A PICC in vitro measurement method

Abstract

The present invention discloses a PICC in vitro measurement method, wherein the PICC in vitro measurement mechanism comprises a housing and a digital rolling ruler arranged in the housing; wherein the housing comprises a front end and a rear end, the front end is rotatably connected with a measuring roller, the measuring roller and the digital rolling ruler are connected through a synchronous belt transmission; the outer edge of the measuring roller extends out of the front end of the housing. The embodiment of the present invention can accurately measure the specific distance from the puncture position to the target position, so that the puncture can be performed accurately, further reducing the discomfort of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a PICC in vitro measurement mechanism and method. Background Art

[0002] Peripherally Inserted Central Catheter (PICC) is a catheter that is inserted into a vein in a peripheral area (such as the thigh). The catheter goes directly to the large vein close to the heart, avoiding direct contact between chemotherapy drugs and the thigh veins. In addition, the blood flow in the large veins is very fast, which can quickly dilute the chemotherapy drugs and prevent the drugs from irritating the blood vessels. Therefore, it can effectively protect the veins of the lower limbs, reduce the occurrence of phlebitis, relieve the patient's pain, and improve the patient's quality of life.

[0003] Currently, PICC catheterization is usually performed in one of the basilic vein, middle vein, or cephalic vein in the patient's thigh. The catheter is inserted directly into the superior vena cava, and a blood vessel with good elasticity and exposure needs to be selected.

[0004] However, in the above method, since it is impossible to accurately measure the distance from the catheter to the superior vena cava during the PICC catheterization process, medical staff need to estimate the distance and repeatedly insert and remove the catheter, which will increase the risk of infection and cause discomfort to the patient during the PICC catheterization process. If the PICC catheter tip does not reach the ideal position, the incidence of venous thrombosis after PICC catheterization will increase. Summary of the invention

[0005] The object of the present invention is to provide a PICC in vitro measurement mechanism and method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect of an embodiment of the present invention, a PICC in vitro measurement mechanism is provided, which includes a shell and a digital rolling ruler arranged in the shell; wherein the shell includes a front end and a rear end, the front end is rotatably connected to a measuring roller, and the measuring roller is connected to the digital rolling ruler through a synchronous belt transmission; the outer edge of the measuring roller extends out of the front end of the shell.

[0008] Optionally, in an embodiment of the present invention, when measuring in vitro, the PICC in vitro measurement mechanism can be held by hand, and the measuring roller can be made close to the patient's skin, and then the shell can be held by hand to make the measuring roller roll on the patient's skin. Driven by the synchronous belt, the digital rolling ruler also starts to rotate, so that the distance of the measuring roller rolling can be accurately measured to measure the specific distance from the patient's PICC puncture point to the target position (for example, the horizontal part of the patient's xiphoid process).

[0009] Optionally, in an embodiment of the present invention, a tensioning wheel is further provided between the digital rolling ruler and the measuring roller, and the synchronous belt cooperates with the tensioning wheel for transmission.

[0010] It can be understood that the tensioning wheel can be set to keep the synchronous belt in a taut state, so that when the measuring roller rolls, the digital rolling ruler can be driven to roll quickly to accurately measure the distance.

[0011] Optionally, in an embodiment of the present invention, a locking wheel is rotatably connected to the shell, and a locking pressure block is connected to the edge of the shell near the locking wheel. The locking pressure block includes an external pressing portion, a connecting column and an internal locking plate. A limiting ring that cooperates with the inner edge of the shell is connected to the connecting column. A restoring spring is compressed between the external pressing portion and the outer edge of the shell. A through hole that cooperates with the connecting column is opened on the shell; the internal locking plate is in pressure contact with the locking wheel.

[0012] It can be understood that when measuring, if the user controls the measuring roller to roll from the patient's puncture position to the target position, the user can press the external pressing part of the locking block to make the internal locking piece closely contact with the synchronous belt, thereby locking the synchronous belt. At this time, the user can retract the measuring roller from the patient's skin and read the distance value on the digital rolling ruler. By setting the locking block, the rolling of the measuring roller during the distance reading process can be avoided, which causes the read distance value to be inaccurate.

