JP2006218096A - Fabric cover for ophthalmic operation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fabric cover for an ophthalmic operation for which the operation of sticking it without generating a gap around an operation field opening hole can be easily performed. <P>SOLUTION: The fabric cover for the ophthalmic operation is constituted of a fabric cover main body 21 largely covering a patient and an opening hole peripheral edge part 17 around the operation field opening hole, and is structured such that an adhesive material layer 19 is provided on the entire surface on the skin side of the peripheral edge part 17. The peripheral edge part 17 is composed of a polyurethane film excellent in stretchability and flexibility. The peripheral edge part 17 is stretched well, follows recessed and projected parts around an eye excellently and easily, and can be adhered and stuck easily. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ophthalmic surgical covering used for ophthalmic surgery and the like.

  During surgery, it is common practice to cover the body surface other than the surgical field with drape for the purpose of keeping the surgical field sterile. For example, when performing eye surgery such as cataract treatment surgery, An ophthalmic surgical covering (for example, a 90 cm × 90 cm or 120 cm × 120 cm non-woven fabric) having a corresponding hole opened is used. When using this covering cloth, generally align the opening of the covering cloth with the eye part of the patient who is supine on the operating table, and fix it by sticking around the eye with a double-sided adhesive tape attached to the periphery of the opening. To do.

  By the way, the eyes have complex indentations that are continuous with the nose, forehead, temples, and cheekbones. The part may lift and peel off during surgery. If there are gaps in the tape-applied portion in this way, the cleaning liquid or blood during the operation may leak from the gap to the inside (skin side) of the covering cloth.

  Therefore, it is desirable that the double-sided adhesive tape adheres strongly to the skin. However, if the adhesive tape is too strong, it may cause damage to the patient when the cover is removed after surgery, or the skin surface may be peeled off. There is a risk of giving. Especially in the case of elderly people, the skin is fragile, and it is a problem that the adhesive strength is too strong.

  The skin condition varies from patient to patient. In some patients, double-sided adhesive tapes are difficult to adhere to the skin, and gaps are created at other locations, while other patients adhere strongly even when similar adhesive tapes are used. In some cases, the skin may be damaged when it is peeled off.

Therefore, as a solution to the above problem, an ophthalmic surgical covering cloth in which a thick gel-like adhesive layer is provided on the back side of the peripheral edge of the surgical field opening of the covering cloth has been proposed (see Patent Document 1). . In this covering cloth, since the restoring force of the covering cloth is absorbed by the expansion and contraction of the thick gel-like pressure-sensitive adhesive layer, it is not easily peeled off during the operation. Moreover, since it does not peel off easily as described above, a material having a relatively low adhesive strength can be used as the gel-like pressure-sensitive adhesive layer, and there is an effect that the skin is hardly damaged when peeling off after the operation.
JP 2003-325544 A

  As described above, according to the covering cloth of Patent Document 1, it can be attached to the periphery of the opening exactly. However, the cause of leakage of the cleaning liquid or the like from the attaching portion to the skin side is the above-described covering. In addition to the lifting of the concave portion due to the restoring force of the cloth, it may be due to a sticking failure during the sticking operation. That is, as described above, since the eye has complicated irregularities, the covering cloth is likely to be wrinkled at the time of application, and therefore a gap is left if not applied carefully.

  Accordingly, an object of the present invention is to provide an ophthalmic surgical covering cloth that can be easily attached without causing a gap around the opening.

  An ophthalmic surgical covering according to the present invention is an ophthalmic surgical covering provided with an opening corresponding to an ophthalmic surgical field, and the peripheral edge of the opening is attached to the skin, and at least the peripheral edge is polyurethane. It is comprised by the film, The adhesive layer was provided in the skin side surface of this polyurethane film, It is characterized by the above-mentioned. In the present specification and claims, a sheet is included when referred to as a film, and a film is included when referred to as a sheet.

  In the past, only holes or holes were made in the cloth or sheet used for the covering cloth, and the periphery of the opening was the same material as the other parts of the covering cloth and was difficult to stretch. It was difficult to follow the unevenness of the and it was easy to become a habit. However, in the present invention, as described above, a polyurethane film is used at the peripheral edge of the aperture, and since this polyurethane film is a material that is flexible and stretches well, it is necessary to apply it to uneven portions such as around the eyes. It can be applied while extending along the unevenness, so that the wrinkles are not easily moved and can be easily applied without generating a gap. In addition, the sticking to the skin is made by the pressure-sensitive adhesive layer provided on the skin side surface of the polyurethane film.

