A full pre-printed anatomic ruler visual positioning sterile drape

Abstract

The utility model discloses a full preprinting dissection scale visual positioning aseptic hole towel, including basic grid layer and transparent protective layer. The surface preprinting body surface projection scale, lateral iliac crest highest point connecting line, longitudinal spinal cord midline and puncture window are projected on the basic grid layer, and the lateral iliac crest highest point connecting line and longitudinal spinal cord midline are perpendicular and intersect in the basic grid layer midpoint, and the puncture window circle center coincides with it. The transparent protective layer covers the surface of basic grid layer. The doctor can observe the matching degree of body surface sign and preprinting scale through the transparent protective layer, adjusts the puncture window position in real time, ensures accurate positioning, only needs to align preprinting scale and patient body surface sign, can lock the puncture window fast, shortens the operation time. The scale directly marks the body surface projection, and does not need to palpate the deep structure. When the spinous process gap deviates, can observe and adjust the path in the puncture window range, avoids blind puncture, and improves the operation safety and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary positioning device technology, and in particular to a pre-printed anatomical ruler for visual positioning of sterile drape. Background Technology

[0002] Lumbar puncture is an indispensable diagnostic and treatment procedure in neurology, anesthesiology, and emergency medicine, playing a crucial role in cerebrospinal fluid analysis, intrathecal drug administration, and the diagnosis of central nervous system diseases. However, the traditional method of lumbar puncture localization relies heavily on the physician's subjective experience, determining the puncture point by palpating anatomical landmarks (such as the line connecting the highest points of the bilateral iliac crests and the interspinous spaces of the spine), which has significant limitations.

[0003] In obese patients, an excessively thick subcutaneous fat layer makes it difficult to palpate the iliac crest and spinous processes of the spine, significantly increasing the localization error rate. In patients with spinal deformities (such as scoliosis and ankylosing spondylitis) or elderly patients with osteoporosis, anatomical landmarks may shift, become blurred, or even disappear, requiring repeated adjustments to the puncture angle, which leads to prolonged operation time, increased patient pain, and increased risk of complications such as epidural hematoma and nerve root injury.

[0004] Furthermore, traditional methods rely entirely on physician experience and lack objective, quantifiable standards. Novice or junior physicians have low first-time puncture success rates, and mastering positioning techniques requires extensive clinical practice, resulting in high training costs. While some studies have proposed ultrasound-guided or X-ray-guided lumbar puncture assistance, these methods require additional equipment, are complex and costly, may damage sterile areas, increase infection risks, and have low adoption rates in primary healthcare institutions, failing to fundamentally solve the problem of standardized positioning. Utility Model Content

[0005] The purpose of this invention is to disclose a sterile drape, which has a body surface projection scale, a line connecting the highest points of the transverse iliac crests and a longitudinal midline of the spine set in the basic grid layer, so as to replace subjective palpation with an objective scale and eliminate positioning deviations caused by individual differences.

[0006] To achieve the above objectives, this utility model discloses a pre-printed anatomical scale visualization positioning sterile drape, comprising: a basic mesh layer, the surface of which is provided with a body surface projection scale, a line connecting the highest points of the transverse iliac crests, a longitudinal midline of the spine, and a puncture window, wherein the line connecting the highest points of the transverse iliac crests and the longitudinal midline of the spine intersect perpendicularly at the midpoint of the basic mesh layer, and the center of the puncture window coincides with the midpoint of the basic mesh layer; and a transparent protective layer covering the surface of the basic mesh layer.

[0007] By adopting the above scheme, combined with the transparent protective layer design, doctors can directly observe the matching degree between the surface landmarks and the pre-printed ruler, and adjust the position of the puncture window in real time to ensure accurate positioning of the puncture point. Doctors only need to align the pre-printed ruler on the perforated drape with the patient's surface landmarks to quickly lock the position of the puncture window, greatly shortening the operation time. The ruler directly marks the surface projection, eliminating the need to palpate deep anatomical structures. Even if the subcutaneous fat layer is thicker than 3 cm, the puncture point can still be determined by the relative position of the ruler and the surface landmarks. Even if the actual interspinous space deviates, doctors can still observe and adjust the path within the puncture window area through the transparent layer, avoiding blind puncture.