[0013] Optionally, in an embodiment of the present invention, a synchronous belt connecting ring is provided on the outer edge of the digital rolling ruler, and the inner edge of the synchronous belt connecting ring is connected to the outer edge of the digital rolling ruler by an adhesive layer; the synchronous belt connecting ring includes an inner ring body and a synchronous belt connecting groove provided on the inner ring body, and synchronous ridges are evenly distributed in the synchronous belt connecting groove.

[0014] Optionally, in an embodiment of the present invention, synchronous ridges are provided in the wheel grooves of the measuring roller, the tensioning wheel and the locking wheel.

[0015] Optionally, in an embodiment of the present invention, a plurality of limiting rollers are arranged in the housing around the synchronous belt connecting ring, and the limiting rollers are rotatably matched with the outer edge of the synchronous belt connecting ring.

[0016] A second aspect of an embodiment of the present invention provides a PICC in vitro measurement method, which is applied to the PICC in vitro measurement mechanism as described in the first aspect, and the method comprises: step 1, measuring a first distance from a skin surface puncture point to a midpoint of a femoral vein by an ultrasonic probe, wherein the skin surface puncture point is a puncture position on the surface of the thigh, and the midpoint of the femoral vein is a center position of a cross section of the femoral vein as seen by the ultrasonic probe;

[0017] Step 2, measuring a second distance from the surface puncture point to the inguinal femoral artery pulsation point by a PICC in vitro measurement mechanism, wherein the inguinal femoral artery pulsation point is the inguinal femoral artery pulsation point position on the same side leg as the surface puncture point;

[0018] Step 3: Measure the third distance from the pulsation point of the inguinal femoral artery to the intersection of the left and right common iliac veins into the inferior vena cava (hereinafter referred to as the common iliac vein intersection) through the PICC in vitro measurement mechanism. The common iliac vein intersection is 2 cm below and 2 cm to the right of the navel when the human body is in an upright state;

[0019] Step 4: Measure the fourth distance from the intersection of the femoral artery and common iliac vein to the level of the xiphoid process using the PICC in vitro measurement mechanism.

[0020] The measurement of the first distance to the fourth distance is continuous measurement.

[0021] The skin insertion point, the pulsation point of the inguinal femoral artery, the intersection of the common iliac vein, and the measurement point at the level of the xiphoid process are all on the skin surface. The above measurement points are marked before measurement.

[0022] In the in vitro measurement method provided by the embodiment of the present invention, during in vitro measurement, the PICC in vitro measurement mechanism can be held by hand, and the measuring roller can be closely attached to the patient's skin, and then the housing can be held by hand to make the measuring roller roll on the patient's skin, and driven by the synchronous belt, the digital rolling ruler also starts to rotate, so that the distance of the measuring roller rolling can be accurately measured to measure the specific distance from the patient's PICC puncture point to the target position (for example, the patient's xiphoid process horizontal position). And when measuring, if the user controls the measuring roller to roll from the patient's puncture position to the target position, the user can press the external pressing part of the locking block so that the internal locking piece can be in close contact with the synchronous belt, so that the synchronous belt can be locked, and at this time the user can retract the measuring roller from the patient's skin and read the distance value on the digital rolling ruler. By setting the locking block, the rolling of the measuring roller in the process of reading the distance value can be avoided, so as to cause the read distance value to be inaccurate.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a PICC in vitro measurement mechanism and method, which can accurately measure the distance and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a PICC in vitro measurement mechanism according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal connections of the PICC in vitro measurement mechanism according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the matching structure of the digital rolling ruler and the limit roller of the present invention;

[0028] Figure 4 This is a schematic diagram of the matching structure of the digital rolling ruler and the connecting ring of the present invention;

[0029] Figure 5 It is a schematic diagram of the distribution of synchronous ridges on the connecting ring of the present invention;

[0030] Figure 6 This is a schematic diagram of the matching structure of the locking block and the locking wheel of the present invention;

[0031] Figure 7 A schematic diagram of a PICC in vitro measurement method of the present invention;

[0032] Figure 8 This is a schematic diagram of the measurement principle of the first distance in a PICC in vitro measurement method of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The terms “first”, “second”, etc. in the description and claims of the embodiments of the present invention are used to distinguish different objects rather than to describe a specific order of the objects.

