50 are integrated. These indicator lights adopt LED array or optical fiber structure, and their physical positions are set in the direct vision field of the doctor during operation, such as above the hinge or on the back side of the holding part. The circular light-emitting indicator light 50 is connected with the internal signal processing unit, and can change the light-emitting state including color switching, brightness change or flicker frequency change according to the received driving signal, so as to convert the detected invisible pressure value into visual light feedback signal as the output terminal.

[0031] The first probe end and the second probe end are both L-shaped bending structures, the flexible buffer pad 13 is made of medical grade high polymer silica gel, and the outer surface of the flexible buffer pad 13 is provided with a micro-convex anti-skid structure for increasing the friction of the tissue; Specifically, the geometric shape of the first probe end and the second probe end is designed as an L-shaped bending structure, which includes a vertical extension section and a horizontal expansion section to adapt to the anatomical path from the nasal vestibule to the nasal threshold. The flexible buffer pad 13 is made of medical grade high polymer silica gel with low Shore hardness, which has biocompatibility and deformability. On the contact outer surface of the flexible buffer pad 13, the mold is formed with an array of micro-convex anti-skid structures such as hemispherical or pyramidal micro-dot array, which is used to increase the static friction coefficient between the probe and the nasal mucosa tissue, and prevent the dilator from slipping and displacing in the open state due to the lubrication of mucosa secretion.

[0032] The pressure sensing unit 40 is selected from a flexible film pressure sensor, which is attached to the outside of the rigid skeleton of the first or second probe end, and the sensing surface of the flexible film pressure sensor is completely covered by the flexible buffer pad 13, thereby detecting the deformation signal of the flexible buffer pad 13 under pressure; Specifically, the pressure sensing unit 40 is selected from a flexible film pressure sensor such as a piezoresistive or capacitive film sensor. In the assembly process, the base layer of the flexible film pressure sensor is attached and fixed to the outer surface of the internal rigid skeleton of the first or second probe end by a medical adhesive. The flexible buffer pad 13 is covered on the sensor, so that the effective sensing area ActiveArea of the flexible film pressure sensor is completely wrapped by the flexible buffer pad 13. When the external tissue presses the flexible buffer pad 13, the pressure is uniformly transmitted to the sensor sensing surface through the silicone medium, thereby detecting the electrical signal in linear or nonlinear relationship with the deformation degree of the flexible buffer pad 13 under pressure.

[0033] The control circuit module is also provided inside the main body structure 100, and is electrically connected with the pressure sensing unit 40 and the circular light-emitting indicator lamp 50; the control circuit module receives the pressure data collected by the pressure sensing unit 40, and compares the pressure data with the preset safe pressure threshold interval; Specifically, the control circuit module PCB mainboard is provided in the internal sealed cavity of the main body structure 100. The control circuit module is electrically connected with the front-end pressure sensing unit 40 and the side circular light-emitting indicator lamp 50 through the flexible circuit board FPC or wire. The control circuit module is integrated with a microprocessor MCU and an analog-to-digital converter ADC, and the execution logic includes: reading the analog voltage or resistance signal output by the pressure sensing unit 40 at a preset sampling frequency, converting it into digital real-time pressure data, and performing numerical comparison operation on the data with the preset safe pressure threshold interval in the memory.

[0034] The control circuit module is provided with a first pressure threshold and a second pressure threshold greater than the first pressure threshold; when the pressure data is less than the first pressure threshold, the circular light-emitting indicator lamp 50 displays the first color; when the pressure data is between the first pressure threshold and the second pressure threshold, the circular light-emitting indicator lamp 50 displays the second color; when the pressure data is greater than the second pressure threshold, the circular light-emitting indicator lamp 50 displays the third color; Specifically, the storage unit of the control circuit module has a first pressure threshold T1 and a second pressure threshold T2 defining pressure levels written in advance, wherein the value of T2 is greater than T1. The control program performs the following logical judgment: when the real-time collected pressure data is less than the first pressure threshold P < T1, output the first PWM control signal to drive the circular light-emitting indicator lamp 50 to display the first color, such as green, indicating that the current is in a low-pressure safe contact state; when the pressure data is between the first pressure threshold and the second pressure threshold T1 ≤ P ≤ T2, output the second control signal to drive the indicator lamp to display the second color, such as yellow, indicating that the effective expansion and pressure are reached. The working state; when the pressure data is greater than the second pressure threshold P > T2, output the third control signal to drive the indicator lamp to display the third color, such as red, indicating that the pressure is overloaded, prompting to stop pressing.