[0008] Furthermore, a scale is provided on the longitudinal midline of the spine, the scale range is 0-30cm, and the graduation value is 1cm.

[0009] By adopting the above method, the total length of the spinal midline can be quickly measured through longitudinal scale, which helps doctors determine the actual location of the target puncture gap.

[0010] Furthermore, multiple body surface projection scales are provided, each of which is parallel and spaced apart, and each of the body surface projection scales is parallel to the longitudinal midline of the spine.

[0011] By adopting the above approach, multiple parallel scales provide multiple sets of reference lines, allowing doctors to cross-verify and pinpoint a more precise puncture location, thus avoiding misjudgment. In patients with spinal deformities, the spinal midline may be offset or curved. The parallel scales can mark surface projections at different heights, assisting doctors in determining the actual location of the target interspace and avoiding puncture deviations caused by midline offset.

[0012] Furthermore, the body surface projection scale is provided with points L1, L2, L3, L4 and L5, wherein each L4 point on the body surface projection scale is collinear and coincides with the line connecting the highest point of the transverse iliac crest.

[0013] By adopting the above approach, anatomical theory can be transformed into a visual operational benchmark. Regardless of the patient's body type, the physician only needs to ensure that the line connecting the iliac crests is collinear with L4 on the drape to quickly locate the theoretical projection position of the L4 spinous process, and then calculate the L3-L4 or L4-L5 interspace. Traditional methods rely on the physician's palpation of the iliac crest and spinous process, which is prone to errors due to excessive subcutaneous fat or anatomical variations. The forced alignment of the L4 point with the iliac crest line replaces subjective judgment with an objective benchmark, significantly reducing positioning errors.

[0014] Furthermore, each of the said body surface projection scales is scaled and arranged proportionally.

[0015] By adopting the above scheme, clear quantitative standards are provided, which facilitates the statistical analysis of differences in puncture parameters among patients of different body types, ages, or diseases, and provides a basis for optimizing drape design or operating procedures.

[0016] Furthermore, the diameter of the puncture window is 10cm, and the length of the basic grid layer is 60cm and the width is 50cm.

[0017] By adopting the above scheme, the 10cm diameter puncture window can completely cover the target gap and the surrounding 2-3cm safe operating area, avoiding the instrument from colliding with the spine or nerve root due to the puncture window being too small; the 60cm×50cm grid layer can completely cover the back and extend to the iliac crest, ensuring that key landmarks such as the iliac crest line and spinous process are always within the range of vision.

[0018] Furthermore, the transparent protective layer is a transparent PE protective film.

[0019] By adopting the above method, the light transmittance of the transparent PE protective film exceeds 90%, allowing doctors to clearly observe the skin condition at the puncture site through the film, such as whether there is redness, swelling, or bleeding. They can also observe the insertion path of the puncture needle and the outflow of cerebrospinal fluid, thus avoiding misoperation caused by blind puncture.

[0020] Furthermore, the transparent protective layer may be one or two layers. When one layer is provided, the transparent protective layer is located on one side of the base grid layer where the body surface projection scale, the line connecting the highest points of the transverse iliac crest, and the longitudinal midline of the spine are set. When two layers of the transparent protective layer are provided, the transparent protective layer is located on both sides of the base grid layer.

[0021] By adopting the above scheme, the transparent protective layer is placed on one side of the positioning mark, which can protect the scale. When a double transparent protective layer is set, the inner film is closely attached to the base grid layer, and the outer film covers it, forming double protection to prevent blood and cerebrospinal fluid from penetrating into the base grid layer.

[0022] Furthermore, a fixing sticker is provided on the side of the basic mesh layer or the transparent protective layer facing the human body.