  Further, as described above, the polyurethane film is a material that stretches well, and since the lifting force due to the restoring force is small, it is difficult for the polyurethane film to lift and float.

  In addition, the polyurethane film has good stretchability, and when it is removed after being pasted, the stretched portion contracts when it is first pasted and returns to its original state, so that it can be pasted again. That is, for example, in the case of a polyolefin film, once it is stretched, it remains stretched and does not shrink. Therefore, when the film is reapplied, the stretched portion may become wrinkles. On the other hand, if it is a polyurethane film as mentioned above, it can reapply, without producing a wrinkle.

  As such a polyurethane film, the tensile stress at 100% elongation (according to JIS K 7311) in the MD direction (the production flow direction of the film) and the TD direction (the direction perpendicular to the MD direction) is 8.0 MPa or less, It is preferable that the elongation at break (according to JIS K 7311) is 500% or more.

  If the tensile stress of the film is too high, it will require force when affixing to the skin, and it will have poor ability to follow the irregularities around the heel, and if the elongation at break is too low, it may break when stretched. If it is a polyurethane film that exhibits tensile stress and elongation at break as described above, it will stretch well with a weak force, so that it can be applied to the skin very easily and has good conformity to irregularities. And with sufficient strength. The tensile stress at 100% elongation is the stress when 100% elongation is given to the test piece, and the tensile elongation at break is the distance between the marked lines when the test piece is pulled and broken. It is the rate of elongation when

  The tensile strength (according to JIS K7311) of the polyurethane film is preferably 50 MPa or more. This is because if it is 50 MPa or more, there is almost no fear that the polyurethane film will be broken during the sticking operation or the like.

  The pressure-sensitive adhesive layer is preferably one that has little irritation to the patient's skin and can flexibly follow the uneven shape around the heel and the heel. And as the adhesive strength of the pressure-sensitive adhesive layer is high, it is preferable because it is difficult to peel off, but if the adhesive strength is too high, there is a concern that it may damage the skin when peeling from the skin after surgery, so use a strong one Can not. In this respect, if it is provided on a polyurethane film as in the present invention, it is difficult to cause the film to stretch well and the concave portion is lifted and floated as described above. Adhesive strength (peeling strength) can be obtained even if one is used (for example, 180-degree peeling adhesive strength is 0.9 to 2.5 N / 25 mm (measurement method: JIS Z 0237, test plate; bakelite panel)) Secured and not easily peeled off during surgery. Therefore, it is possible to use an adhesive layer having a weak adhesive force adapted to a patient with relatively weak skin, and skin damage at the time of peeling the covering after the operation can be considerably prevented.

  The pressure-sensitive adhesive strength of the pressure-sensitive adhesive layer (according to JIS Z 0237 180-degree peeling pressure measurement method) is preferably 0.9 to 2.5 N / 25 mm. If an adhesive layer having the above adhesive strength is used as a pressure-sensitive adhesive layer provided on a polyurethane film, it does not easily come off during surgery, and hardly hurts the skin when peeled off.

  Further, the holding force of the pressure-sensitive adhesive layer ((shift length) according to JIS Z 0237 (attached area 12 mm × 20 mm, left at a load of 200 g for 30 minutes)) is preferably 0.1 to 0.5 mm. If it has this level of holding power, the polyurethane film once attached to the periphery of the heel rarely shifts during the operation.

  The thickness of the pressure-sensitive adhesive layer is preferably 20 to 50 μm. If it is this thickness, adhesive force is fully ensured, and when removing a cover cloth after an operation, it is hard to produce the adhesive residue to the skin resulting from throwing destruction. Of these, about 30 μm ± 10% is recommended.

  Furthermore, in the ophthalmic surgical covering according to the present invention, the polyurethane film is preferably transparent or translucent. When pasting the peripheral edge of the opening of the cover cloth to the skin, the state of sticking to the skin is not known in the past, so a gap such as a float is left, and from this gap the cleaning liquid at the time of surgery etc. When the polyurethane film is transparent or translucent as described above, the adhesive state of the adhesive layer on the skin can be easily visually checked from the front side (anti-skin side). Therefore, when a portion where a gap is generated is found, it is possible to close it by firmly sticking it by pressing it.