[0035] In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "plurality" refers to two or more than two. For example, a plurality of elements refers to two elements or more than two elements.

[0036] The term "and / or" in this document is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, the display panel and / or backlight can represent: the display panel exists alone, the display panel and backlight exist at the same time, and the backlight exists alone. The symbol " / " in this document indicates that the associated objects are in an or relationship, for example, input / output means input or output.

[0037] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0038] The present invention provides a PICC in vitro measurement mechanism and method, the PICC in vitro measurement mechanism comprises a housing and a digital rolling ruler arranged in the housing; wherein the housing comprises a front end and a rear end, the front end is rotatably connected to a measuring roller, the measuring roller and the digital rolling ruler are connected through a synchronous belt transmission; the outer edge of the measuring roller extends out of the front end of the housing. The embodiment of the present invention can accurately measure the specific distance from the puncture position to the target position, so that the puncture can be performed accurately, further reducing the patient's discomfort

[0039] The PICC in vitro measurement mechanism provided by the embodiment of the present invention can be applied to the process of PICC puncture.

[0040] In the following, in conjunction with the accompanying drawings, a laser processing device and a laser processing method provided by an embodiment of the present invention are described in detail through specific embodiments and their application scenarios.

[0041] Please refer to Figures 1 to 8 The embodiment of the present invention provides a PICC in vitro measurement mechanism, which includes a housing 18 and a digital rolling ruler 1 installed in the housing 18, wherein the housing 18 includes a front end and a rear end, wherein the front end is rotatably mounted with a measuring roller 2, wherein the measuring roller 2 is connected to the digital rolling ruler 1 through a synchronous belt 19; and the outer edge of the measuring roller 2 extends out of the front end of the housing 18. The digital rolling ruler 1 is preferably a digital rolling ruler Rollova produced by HOZO Corporation of the United States. The diameter of the measuring roller 2 is 0.5 cm-2 cm, preferably 1 cm, and such a size facilitates the measuring roller 2 to roll on the surface of the human body, especially through the groin femoral artery pulsation point 26 and other locations where the skin surface has undulations, thereby improving the fit and the measurement accuracy.

[0042] Optionally, in an embodiment of the present invention, when measuring in vitro, the PICC in vitro measurement mechanism can be held by hand, and the measuring roller 2 can be made close to the patient's skin, and then the shell can be held by hand to make the measuring roller 2 roll on the patient's skin. Driven by the synchronous belt 19, the digital rolling ruler 1 also starts to rotate, so that the rolling distance of the measuring roller 2 can be accurately measured to measure the specific distance from the patient's PICC puncture point to the target position (for example, the patient's xiphoid level 28).

[0043] Optionally, in the embodiment of the present invention, combined with Figure 2 A tensioning wheel 3 is arranged between the digital rolling ruler 1 and the measuring roller 2, and the synchronous belt 19 cooperates with the tensioning wheel 3 for transmission.

[0044] It is understandable that the tensioning wheel 3 can be arranged to keep the synchronous belt 19 in a taut state, so that when the measuring roller 2 rolls, the digital rolling ruler 1 can be driven to roll quickly to accurately measure the distance.