[0023] By adopting the above method, setting a fixing patch can improve the stability of the drape, thereby ensuring the stability after puncture and positioning, maintaining the initial position of the drape, and avoiding positioning errors caused by re-laying the drape.

[0024] Furthermore, the body surface projection scale, the line connecting the highest points of the transverse iliac crests, and the longitudinal midline of the spine are made of alcohol-resistant materials.

[0025] By adopting the above solution, the surface of the alcohol-resistant material is smooth, making it less likely to leave disinfectant or blood residue, thus reducing the risk of bacterial growth. During multiple punctures or long surgeries, the markings can remain clear, avoiding repeated disinfection or drape replacement due to blurred markings after disinfection.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By using pre-printed scales such as the body surface projection scale, the line connecting the highest points of the transverse iliac crest, and the longitudinal midline of the spine, the traditional palpation positioning that relies on the doctor's experience is transformed into a visual and quantifiable objective standard, eliminating positioning deviations caused by individual differences. Even if the patient has obscure anatomical landmarks such as obesity, spinal deformity, or osteoporosis, the puncture point can still be accurately determined by the relative position of the scale and the body surface landmarks, significantly reducing the error rate. 2. Doctors can observe the matching degree between the body surface landmarks and the pre-printed scale in real time through the transparent protective layer. If the actual spinous process space is found to be misaligned, the puncture angle can be flexibly adjusted within the puncture window range to avoid complications such as epidural hematoma and nerve root damage caused by blind puncture. 3. Doctors only need to align the pre-printed ruler on the drape with the patient's body surface markers to quickly locate the puncture window position without repeated palpation or marking. The preparation time for a single puncture can be shortened by 3-5 minutes, which is especially suitable for emergency scenarios. 4. The pre-printed ruler design avoids repeated marking or adjustment of the drape position during surgery, reducing the possibility of contamination of the sterile area; at the same time, the transparent protective layer can prevent blood or disinfectant from seeping into the basic mesh layer, further reducing the risk of infection; through precise positioning and dynamic adjustment of the puncture path, the incidence of complications such as epidural hematoma and nerve root injury caused by blind puncture can be significantly reduced, improving the safety of the operation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Fig. 1 This is a schematic diagram of the planar structure of an embodiment of the present utility model; Fig. 2 This is a schematic diagram of the body surface projection scale structure of an embodiment of the present utility model; Fig. 3 This is a cross-sectional structural diagram of an embodiment of the present utility model.

[0029] Key reference numerals: 1. Basic grid layer; 11. Body surface projection scale; 12. Line connecting the highest points of the transverse iliac crest; 13. Longitudinal midline of the spine; 131. Scale; 14. Puncture window; 2. Transparent protective layer; 3. Fixation tape. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0035] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0036] See Embodiment 1 of this utility model. Figs. 1 to 3 As shown, a pre-printed anatomical scale visualization positioning sterile drape is provided, including a basic mesh layer 1 and a transparent protective layer 2. The basic mesh layer 1 can be made of medical non-woven fabric with a mesh size of 1cm × 1cm. The surface is printed with the following markings using black alcohol-resistant ink: longitudinal spinal midline 13, transverse line connecting the highest points of the iliac crests 12, and a body surface projection scale 11. The longitudinal spinal midline 13 is centered along the long axis of the drape and is marked with a 0-30cm scale line 131, with a graduation value of 1cm. The total length of the spinal midline can be quickly measured through the longitudinal scale 131, assisting doctors in determining the actual location of the target puncture space. The line 12 connecting the highest points of the transverse iliac crests is perpendicular to the longitudinal midline of the spine 13 and intersects it at the midpoint of the drape. It is marked with "L4 horizontal" arrows on both sides. The surface projection scale 11 is based on the line connecting the transverse iliac crests and extends towards the cephalic and caudal sides with L1-L5 interspinous space markings, so that L1, L2, L3, L4 and L5 points are set on the surface projection scale 11. Among them, each L4 point on the surface projection scale 11 is collinear and coincides with the line connecting the highest points of the transverse iliac crests 12.

