Finger clamping type pulse oximeter for clinical nursing

Abstract

The invention discloses a finger clamping type pulse oximeter for clinical nursing, and relates to the technical field of medical instruments. Comprising a bottom shell, the bottom shell is rotationally connected with a rotating shaft, the rotating shaft is rotationally connected with a turning shell, and the turning shell is detachably connected with a clamping plate; the elastic piece is detachably connected between the turning shell and the clamping plate, the elastic piece is fixedly connected with a light generator located between the bottom shell and the turning shell, the elastic piece is used for keeping the position of the light generator so that the light generator can make contact with nails of a patient, and the bottom shell is fixedly connected with a light receiver. The elastic force of the elastic sheet is utilized to extrude the light generator towards the fingernail direction of the patient, so that the light generator can be in contact with the fingernail of the patient, the gap between the light generator and the fingernail of the patient is reduced, the light intensity effectively penetrating biological tissue is kept, and the intensity of light signals received by the light receiver is kept within the normal range; and the measurement error is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a finger-clamp type pulse oximeter for clinical nursing. BACKGROUND

[0002] The finger-clamp type pulse oximeter is a medical device for non-invasive real-time monitoring of blood oxygen saturation and heart rate of human body. In clinical nursing, medical staff needs to regularly monitor the patient's condition using the finger-clamp type pulse oximeter. When using the device, the patient inserts the index finger or middle finger into the detection cavity, ensures that the fingernail is opposite to the light sensor, and the finger pulp is close to the photoreceptor surface. After closing the device, the oximeter is clamped and fixed at the distal interphalangeal joint. At this time, the light sensor and the fingernail surface, and the photoreceptor and the finger pulp need to be in complete contact. After keeping the finger still, the blood oxygen and heart rate measurement can be started. For patients with osteoarthritis and other conditions that cause swelling of the finger joints, the shape of the distal interphalangeal joint changes, and a gap between the light sensor and the fingernail surface may occur. In this case, the near-infrared light emitted by the light sensor will escape through the gap, the light intensity effectively penetrating the biological tissue is reduced, and the light signal intensity obtained by the photoreceptor is insufficient, which ultimately leads to physiological parameter measurement error. SUMMARY

[0003] The present application provides a finger-clamp type pulse oximeter for clinical nursing to overcome the problem of insufficient light signal intensity and physiological parameter measurement error caused by the gap between the light sensor and the fingernail surface due to swelling of the patient's finger joints.

[0004] The technical implementation of the present application is as follows: a finger-clamp type pulse oximeter for clinical nursing, comprising: a bottom shell, a rotating shaft connected to the bottom shell, a turning shell connected to the rotating shaft, a torsional spring fixed between the bottom shell and the turning shell, and a clamping plate detachably connected to the turning shell; an elastic sheet detachably connected between the turning shell and the clamping plate, a light generator fixed between the bottom shell and the turning shell, the elastic sheet being used to keep the position of the light generator and make the light generator contact with the patient's fingernail, a light receiver fixed to one side of the bottom shell close to the light generator, and a light source provided on one side of the light generator close to the light receiver.

[0005] Further, the opposite sides of the bottom shell and the turning shell are both fixed with elastic pads to increase the contact area between the bottom shell, the turning shell and the patient's finger.

[0006] Further, the elastic coefficients of the elastic sheet and the elastic pads are both smaller than the elastic coefficient of the torsional spring between the bottom shell and the turning shell.

[0007] Further, a positioning strip is fixed to one side of the bottom shell close to the light receiver, which facilitates positioning of the patient's fingers.

[0008] Further, the positioning strip is made of silica gel and has an arc-shaped cross section, which reduces the pressure of the positioning strip on the blood vessels in the patient's fingers.

[0009] Further, the application further comprises: A traction strip is limitingly and slidably connected to the turning shell and fixed to the light generator, which limits the position of the light generator.