[0035] Further, considering that the contact pressure of the nasal mucosa tissue belongs to the category of weak signals (usually in the range of 0.1N to 5N), and the response signal of the flexible thin film pressure sensor is easily disturbed by high-frequency noise, the application adopts the following three-level signal processing mechanism to ensure the accuracy of measurement: First level: analog front-end signal conditioning (Hardware Conditioning) The voltage signal generated by the resistance change or capacitance change of the flexible thin film pressure sensor when it is pressed is extremely weak (usually in the order of millivolts mV). The front end of the control circuit module integrates a high-precision instrumentation amplifier. The amplifier builds a Wheatstone bridge or a voltage dividing circuit, which is specifically used to amplify the weak analog signal output by the sensor with high gain, and to lift it to the standard voltage range (such as 0V~3.3V) that the microprocessor can recognize, while filtering out power frequency interference and high-frequency electronic noise using a low-pass filter circuit (RC Filter).

[0036] Second level: high-resolution analog-to-digital conversion (ADCSampling) The amplified analog signal is input to the high-precision analog-to-digital converter (ADC) interface of the microprocessor. In order to capture subtle pressure fluctuations, the embodiment preferably uses a 12-bit or higher ADC sampling module to perform high-frequency discrete sampling on the analog signal. This allows the system to distinguish very small pressure step changes, ensuring that the resolution of the perception of nasal mucosa contact force reaches 0.1N or even higher accuracy.

[0037] Third level: digital filtering and nonlinear compensation (DigitalProcessing) After the microprocessor receives the original digital signal, it performs the following core calculation logic: De-noising and smoothing: Moving Average Filter or Kalman Filter is used to eliminate the sudden noise caused by the operator's hand tremor, and obtain a smooth pressure reference value.

[0038] Nonlinear compensation: Considering the possible nonlinear transmission characteristics between the elastic deformation of the flexible cushion 13 and the pressure sensor, the microprocessor internally pre-stores a pressure-voltage mapping table (Look-up Table) or a high-order fitting formula. The system corrects the hysteresis effect of the silica gel material through interpolation operation or polynomial calculation according to the real-time collected voltage value, finally calculates the real physical pressure value (unit: N or kPa), and compares it with the preset threshold (T1, T2).

[0039] The reset spring 30 is arranged at the connection between the first jaw arm 10 and the second jaw arm 20, and the first jaw arm 10 and the second jaw arm 20 are provided with limiting grooves for limiting the displacement of the reset spring 30, and the reset spring 30 provides a torsional moment for keeping the first insertion end and the second insertion end closed; Specifically, the reset spring 30 is a double torsional spring structure coaxially installed on the pin shaft connecting the first jaw arm 10 and the second jaw arm 20. Corresponding limiting groove structures are respectively machined on the inner side walls of the first jaw arm 10 and the second jaw arm 20, for accommodating and fixing the two force arm ends of the reset spring 30. The torsional moment direction of the reset spring 30 is configured to generate a tendency of opposite movement of the first insertion end and the second insertion end. When the operator releases the holding part, the elastic potential energy released by the reset spring 30 drives the jaw arm to rotate around the shaft, so that the distal end of the dilator is automatically closed and generates a moderate clamping force to maintain the closed form.

[0040] The outer surfaces of the first holding part 11 and the second holding part 12 are provided with an arc shape conforming to the palm grip, and a micro battery module is arranged in the internal cavity of the first holding part 11 or the second holding part 12 to supply power to the pressure sensing unit 40; Specifically, the outer contour surface of the first holding part 11 and the second holding part 12 is designed as an arc shape conforming to the palm thenar muscle and finger pulp curve to increase the holding stability. The first holding part 11 or the second holding part 12 is hollowed in the inside to form an accommodation cavity, and a micro battery module such as a button cell or a small lithium polymer battery is installed in the cavity. The micro battery module is connected with the control circuit module through a power management circuit to provide a stable direct current working voltage for the pressure sensing unit 40, the processor and the circular light emitting indicator 50.