[0037] In some embodiments, multiple surface projection scales 11 are provided, with multiple parallel scales providing multiple sets of reference lines. Doctors can use cross-verification to lock in a more precise puncture location and avoid misjudgment. In patients with spinal deformities, the spinal midline may be offset or curved. The parallel scales can mark surface projections at different heights to help doctors determine the actual location of the target gap and avoid puncture deviations caused by midline offset. Each surface projection scale 11 is parallel and spaced apart, and each surface projection scale 11 is parallel to the longitudinal spinal midline 13. Each surface projection scale 11 is scaled proportionally to the average interspinous distance of Asian adults, for example, L4-L5 distance 1.5cm, L3-L4 distance 2cm. This can transform anatomical theory into a visual operational benchmark. Regardless of the patient's body type, doctors only need to ensure that the iliac crest line is collinear with L4 on the drape to quickly lock in the theoretical projection position of the L4 spinous process, and then calculate the L3-L4 or L4-L5 gap. Traditional methods rely on doctors to palpate the iliac crest and spinous process, which is prone to errors due to excessive subcutaneous fat or anatomical variations. The forced alignment of the L4 point with the iliac crest, using an objective scale to replace subjective judgment, significantly reduces positioning bias.

[0038] A puncture window 14 is provided in the center of the basic mesh layer 1. The puncture window 14 has a circular opening with a diameter of 10cm. The 10cm diameter puncture window 14 can completely cover the target gap and the surrounding 2-3cm safe operating area, avoiding the risk of instruments colliding with the spine or nerve roots due to the puncture window 14 being too small. The center of the puncture window 14 coincides with the midpoint of the perforated drape. The line 12 connecting the highest points of the transverse iliac crest and the longitudinal midline of the spine 13 intersects perpendicularly at the midpoint of the basic mesh layer 1. The center of the puncture window 14 coincides with the midpoint of the basic mesh layer 1. The transparent protective layer 2 covers the surface of the basic mesh layer 1 and is made of 0.1mm thick transparent PE film with a light transmittance ≥90%. With the design of the transparent protective layer 2, doctors can directly observe the matching degree between the surface landmarks and the pre-printed ruler, and adjust the position of the puncture window 14 in real time to ensure accurate positioning of the puncture point. Doctors only need to align the pre-printed ruler on the perforated drape with the patient's surface landmarks to quickly lock the position of the puncture window 14, greatly shortening the operation time. The ruler directly marks the surface projection, eliminating the need to palpate deep anatomical structures. Even if the subcutaneous fat layer is thicker than 3 cm, the puncture point can still be determined by the relative position of the ruler and the surface landmarks. Even if the actual interspinous space is offset, doctors can still observe and adjust the path within the puncture window 14 through the transparent layer, avoiding blind puncture.

[0039] In this embodiment 1, the basic mesh layer 1 is 60cm long and 50cm wide. The 60cm×50cm mesh layer can completely cover the back and extend above the iliac crest, ensuring that key landmarks such as the iliac crest line and spinous process are always within the visible range.

[0040] It should be noted that in various embodiments, the transparent protective layer 2 is a transparent PE protective film with a light transmittance of over 90%. Doctors can clearly observe the skin condition at the puncture site through the film, such as whether there is redness, swelling, or bleeding. They can also observe the insertion path of the puncture needle and the outflow of cerebrospinal fluid, thus avoiding misoperation caused by blind puncture.

[0041] Optionally, the transparent protective layer 2 can be one or two layers. When one layer is provided, the transparent protective layer 2 is located on one side of the base grid layer 1 where the body surface projection scale 11, the line connecting the highest points of the transverse iliac crests 12, and the longitudinal midline of the spine 13 are set. Placing the transparent protective layer 2 on the side of the positioning marker can protect the scale and reduce wear. When two layers of the transparent protective layer 2 are provided, the transparent protective layer 2 is located on both sides of the base grid layer 1. The inner membrane is tightly attached to the base grid layer 1, and the outer membrane covers it, forming double protection to prevent blood and cerebrospinal fluid from penetrating into the base grid layer 1.