[0010] Further, one end of the traction strip away from the light generator penetrates through the turning shell and is fixed to the bottom shell.

[0011] Further, the application further comprises: Two pressing blocks are fixed to one side of the light generator close to the bottom shell, and the two pressing blocks are made of elastic silica gel, which increases the friction between the light generator and the patient's nails.

[0012] Further, two shielding blocks are fixed to one side of the light generator close to the bottom shell, the shielding blocks and the pressing blocks are made of light-proof materials, the pressing blocks are in contact with the shielding blocks, and the two pressing blocks and the two shielding blocks are respectively located around the light source of the light generator, which shields the light source of the light generator.

[0013] Further, the two pressing blocks away from the light generator are respectively provided with first arc-shaped surfaces, and the two shielding blocks away from the light generator are respectively provided with second arc-shaped surfaces, which increase the contact area with the patient's nails.

[0014] In summary, the application has at least one of the following beneficial technical effects: the elastic force of the elastic sheet extrudes the light generator towards the patient's nails, so that the light generator can be in contact with the patient's nails, the gap between the light generator and the patient's nails is reduced, the light intensity effectively penetrating the biological tissue is maintained, the light signal intensity received by the light receiver is maintained within a normal range, and the measurement error is reduced.

[0015] The elastic pad is in contact with the patient's finger joints, reducing the hard compression of the patient's finger joints, reducing the patient's discomfort, increasing the friction between the elastic pad and the patient's finger after the deformation of the elastic pad under compression, improving the stability of the bottom shell and the shell when clamping the patient's finger, reducing the probability of relative movement between the light generator and the patient's finger due to the patient's movement, thereby maintaining the stable transmission of the light signal and maintaining the accuracy of the patient's blood oxygen and heart rate detection results. Meanwhile, the deformable property of the elastic pad reduces the angle between the bottom shell and the shell, thereby reducing the distance between the detection cavity side wall and the patient's finger, facilitating the contact between the light generator and the patient's nail.

[0016] The positioning strip is in contact with the patient's finger, guiding the patient's finger to be attached to the light receiver, facilitating the positioning of the patient's finger in the detection cavity.

[0017] The traction strip is used to fix the light generator, reducing the probability of hard collision of the light generator due to the falling or bumping of the oximeter, protecting the light generator, and when the bottom shell and the shell are opened, the traction strip is used to swing the light generator, so that the light generator approaches the concave surface of the shell, thereby increasing the space of the detection cavity, facilitating the patient's finger to enter the detection cavity, and improving the convenience of blood oxygen and heart rate detection.

[0018] The extrusion block and the shielding block are used to shield the gap between the light generator and the patient's nail, reducing the probability of escape of near-infrared light from the gap between the light generator and the nail, and the friction between the extrusion block and the patient's nail maintains the relative static state of the light generator and the patient's nail, reducing the probability of relative movement between the light generator and the patient's nail, thereby maintaining the accuracy and reliability of the detection results. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the present application; Figure 5 It is a schematic diagram of the three-dimensional structure of the present application.

[0020] The marks of each component in the drawings are as follows: 1-bottom shell, 2-rotating shaft, 3-shell, 4-clamping plate, 5-elastic sheet, 6-light generator, 7-light receiver, 8-elastic pad, 9-positioning strip, 10- traction strip, 11-extrusion block, 12-shielding block. DETAILED DESCRIPTION

[0021] Other features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the application. The purposes and other advantages of the application will be realized and attained by the structures particularly pointed out in the written description and claims hereof.