[0041] The nasal cavity minimally invasive flexible dilating system further comprises a tactile feedback vibration module arranged in the first holding part 11 or the second holding part 12, and the tactile feedback vibration module is electrically connected with the control circuit module; Specifically, in addition to the light feedback, the nasal cavity minimally invasive flexible expansion system is rigidly connected with a tactile feedback vibration module such as a linear motor LRA or an eccentric rotor motor ERM inside the shell of the first holding part 11 or the second holding part 12. The driving end of the tactile feedback vibration module is electrically connected with the power output port of the control circuit module. The module is physically installed at a position capable of effectively transmitting mechanical vibration to the palm area of the operator.

[0042] When the control circuit module detects that the pressure data exceeds the preset dangerous pressure threshold, the tactile feedback vibration module is driven to generate a vibration signal; Specifically, the control circuit module is also provided with a dangerous pressure threshold value independent of the light feedback threshold value , usually >T2. During the operation of the system, when the real-time monitored pressure data exceeds the preset dangerous pressure threshold, the control circuit module immediately sends a high-level or pulse driving signal to the tactile feedback vibration module, and drives the motor to generate a continuous or intermittent vibration signal. The vibration signal is directly transmitted to the hand nerve of the operator through the holding part shell, providing an instant overload physical warning without visual participation.

[0043] Working principle: The main structure 100 works by the principle of lever. When external force is applied to the first holding part 11 and the second holding part 12 to make them approach each other, the first jaw arm 10 and the second jaw arm 20 rotate around the pivot at the connection, overcoming the torsional moment provided by the reset spring 30, and driving the first probe-in end and the second probe-in end with L-shaped curved structure at the distal end to open outward. During the expansion process, the flexible buffer pad 13 made of medical-grade high-molecular silicone rubber material covering the outside of the rigid skeleton of the probe-in end contacts the nasal cavity inner wall tissue, and the micro-protrusion anti-skid structure on its surface increases the contact friction. As the expansion amplitude increases, the reaction force generated by the nasal cavity tissue acts on the flexible buffer pad 13, and the pressure sensing unit 40, i.e. the flexible diaphragm pressure sensor, located between the flexible buffer pad 13 and the rigid skeleton, senses the pressure deformation and generates a corresponding electrical signal. The control circuit module arranged inside the main structure 100 receives the electrical signal and analyzes it into real-time pressure data, and then executes data comparison logic. The control circuit module is provided with a first pressure threshold value and a second pressure threshold value with a larger value. When the real-time pressure data is less than the first pressure threshold value, the control circuit module outputs a signal to drive the circular light indicator 50 to display a first color; when the pressure data is between the first pressure threshold value and the second pressure threshold value, the circular light indicator 50 is driven to display a second color; when the pressure data is greater than the second pressure threshold value, the circular light indicator 50 displays a third color. At the same time, if the pressure data exceeds the preset dangerous pressure threshold, the control circuit module sends a driving signal to the tactile feedback vibration module located in the holding part to generate mechanical vibration. After the external force is removed, the first probe-in end and the second probe-in end automatically reset to the closed state under the elastic biasing force of the reset spring 30.

[0044] To further illustrate the technical effects of the present application, the specific workflow of the present application is described below in combination with the scene of endoscopic examination of the nose: Initial placement: the operator holds the first grip 11 and the second grip 12, at which time the first insertion end and the second insertion end at the front end are in a natural closed state under the action of the reset spring 30. The operator gently stretches the closed insertion end into the patient's nasal vestibule area, benefiting from the silicone material of the flexible buffer pad 13, which avoids the discomfort caused by the metal coldness and hard touch in this process.

[0045] Gradual expansion and light feedback guidance: the operator slowly presses the grip to drive the pincer arm to open. As the flexible buffer pad 13 contacts and expands the nasal threshold tissue, the pressure sensing unit 40 begins to collect resistance data in real time.

[0046] Stage A contact period: when the pressure is smaller than the first pressure threshold, the circular light indicator 50 displays the first color such as green, prompting the operator that the current pressure is safe and the expansion can continue.

[0047] Stage B optimal operation period: as the expansion amplitude increases, when the pressure data enters the preset optimal interval between the first and second pressure thresholds, the indicator light switches to the second color such as yellow. At this time, it is prompted that the expansion degree is moderate, the field of view is well exposed and the tissue is not damaged, and the operator can maintain the current opening degree for endoscopic examination. In this state, the micro-protrusion anti-slip structure on the surface of the flexible buffer pad 13 uses increased friction to ensure that the instrument is tightly attached to the mucosa and does not slip off.