[0042] In various embodiments, to facilitate the fixation of the sterile drape structure, a fixing patch 3 is provided on the side of the basic mesh layer 1 or the transparent protective layer 2 facing the human body. The fixing patch 3 is a medical pressure-sensitive adhesive patch, located at the four corners and / or edges of the drape. This ensures stability after puncture positioning, maintains the initial position of the drape, and avoids positioning errors caused by re-draping.

[0043] In some embodiments, the body surface projection scale 11, the line connecting the highest points of the transverse iliac crests 12, and the longitudinal midline of the spine 13 are made of alcohol-resistant material, namely polyurethane-based alcohol-resistant ink. After printing, it is UV-cured. The marked area is repeatedly wiped 10 times with a 75% medical alcohol cotton ball at a pressure of 300g. The marking does not become blurred or fall off, and it is not easy to leave disinfectant or blood residue, reducing the risk of bacterial growth. During multiple punctures or long-term surgeries, the marking can remain clear, avoiding repeated disinfection or drape replacement due to blurred markings after disinfection.

[0044] The operation steps of this utility model are as follows: Preoperative preparation: The patient is placed in the standard lateral decubitus position with the spine flexed to expose the lumbosacral region; the surgeon palpates the highest point of the bilateral iliac crests to confirm their location on the body surface.

[0045] Draping and initial positioning: Unfold the drape so that the transparent protective layer 2 faces the surgical field, and align the midpoint of the drape with the patient's lumbosacral region; adjust the position of the drape so that the printed line 12 connecting the highest points of the transverse iliac crests coincides with the actual iliac crest line of the patient, and press the four corner fixing tapes 3 to secure the drape.

[0046] Interspinous space location: Determine the target puncture space L3-L4 or L4-L5 based on the body surface projection scale 11. Cephalad positioning: Measure 2cm upward from the transverse iliac crest line, corresponding to the L3-L4 interspace; Caudal positioning: Measure 1.5cm downwards, corresponding to the L4-L5 interspace; palpate the spinous process of the target area through the transparent PE membrane. If the actual position of the spinous process is found to be off, such as in scoliosis, adjust the puncture point in the direction of the offset according to the scale mark, with the error range controlled within ±0.5cm.

[0047] During the puncture procedure, disinfect the puncture window 14 area with an alcohol swab to prevent the alcohol-resistant ink markings from being wiped away. Using the longitudinal midline of the spine 13 as a reference, insert the puncture needle vertically along the midline. The insertion depth is referenced to the longitudinal scale line 131. For example, for obese patients, the insertion depth is 4-5cm, corresponding to scale line 1314-5. Observe the cerebrospinal fluid outflow through the transparent PE membrane to avoid over-puncture.

[0048] Special cases: Obese patients: Directly locate the puncture point according to the scale marking. If the subcutaneous fat thickness is >3cm, select a puncture needle length ≥9cm and refer to the longitudinal scale line 131 for the needle insertion depth. Patients with scoliosis: Verify the puncture point by using multiple parallel surface projection scales 11, such as auxiliary scales 2cm to the left and right of the midline. If the L4 spinous process is deviated 1cm to the right, adjust the puncture point 1cm to the left.