  As such a polyurethane film, the total light transmittance (according to JIS K 7105) is 60 to 80%, and the diffuse transmittance (haze value) in the total transmitted light (according to JIS K 7105) is 60 to 85%. It is preferable that This is because if the total light transmittance is 60 to 80%, there is a transparency to the extent that the sticking state can be sufficiently confirmed through the film from the front side (anti-skin side). Further, if the haze value is 60 to 85%, the polyurethane film becomes dull and unnoticeable, and it can be expected to improve the visibility of the surgical field in contrast to this.

  In addition, the surface gloss of the anti-skin side surface of the polyurethane film is preferably around 20%. If it is around 20%, there is not much gloss on the surface, so it is easy to confirm the state of sticking.

  The thickness of the polyurethane film is recommended to be 0.04 to 0.1 mm. The thinner the thickness, the better the followability to finer irregularities, but the thicker the better, from the viewpoint of ensuring sufficient strength. From these viewpoints, the thickness range is desirable as described above.

  According to the covering cloth for ophthalmic surgery according to the present invention, when the peripheral edge portion of the opening of the covering cloth is attached to the skin, it can be easily attached without generating a gap such as wrinkles, and therefore, it is troublesome for the operator. In addition, since it can be applied without any gaps, it is possible to prevent leakage of cleaning fluid or the like during surgery on the patient side (back side of the covering cloth).

<Embodiment 1>
FIG. 1 is a view (front view) of a cover 20 for ophthalmic surgery according to Embodiment 1 of the present invention as viewed from the front side (anti-skin side), and FIG. 2 is a cross-sectional view taken along line AA shown in FIG. .

  This covering cloth 20 is composed of a covering cloth main body 21 that largely covers a patient and an opening peripheral edge 17 around the surgical field opening, and a structure in which an adhesive layer 19 is provided on the entire skin side of the peripheral edge 17. It has become. The covering cloth body 21 is made of a water-repellent polyester (or polypropylene) non-woven fabric, the peripheral edge portion 17 is made of a polyurethane film excellent in stretchability and flexibility, and the adhesive layer 19 is made of an acrylic resin.

  An opening 62 is provided in the opening peripheral edge portion 17 corresponding to the ophthalmic surgical field (in the figure, 17a indicates an opening edge of the peripheral edge portion 17), and the covering cloth main body 21 is larger than the opening 62. In addition, an opening smaller than the outer edge size of the peripheral edge portion 17 (in the drawing, 17b indicates the outer edge of the peripheral edge portion 17) is provided (in the drawing, 21a indicates the opening edge of the covering cloth body 21). As shown in FIGS. 1 and 2, the opening 62 of the peripheral edge portion 17 is arranged at the approximate center in the opening of the covering cloth body 21 (inside the opening edge 21 a). And these peripheral edge part 17 and the covering fabric main body 21 are affixed by the said adhesive layer 19. FIG.

The width of the adhesive layer 19 exposed in the opening of the covering cloth body 21 (inside the opening edge 21a), that is, the width of the opening edge 21a of the covering cloth body 21 from the opening edge 17a of the peripheral edge portion 17 (B ₁ , B ₂ ,...) Is approximately 10 to 30 mm, which is an appropriate size for attaching the covering cloth 20 to the periphery of the surgical field opening 62. When the product is stored (or transported) or the like, a release paper 18 is affixed to the side of the skin so as to cover the exposed surface of the adhesive layer 19 (virtual lines (two points in FIGS. 1 and 2). Indicated by chain line)).

  The overall shape of the covering cloth main body 21 is a quadrangle, and has a size (for example, 1200 mm long × 1250 mm wide) that can cover the entire face (or more) of the patient.