[0022] A finger clip type pulse oximeter for clinical care, see Figures 1-3 , comprising: a bottom shell 1, the bottom shell 1 is rotationally connected with a rotating shaft 2, the rotating shaft 2 is rotationally connected with a turning shell 3, a torsional spring is fixedly connected between the bottom shell 1 and the turning shell 3, and the turning shell 3 is detachably connected with a clamping plate 4; an elastic sheet 5 is detachably connected between the turning shell 3 and the clamping plate 4, the elastic sheet 5 is fixedly connected with a light generator 6 located between the bottom shell 1 and the turning shell 3, the elastic sheet 5 is used for keeping the position of the light generator 6, so that the light generator 6 is in contact with the patient's fingernail, a light receiver 7 is fixedly connected to one side of the bottom shell 1 close to the light generator 6, and a light source is arranged on one side of the light generator 6 close to the light receiver 7.

[0023] In the above scheme, the problem of insufficient light signal intensity caused by the gap between the light sensor and the surface of the fingernail due to the swelling of the patient's finger joint, which leads to physiological parameter measurement error, is solved; the elastic sheet 5 is used to press the light generator 6 towards the patient's fingernail, so that the light generator 6 can be in contact with the patient's fingernail, the gap between the light generator 6 and the patient's fingernail is reduced, the light intensity effectively penetrating the biological tissue is maintained, the light signal intensity received by the light receiver 7 is kept within the normal range, and the measurement error is reduced; the clamping plate 4 can be detachably installed on the turning shell 3 by means of buckle connection; the upper part of the elastic sheet 5 is provided with a rectangular through hole, the clamping plate 4 passes through the rectangular through hole of the elastic sheet 5 and presses the upper part of the elastic sheet 5 to the state of being attached to the turning shell 3; the elastic sheet 5 is C-shaped as a whole, which is used to make the light generator 6 initially protrude from the lower side of the turning shell 3; the opposite sides of the bottom shell 1 and the turning shell 3 are both provided with concave surfaces, and the two concave surfaces of the bottom shell 1 and the turning shell 3 together form a detection cavity.

[0024] See Figures 1-3 , the opposite sides of the bottom shell 1 and the turning shell 3 are both fixedly connected with elastic pads 8, which are used to increase the contact area between the bottom shell 1, the turning shell 3 and the patient's finger; the elastic coefficients of the elastic sheet 5 and the elastic pad 8 are both smaller than the elastic coefficient of the torsional spring between the bottom shell 1 and the turning shell 3; a positioning strip 9 is fixedly connected to one side of the bottom shell 1 close to the light receiver 7, which is convenient for the patient's finger positioning; the positioning strip 9 is made of silica gel, and the cross section of the positioning strip 9 is arched, which is used to reduce the pressure of the positioning strip 9 on the blood vessels in the patient's finger.

[0025] In the above scheme, the contact of the elastic pad 8 with the patient's finger joint is used to reduce the hard compression of the patient's finger joint, reduce the patient's discomfort, increase the friction between the elastic pad 8 and the patient's finger after the deformation of the elastic pad 8 under compression, improve the stability of the bottom shell 1 and the turning shell 3 when clamping the patient's finger, reduce the probability of relative movement between the light generator 6 and the patient's finger due to the patient's movement, thereby maintaining the stable transmission of the light signal and maintaining the accuracy of the patient's blood oxygen and heart rate detection results. At the same time, the deformable property of the elastic pad 8 reduces the angle between the bottom shell 1 and the turning shell 3, thereby reducing the distance between the detection cavity side wall and the patient's finger, facilitating the contact of the light generator 6 with the patient's fingernail; the contact of the positioning strip 9 with the patient's finger guides the patient's finger to be in contact with the light receiver 7, facilitating the positioning of the patient's finger in the detection cavity; the elastic pad 8 can be made of silicone, which can deform when compressed by the patient's finger joint; under the action of the torsion spring between the bottom shell 1 and the turning shell 3, the patient's finger joint can deform the elastic pad 8, so that the patient's fingernail can be in contact with the light generator 6, and the light generator 6 can press the elastic sheet 5 to bend and deform; the positioning strip 9 is a thin film made of silicone, and the cross section of the positioning strip 9 is arched, so that the patient's finger can touch and feel the position of the positioning strip 9, and when the patient's finger presses the positioning strip 9, the positioning strip 9 will deform and accumulate on the concave surface of the bottom shell 1, reducing the pressure on the patient's finger blood vessels and reducing the interference with the patient's finger blood flow; the positioning strip 9 is six, and is divided into two groups with equal distance, and the two groups of positioning strips 9 are located on the front and back of the light receiver 7.