[0045] Optionally, in the embodiment of the present invention, combined with Figure 5 The above-mentioned shell 18 is also rotatably connected to a locking wheel 4, and a locking pressure block 5 is connected to the edge of the shell 18 near the locking wheel 4. The locking pressure block 5 includes an external pressing portion 7, a connecting column 8 and an internal locking piece 9. The connecting column 8 is connected to a limit ring 10 that cooperates with the inner edge of the shell 18. A restoring spring 11 is compressed between the external pressing portion 7 and the outer edge of the shell 18. A through hole that cooperates with the connecting column 8 is opened on the shell 18; the internal locking piece 9 is in pressure contact with the locking wheel 4.

[0046] It can be understood that when measuring, if the user controls the measuring roller 2 to roll from the patient's puncture position to the target position, the user can press the external pressing portion 7 of the locking block 5 so that the internal locking piece 9 can be in close contact with the synchronous belt 19, thereby locking the synchronous belt 19. At this time, the user can retract the measuring roller 2 from the patient's skin and read the distance value on the digital rolling ruler 1. By setting the locking block 5, it is possible to avoid the measuring roller 2 rolling during the process of reading the distance value, thereby preventing the distance value from being read inaccurate.

[0047] Optionally, in the embodiment of the present invention, combined with Figure 4 and Figure 5 The outer edge of the digital rolling ruler 1 is provided with a synchronous belt 19 connecting ring 12, and the inner edge of the synchronous belt 19 connecting ring 12 is connected to the outer edge of the digital rolling ruler 1 through an adhesive layer 13; the synchronous belt 19 connecting ring 12 includes an inner ring body 14 and a synchronous belt 19 connecting groove 15 provided on the inner ring body 14, and the synchronous belt 19 connecting groove 15 is evenly distributed with synchronous ridges 16.

[0048] Optionally, in the embodiment of the present invention, synchronous ridges 16 are provided in the wheel grooves of the measuring roller 2 , the tensioning wheel 3 , and the locking wheel 4 .

[0049] Optionally, in the embodiment of the present invention, combined with Figure 2 and Figure 3 A plurality of limiting rollers 17 are arranged in the housing 18 around the connecting ring 12 of the synchronous belt 19 , and the limiting rollers 17 are rotatably matched with the outer edge of the connecting ring 12 of the synchronous belt 19 .

[0050] Figure 7 A PICC in vitro measurement method according to an embodiment of the present invention is shown. Figure 7 As shown, the PICC in vitro measurement method provided by the embodiment of the present invention includes the following steps:

[0051] The measuring points at the skin surface insertion point 24, the inguinal femoral artery pulsation point 26, the common iliac vein intersection 27, and the xiphoid process level 28 are all on the skin surface and are marked before measurement.

[0052] Step 1: Use an ultrasonic probe to measure a first distance 20 from a skin surface puncture point 24 to a midpoint 25 of a femoral vein. The skin surface puncture point 24 is a puncture position on the surface skin of the thigh. The midpoint 25 of the femoral vein is the center of the cross section of the femoral vein seen when the ultrasonic probe is placed on the surface skin of the thigh puncture point. The actual distance between the skin surface puncture point 24 and the center of the femoral vein measured by the ultrasonic probe is the first distance 20. In the embodiment of the present invention, since the conditions of the puncture site of different patients (such as the fat thickness and the course of the vein at the puncture site) may be different, the fat thickness of the patient can be accurately measured by an ultrasonic probe, so that the puncture depth can be determined according to the fat thickness to accurately perform the puncture. The ultrasonic probe measurement is preferably implemented using a SITE-RITE 5 vascular ultrasound instrument produced by Bard Corporation of the United States.

[0053] Step 2, measuring a second distance 21 from the surface puncture point to the inguinal femoral artery pulsation point 26 by a PICC in vitro measurement mechanism, wherein the inguinal femoral artery pulsation point 26 is the position of the inguinal femoral artery pulsation point 26 on the same side of the leg as the surface puncture point;

[0054] Step 3, using the PICC in vitro measurement mechanism to measure a third distance 22 from the inguinal femoral artery pulsation point 26 to the point where the left and right common iliac veins meet to form the inferior vena cava (hereinafter referred to as the common iliac vein intersection 27), the iliac vein intersection being 2 cm below and 2 cm to the right of the navel 29 when the human body is in an upright state;

[0055] Step 4: Measure the fourth distance 23 from the common iliac vein intersection 27 to the xiphoid process level 28 by using the PICC in vitro measurement mechanism.