[0049] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By using pre-printed scales such as the body surface projection scale 11, the line connecting the highest points of the transverse iliac crest 12, and the longitudinal midline of the spine 13, the traditional palpation positioning that relies on the doctor's experience is transformed into a visual and quantifiable objective standard, eliminating positioning deviations caused by individual differences. Even if the patient has obscured anatomical landmarks such as obesity, spinal deformity, or osteoporosis, the puncture point can still be accurately determined by the relative position of the scale and the body surface landmarks, significantly reducing the error rate. 2. Doctors can observe the matching degree between the body surface landmarks and the pre-printed scale in real time through the transparent protective layer 2. If the actual spinous process space is found to be deviated, the puncture angle can be flexibly adjusted within the puncture window 14 to avoid complications such as epidural hematoma and nerve root damage caused by blind puncture. 3. Doctors only need to align the pre-printed ruler on the drape with the patient's body surface markers to quickly locate the puncture window 14 position without repeated palpation or marking. The preparation time for a single puncture can be shortened by 3-5 minutes, which is especially suitable for emergency scenarios. 4. The pre-printed ruler design avoids repeated marking or adjustment of the drape position during the operation, reducing the possibility of contamination of the sterile area; at the same time, the transparent protective layer 2 can prevent blood or disinfectant from seeping into the basic mesh layer 1, further reducing the risk of infection; through precise positioning and dynamic adjustment of the puncture path, the incidence of complications such as epidural hematoma and nerve root injury caused by blind puncture can be significantly reduced, improving the safety of the operation.

[0050] The above provides a detailed description of a pre-printed anatomical ruler-based visual positioning sterile drape disclosed in the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the pre-printed anatomical ruler-based visual positioning sterile drape and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pre-printed anatomical scale-based visual positioning sterile drape, characterized in that, include: A basic grid layer (1) is provided with a body surface projection scale (11), a transverse iliac crest highest point connection line (12), a longitudinal spinal midline (13) and a puncture window (14) on its surface. The transverse iliac crest highest point connection line (12) and the longitudinal spinal midline (13) intersect perpendicularly at the midpoint of the basic grid layer (1). The center of the puncture window (14) coincides with the midpoint of the basic grid layer (1). A transparent protective layer (2) covers the surface of the base mesh layer (1).

2. The pre-printed anatomical scale visualization positioning sterile drape according to claim 1, characterized in that, The longitudinal midline of the spine (13) is provided with a scale (131), the scale (131) ranges from 0 to 30 cm, and the division value is 1 cm.

3. The pre-printed anatomical scale visualization positioning sterile drape according to claim 1, characterized in that, Multiple body surface projection scales (11) are provided, each of which is parallel and spaced apart, and each of which is parallel to the longitudinal midline of the spine (13).

4. The pre-printed anatomical scale visualization positioning sterile drape according to claim 3, characterized in that, The body surface projection scale (11) is provided with points L1, L2, L3, L4 and L5. Among them, the L4 points on each body surface projection scale (11) are collinear and coincide with the line (12) connecting the highest point of the transverse iliac crest.

5. The pre-printed anatomical scale visualization positioning sterile drape according to claim 4, characterized in that, Each of the aforementioned body surface projection scale bars (11) is scaled proportionally.

6. The pre-printed anatomical scale visualization positioning sterile drape according to claim 1, characterized in that, The diameter of the puncture window (14) is 10cm, and the length of the basic grid layer (1) is 60cm and the width is 50cm.

7. The pre-printed anatomical ruler-based visual positioning sterile drape according to claim 1, characterized in that, The transparent protective layer (2) is a transparent PE protective film.

8. The pre-printed anatomical scale visualization positioning sterile drape according to claim 1, characterized in that, The transparent protective layer (2) is one or two layers. When one layer is set, the transparent protective layer (2) is located on one side of the basic grid layer (1) where the body surface projection scale (11), the line connecting the highest points of the transverse iliac crest (12), and the longitudinal midline of the spine (13) are set. When two layers are set, the transparent protective layer (2) is located on both sides of the basic grid layer (1).

9. A pre-printed anatomical scale visualization positioning sterile drape according to any one of claims 1-8, characterized in that, The basic mesh layer (1) or the transparent protective layer (2) has a fixing sticker (3) on the side facing the human body.

10. A pre-printed anatomical ruler-based visual positioning sterile drape according to claim 1, characterized in that, The body surface projection scale (11), the line connecting the highest points of the transverse iliac crest (12), and the longitudinal midline of the spine (13) are made of alcohol-resistant material.

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