[0048] Overload fuse and tactile warning: if the operator causes excessive force due to limited field of view or operation error, so that the pressure data instantaneously exceeds the preset dangerous pressure threshold, the system immediately triggers double warnings: the circular light indicator 50 instantaneously changes to the third color such as red flashing, and the tactile feedback vibration module in the grip starts to produce obvious mechanical vibration. The vibration signal directly stimulates the palm nerve of the operator, prompting him to instinctively relax the grip, thereby achieving forced protection of the nasal tissue.

[0049] Reset and withdrawal: after the examination is completed, the operator slowly releases the grip, and the reset spring 30 releases the elastic potential energy to assist the first insertion end and the second insertion end to smoothly close, and then the instrument is safely withdrawn from the nasal cavity.

[0050] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Any person skilled in the art, without departing from the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application, or modify equivalent embodiments, by using the disclosed methods and technical contents. Therefore, any equivalent changes made according to the shape, structure and principle of the present application, without departing from the technical scheme of the present application, should be covered by the protection scope of the present application.

Claims

1. A minimally invasive flexible nasal cavity expansion system with pressure feedback function, characterized in that, The device includes a main structure (100), on which a first clamp arm (10) and a second clamp arm (20) are movably connected on both sides. The first clamp arm (10) and the second clamp arm (20) are respectively provided with a first gripping part (11) and a second gripping part (12) at their proximal ends. The first clamp arm (10) and the second clamp arm (20) are respectively provided with a first probing end and a second probing end at their distal ends. A reset spring (30) providing elastic biasing force is also provided between the first clamp arm (10) and the second clamp arm (20). The outer surfaces of the first probe end and the second probe end that come into contact with human tissue are respectively provided with flexible buffer pads (13), and pressure sensing units (40) for real-time detection of expansion pressure are provided on the outer sides of the two flexible buffer pads (13).

2. The nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 1, characterized in that, The main structure (100) has multiple circular light-emitting indicator lights (50) on one side that emit light feedback signals according to the pressure value.

3. The nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 1, characterized in that, Both the first probe end and the second probe end have an L-shaped curved structure. The flexible buffer pad (13) is made of medical-grade high molecular silicone, and the outer surface of the flexible buffer pad (13) is provided with a micro-protrusion anti-slip structure to increase tissue friction.

4. The nasal cavity minimally invasive flexible expansion system with pressure feedback function according to claim 1, characterized in that, The pressure sensing unit (40) is a flexible thin film pressure sensor. The flexible thin film pressure sensor is attached to the outside of the rigid frame of the first probe end or the second probe end, and the sensing surface of the flexible thin film pressure sensor is completely covered by the flexible buffer pad (13), thereby detecting the deformation signal of the flexible buffer pad (13) when it is compressed.

5. A nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 2, characterized in that, The main structure (100) is also equipped with a control circuit module, which is electrically connected to the pressure sensing unit (40) and the circular light indicator (50). The control circuit module receives the pressure data collected by the pressure sensing unit (40) and compares the pressure data with the preset safe pressure threshold range.

6. A nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 5, characterized in that, The control circuit module is configured with a first pressure threshold and a second pressure threshold whose value is greater than the first pressure threshold. When the pressure data is less than the first pressure threshold, the circular light indicator (50) displays a first color. When the pressure data is between the first pressure threshold and the second pressure threshold, the circular light indicator (50) displays a second color. When the pressure data is greater than the second pressure threshold, the circular light indicator (50) displays a third color.

7. The nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 1, characterized in that, The reset spring (30) is disposed at the connection between the first clamp arm (10) and the second clamp arm (20), and the first clamp arm (10) and the second clamp arm (20) are provided with limiting grooves for limiting the displacement of the reset spring (30). The reset spring (30) provides a torsional torque that keeps the first probe end and the second probe end in a closed tendency.

8. A nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 1, characterized in that, The outer surfaces of the first grip (11) and the second grip (12) are provided with an arc shape that conforms to the palm grip, and a micro battery module for powering the pressure sensing unit (40) is provided in the internal cavity of the first grip (11) or the second grip (12).

9. A nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 5, characterized in that, It also includes a tactile feedback vibration module disposed in the first grip portion (11) or the second grip portion (12), the tactile feedback vibration module being electrically connected to the control circuit module.

10. A nasal cavity minimally invasive flexible expansion system with pressure sensing feedback function according to claim 9, characterized in that, When the pressure data exceeds a preset dangerous pressure threshold, the control circuit module drives the tactile feedback vibration module to generate a vibration signal.

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