[0026] The working principle of the above scheme is as follows: when the device is used to monitor the patient's blood oxygen and heart rate, for patients who can act independently, medical staff guide the patient to use the device, so that the patient regularly wears the device for monitoring. The process of the patient wearing the device is as follows: the patient presses the right part of the bottom shell 1 and the turning shell 3, twists the torsion spring between the bottom shell 1 and the turning shell 3, opens the left part of the bottom shell 1 and the turning shell 3, increases the detection cavity, and the patient's index finger or middle finger (hereinafter referred to as index finger) is inserted into the detection cavity, and the patient's index finger is in contact with the six positioning strips 9. Then the patient adjusts the position of the index finger, and when the patient feels that the index finger is in contact with the two positioning strips 9 in the middle, the patient stops moving the finger. At this time, the index finger of the patient is in contact with the middle part of the light receiver 7, the fingernail of the patient's index finger corresponds to the light source of the light generator 6, and the patient's index finger joint is in contact with the elastic pad 8 on the bottom shell 1.

[0027] After the patient stops moving their finger, the patient gradually releases the right side of the base shell 1 and the flip shell 3. Under the action of the torsion spring between the base shell 1 and the flip shell 3, the angle between the left side of the base shell 1 and the flip shell 3 decreases, reducing the size of the detection cavity. During this process, the flip shell 3 moves the elastic plate 5 and the elastic pad 8 together. The elastic plate 5 moves the light generator 6, so that the lower right side of the light generator 6 first contacts the patient's index fingernail. Then, the light generator 6 rotates counterclockwise under the action of the elastic plate 5 (in this article, it is referred to as...). Figure 1 (The front view is a rotating perspective) The elastic sheet 5 swings, deforms, and reduces the included angle corresponding to the bending point of the elastic sheet 5 until the light generator 6 is in stable contact with the patient's nail (stable contact here means that at least two points on the light generator 6 are in contact with the patient's nail). At this time, the light generator 6 stops swinging, and the light source on the light generator 6 is in contact with the patient's nail. As the included angle between the flip shell 3 and the bottom shell 1 continues to decrease, the light generator 6 continues to squeeze the elastic sheet 5 to deform, causing the lower end of the elastic sheet 5 to move upward. In this way, during the detection process, the elastic sheet 5 is always in a deformed and charged state, and the elastic sheet 5 is used to maintain the contact between the light generator 6 and the patient's nail.

[0028] As the flip shell 3 moves the elastic pad 8, the distance between the elastic pad 8 and the patient's index finger joint gradually decreases until the elastic pad 8 contacts the patient's index finger joint (at this time, the elastic sheet 5 is deforming). Through the compression of the patient's index finger joint by the two elastic pads 8, the elastic pad 8 deforms and increases the contact area between the elastic pad 8 and the index finger, reducing the discomfort of the patient wearing the device for a long time. At the same time, due to the deformation of the elastic pad 8, the angle between the bottom shell 1 and the left side of the flip shell 3 continues to decrease, thereby reducing the distance between the concave surface of the flip shell 3 and the patient's index fingernail, making it easier for the light generator 6 to fit against the patient's index fingernail.

[0029] If the patient is unable to move independently, medical staff will put the device on the patient. The medical staff will press down on the right side of the bottom shell 1 and the flip shell 3 to enlarge the detection cavity. Then, the medical staff will insert the patient's index finger into the detection cavity. During this process, the medical staff will judge whether the device has been moved into place based on the position of the light generator 6 and the patient's index fingernail. When the light generator 6 is in contact with or above the patient's index fingernail, the medical staff will release the right side of the bottom shell 1 and the flip shell 3 and repeat the above steps of reducing the angle between the flip shell 3 and the bottom shell 1. This completes the wearing of the device. After the device is worn, the light source of the light generator 6 emits near-infrared light. The near-infrared light passes through the patient's index finger and is received by the light receiver 7, thus realizing the detection of the patient's blood oxygen and heart rate.