[0056] The measurement of the first distance 20 to the fourth distance 23 is continuous measurement.

[0057] In specific operation, the housing 18 is held in hand, and the measuring roller 2 is placed close to the skin surface. The measuring points of the skin surface insertion point 24, the inguinal femoral artery pulsation point 26, the iliac vein intersection 27, and the xiphoid process level 28 are rolled in sequence. The measuring roller 2 drives the roller of the digital rolling ruler 1 to roll synchronously. The second distance 21, the third distance 22, and the fourth distance 23 are accumulated on the digital rolling ruler 1 and added to the first distance 20 to obtain the final PICC catheter length. Since the entire measurement takes into account the fat muscle thickness of the thigh and measures according to the flow direction of the femoral vein, the measurement accuracy is greatly improved.

[0058] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0059] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A PICC in vitro measurement method, characterized in that: Applicable to a PICC in vitro measurement mechanism, the PICC in vitro measurement mechanism comprises: A housing and a digital rolling ruler disposed in the housing; The housing comprises a front end and a rear end, the front end is rotatably connected to a measuring roller, the measuring roller is connected to the digital rolling ruler via a synchronous belt transmission; the outer edge of the measuring roller extends out of the front end of the housing; A tensioning wheel is also arranged between the digital rolling ruler and the measuring roller, and the synchronous belt cooperates with the tensioning wheel for transmission; The housing is also rotatably connected to a locking wheel, and a locking pressure block is connected to the edge of the housing near the locking wheel. The locking pressure block includes an external pressing portion, a connecting column and an internal locking sheet. The connecting column is connected to a limiting ring that matches the inner edge of the housing. A restoring spring is compressed between the external pressing portion and the outer edge of the housing. A through hole that matches the connecting column is provided on the housing; the internal locking sheet is in pressure contact with the locking wheel; The outer edge of the digital rolling ruler is provided with a synchronous belt connecting ring, and the inner edge of the synchronous belt connecting ring is connected to the outer edge of the digital rolling ruler through an adhesive layer; the synchronous belt connecting ring includes an inner ring body and a synchronous belt connecting groove provided on the inner ring body, and synchronous ridges are evenly distributed in the synchronous belt connecting groove; The wheel grooves of the measuring roller, the tensioning wheel and the locking wheel are all provided with synchronous ridges; A plurality of limiting rollers are arranged in the housing around the synchronous belt connecting ring, and the limiting rollers are rotatably matched with the outer edge of the synchronous belt connecting ring; The PICC in vitro measurement method comprises: Step 1: measuring a first distance from a skin surface puncture point to a midpoint of a femoral vein by an ultrasonic probe, wherein the skin surface puncture point is a puncture position on the surface of the thigh, and the midpoint of the femoral vein is a center position of a cross section of the femoral vein as seen by the ultrasonic probe; Step 2, measuring a second distance from the surface puncture point to the inguinal femoral artery pulsation point by a PICC in vitro measurement mechanism, wherein the inguinal femoral artery pulsation point is the inguinal femoral artery pulsation point position on the same side leg as the surface puncture point; Step 3: Measure the third distance from the groin femoral artery pulsation point to the common iliac vein intersection through the PICC in vitro measurement mechanism. The common iliac vein intersection is 2 cm below and 2 cm to the right of the navel when the human body is in an upright state. Step 4, measuring the fourth distance from the common iliac vein intersection position to the xiphoid process level by using the PICC in vitro measurement mechanism; The measurement of the first distance to the fourth distance is continuous measurement; The skin insertion point, the pulsation point of the inguinal femoral artery, the intersection of the common iliac vein, and the measurement point at the level of the xiphoid process are all on the skin surface. The above measurement points are marked before measurement.

Images