[0030] After the detection of the patient's heart rate and blood oxygen is completed, the medical staff or the patient presses the right part of the bottom shell 1 and the turning shell 3 again, so that the detection cavity is enlarged, the two elastic pads 8 gradually recover and lose the extrusion on the patient's index finger joint, the light generator 6 is driven by the elastic sheet 5 to swing clockwise and move to the initial position relative to the turning shell 3, at this time the light generator 6 loses contact with the patient's index finger, then the patient's index finger moves out of the detection cavity, and gradually releases the right part of the bottom shell 1 and the turning shell 3 until the bottom shell 1 and the turning shell 3 are reset.

[0031] Referring to Figure 3 and Figure 4 Further comprising: a traction strip 10, which is limitingly and slidingly connected to the turning shell 3 and is fixedly connected with the light generator 6, is used to limit the position of the light generator 6; one end of the traction strip 10 away from the light generator 6 penetrates through the turning shell 3 and is fixedly connected with the bottom shell 1.

[0032] In the above scheme, the light generator 6 is fixed by the traction strip 10, which reduces the probability that the blood oxygen meter falls or collides and causes the light generator 6 to be hard collided, and protects the light generator 6. At the same time, when the bottom shell 1 and the turning shell 3 are opened, the traction strip 10 is used to swing the light generator 6, so that the light generator 6 approaches the concave surface of the turning shell 3, and then the space of the detection cavity is enlarged, which facilitates the patient's finger to extend into the detection cavity, and improves the convenience of blood oxygen and heart rate detection; the traction strip 10 can be a flexible film, and a polyamide film is selected here, so that the traction strip 10 can maintain the position of the light generator 6 at the beginning, and the light generator 6 is kept in a static state by the joint action of the traction strip 10 and the elastic sheet 5.

[0033] The working principle of the above scheme is as follows: when the device falls, the bottom shell 1 and the turning shell 3 directly collide with the ground, at this time the light generator 6 is in a “suspended” state in the detection cavity under the traction of the elastic sheet 5 and the light receiver 7, that is, the light generator 6 is not in contact with the side wall of the detection cavity, when the light generator 6 moves due to inertia, the probability of hard collision between the light generator 6 and the side wall of the detection cavity is reduced by the elastic force of the elastic sheet 5 and the pulling force of the traction strip 10, and the light generator 6 is protected.

[0034] When the patient presses the right part of the bottom shell 1 and the flip shell 3, the flip shell 3 rotates clockwise relative to the bottom shell 1, and in this process, the flip shell 3 moves the elastic sheet 5, the light generator 6 and the left end of the traction strip 10 together, but the right end of the traction strip 10 fixed on the bottom shell 1 remains stationary, so that the right part of the traction strip 10 is arranged on the bottom shell 1, at this time the traction strip 10 moves right relative to the flip shell 3, the traction strip 10 pulls the right part of the light generator 6 upwards, so that the light generator 6 swings counterclockwise and approaches the concave surface of the flip shell 3, thus increasing the volume of the detection cavity, facilitating the patient to insert the index finger into the detection cavity, at this time the patient inserts the index finger into the designated position in the detection cavity (i.e. the position corresponding to the contact between the index finger and the two positioning strips 9 in the middle), and the patient gradually releases the right part of the bottom shell 1 and the flip shell 3.

[0035] In the process of the patient gradually releasing the right part of the bottom shell 1 and the flip shell 3, the flip shell 3 rotates counterclockwise relative to the bottom shell 1, so that the length of the traction strip 10 arranged on the bottom shell 1 decreases, and the light generator 6 gradually approaches the patient's fingernail under the elastic action of the elastic sheet 5, and then the above-mentioned step of counterclockwise swinging of the light generator 6 after the right lower side of the light generator 6 contacts the patient's fingernail is repeated until the two elastic pads 8 complete the clamping and fixing of the patient's index finger joint, at this time the patient's heart rate and blood oxygen are detected.

[0036] After the detection is completed, the patient presses the right part of the bottom shell 1 and the flip shell 3 again, the light generator 6 approaches the concave surface of the flip shell 3 again under the traction of the traction strip 10, and loses contact with the patient's fingernail, then the patient withdraws the index finger from the detection cavity, and gradually releases the right part of the bottom shell 1 and the flip shell 3, so that the traction strip 10, the light generator 6 and the elastic sheet 5 all return to the original state.

[0037] Referring to Figure 4 and Figure 5 , further comprising: two extrusion blocks 11, each fixedly connected to the side of the light generator 6 close to the bottom shell 1, the two extrusion blocks 11 are made of elastic silica gel material, used to increase the friction between the light generator 6 and the patient's fingernail; the side of the light generator 6 close to the bottom shell 1 is fixedly connected with two shielding blocks 12, the shielding blocks 12 and the extrusion blocks 11 are made of opaque material, the extrusion blocks 11 contact the shielding blocks 12, the two extrusion blocks 11 and the two shielding blocks 12 are respectively located around the light source of the light generator 6, used to shield the light source of the light generator 6; the side of each of the two extrusion blocks 11 away from the light generator 6 is provided with a first arc surface, the side of each of the two shielding blocks 12 away from the light generator 6 is provided with a second arc surface, the first arc surface of the extrusion block 11 and the second arc surface of the shielding block 12 are used to increase the contact area with the patient's fingernail.

[0038] In the above scheme, the gap between the light generator 6 and the patient's nail is shielded by the extrusion block 11 and the shielding block 12, reducing the probability of near-infrared light escaping from the gap between the light generator 6 and the nail, and at the same time, the friction between the extrusion block 11 and the patient's nail keeps the relative static state of the light generator 6 and the patient's nail, reducing the probability of relative movement between the light generator 6 and the patient's nail, thereby maintaining the accuracy and reliability of the detection results; the radii of the first arc surface of the extrusion block 11 and the second arc surface of the shielding block 12 can be set according to the population to which the device is applied, so that the extrusion block 11 and the shielding block 12 can fully contact the patient's nail; the shielding block 12 is made of elastic material, and EVA foam is selected here, so that the shielding block 12 can not only shield light but also have good elasticity.

[0039] The working principle of the above scheme is as follows: during the process of reducing the angle between the bottom shell 1 and the left part of the flip shell 3, the shielding block 12 located at the lower part of the light generator 6 first contacts the patient's nail, and at the same time, the shielding block 12 is extruded and deformed, so that the second arc surface of the shielding block 12 fully adheres to the patient's index finger nail; as the angle between the bottom shell 1 and the left part of the flip shell 3 continues to decrease, the light generator 6 extrudes the elastic sheet 5 and deforms and swings counterclockwise (at this time, the elastic sheet 5 deforms and stores energy), so that the two extrusion blocks 11 simultaneously contact the nail, and as the light generator 6 swings, the first arc surface of the two extrusion blocks 11 gradually increases the contact area with the nail; finally, the shielding block 12 located at the upper part of the light generator 6 contacts the patient's nail, and then the light generator 6 remains static with the patient's nail, and the four sides of the light generator 6 light source are shielded by the two extrusion blocks 11 and the two shielding blocks 12, reducing the probability of near-infrared light escaping from the gap between the light generator 6 and the nail, and maintaining the accuracy and reliability of the detection results.

[0040] In the case of patient movement or involuntary tremor, the elastic sheet 5 deforms to store the elastic force to keep the light generator 6 extruded towards the patient's nail, and the friction between the extrusion block 11 and the patient enables the patient's nail to drive the light generator 6 to move together when the patient's nail deviates relative to the flip shell 3, thereby reducing the probability of detection error caused by repeated changes in the relative position between the patient's nail and the light generator 6 due to patient movement or involuntary tremor.

[0041] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A finger-clip pulse oximeter for clinical nursing, characterized in that, include: Bottom shell (1), the bottom shell (1) is rotatably connected to a rotating shaft (2), the rotating shaft (2) is rotatably connected to a flip shell (3), a torsion spring is fixed between the bottom shell (1) and the flip shell (3), and the flip shell (3) is detachably connected to a locking plate (4). An elastic sheet (5) is detachably connected between the flip shell (3) and the locking plate (4). The elastic sheet (5) is fixedly connected to a light generator (6) located between the bottom shell (1) and the flip shell (3). The elastic sheet (5) is used to maintain the position of the light generator (6) so that the light generator (6) contacts the patient's fingernail. A light receiver (7) is fixedly connected to the side of the bottom shell (1) near the light generator (6). A light source is provided on the side of the light generator (6) near the light receiver (7).

2. A finger-clip pulse oximeter for clinical nursing as described in claim 1, characterized in that, Elastic pads (8) are fixed to the opposite sides of the bottom shell (1) and the flip shell (3) to increase the contact area between the bottom shell (1) and the flip shell (3) and the patient's fingers.

3. A finger-clip pulse oximeter for clinical nursing as described in claim 2, characterized in that, The elastic coefficients of the elastic sheet (5) and the elastic pad (8) are both less than the elastic coefficient of the torsion spring between the bottom shell (1) and the flip shell (3).

4. A finger-clip pulse oximeter for clinical nursing as described in claim 2, characterized in that, A positioning strip (9) is fixed to the side of the bottom shell (1) near the light receiver (7), and the positioning strip (9) facilitates the positioning of the patient's finger.

5. A finger-clip pulse oximeter for clinical nursing as described in claim 4, characterized in that, The positioning strip (9) is made of silicone and has an arched cross section to reduce the pressure of the positioning strip (9) on the blood vessels inside the patient's finger.

6. A finger-clip pulse oximeter for clinical nursing according to claim 2, characterized in that it further includes... include: The traction bar (10) is slidably connected to the flip shell (3) and fixed to the light generator (6) to limit the position of the light generator (6).

7. A finger-clip pulse oximeter for clinical nursing as described in claim 6, characterized in that, The end of the traction bar (10) away from the light generator (6) passes through the flip shell (3) and is fixed to the bottom shell (1).

8. A finger-clip pulse oximeter for clinical nursing according to claim 7, characterized in that it further includes... include: Two extrusion blocks (11) are fixed to the side of the light generator (6) near the bottom shell (1). The two extrusion blocks (11) are made of elastic silicone material and are used to increase the friction between the light generator (6) and the patient's fingernail.

9. A finger-clip pulse oximeter for clinical nursing according to claim 8, characterized in that, Two blocking blocks (12) are fixed to one side of the light generator (6) near the bottom shell (1). The blocking blocks (12) and the squeezing blocks (11) are both made of opaque material. The squeezing blocks (11) are in contact with the blocking blocks (12). The two squeezing blocks (11) and the two blocking blocks (12) are located around the light source of the light generator (6) respectively, and are used to block the light source of the light generator (6).

10. A finger-clip pulse oximeter for clinical nursing according to claim 9, characterized in that, Both of the two squeezing blocks (11) have a first arc-shaped surface on the side away from the light generator (6), and both of the two blocking blocks (12) have a second arc-shaped surface on the side away from the light generator (6). The first arc-shaped surface of the squeezing block (11) and the second arc-shaped surface of the blocking block (12) are used to increase the contact area with the patient's nail.

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