  The characteristics of the peripheral edge portion 17 will be described in detail. Thickness 0.06 mm, hardness 85, specific gravity 1.19, MD direction tensile strength 69.37 MPa (19.61 N / 5 mm), TD direction tensile strength 70.85 MPa ( 19.63N / 5mm), 589% elongation at tensile fracture in MD direction, 580% elongation at tensile fracture in TD direction, 1.25MPa (0.38N / 5mm) tensile stress at 5% elongation in MD direction, 5 in TD direction Tensile stress at% elongation of 1.26 MPa (0.38 N / 5 mm), tensile stress at MD extension of 10% 2.42 MPa (0.74 N / 5 mm), tensile stress at 10% elongation of TD direction of 2.32 MPa ( 0.70N / 5mm), tensile stress at 20% elongation in MD direction 3.75MPa (1.15N / 5mm), tensile stress at 20% elongation in TD direction 3.58MPa (1.09N / 5mm), 30 in MD direction Tensile stress at% elongation 4.44MPa (1.36N / 5mm), tensile stress at 30% elongation in TD direction 4.28MPa (1.30N / 5mm), M Tensile stress at 50% elongation in D direction 5.17MPa (1.58N / 5mm), Tensile stress at 50% elongation in TD direction 5.00MPa (1.51N / 5mm), Tensile stress at 100% elongation in MD direction 6.24 MPa (1.91 N / 5 mm), tensile stress at 100% elongation in the TD direction 6.09 MPa (1.85 N / 5 mm), tensile stress at 200% elongation in the MD direction 8.29 MPa (2.54 N / 5 mm), Tensile stress at 200% elongation in the TD direction: 8.17 MPa (2.48 N / 5 mm), Tensile stress at 300% elongation in the MD direction: 10.99 MPa (3.37 N / 5 mm), Tensile stress at 300% elongation in the TD direction 11.03 MPa (3.34 N / 5 mm), MD direction tear strength 141.18 kN / m, TD direction tear strength 148.77 kN / m polyurethane film (note that all measurement methods except thickness) According to JIS K 7311).

  The pressure-sensitive adhesive layer 19 is made of an acrylic resin with low skin irritation having an adhesive strength of 1.48 N / 25 mm and a holding power of 0.3 mm (all measurement methods are based on JIS Z 0237).

  Next, how to fold the cover cloth 20 of the first embodiment will be described.

  FIGS. 3A to 3C, FIGS. 4A to 4D, and FIGS. 5A to 5G are front views showing a folding procedure of the cover cloth 20. FIG. 3 is a view seen from the front side (anti-skin side) of FIG. Since the release paper 18 is peeled off immediately before use, the product is provided with the release paper 18 (for convenience, the paper attached with the release paper 18 may also be referred to as a cover cloth 20). ).

First, as shown in FIG. 3 (a), has one side 21b ₁ of the four sides of the drapes 20, the edges 21b ₁ is folded in the manner a deep enough to cover the peripheral portion 17 (arrow C). At this time, the front side (the anti-skin side) is the inside of the folding. Subsequently, the folding edge C ₁ is held, and the folding edge C ₁ is folded inward so that the folding edge C ₁ is located slightly outside the main body opening edge 21a (FIG. 3B, arrow D). Next, the cover cloth 20 has the side 21b ₁ and is folded outward along the folding edge C ₁ (FIG. 3 (c), arrow E).

Next, similarly to the above, the side 21b ₂ is opposed to the side 21b ₁ and the front side (anti-skin side) is folded inward so that the side 21b ₂ is deep enough to cover the peripheral edge 17 (FIG. 4). (A), arrow F). Subsequently, the folding edge F ₁ is held, and the folding edge F ₁ is folded inward so that the folding edge F ₁ is positioned slightly outside the main body opening edge 21a (FIG. 4B, arrow G). Next, the cover cloth 20 has the side 21b ₂ and is folded outward along the folding edge F ₁ (FIG. 4C, arrow H).

Next, one side 21b ₃ between the side 21b ₁ and the side 21b ₂ is provided, and the front side (anti-skin side) is folded inward so that the side 21b ₃ is deep enough to cover the peripheral edge 17 ( FIG. 4 (d), arrow I). Subsequently, the folding edge I ₁ is held, and the folding edge I ₁ is folded inward so that the folding edge I ₁ is positioned slightly outside the main body opening edge 21a (FIG. 5A, arrow J). Next, the covering cloth 20 has the side 21b ₃ and is folded outward along the folding edge I ₁ (FIG. 5B, arrow K).

Next, similarly to the above, the side 21b ₄ is opposed to the side 21b _3, and the front side (anti-skin side) is folded inward so that the side 21b ₄ is deep enough to cover the peripheral edge 17 (FIG. 5). (C), arrow L). Subsequently, the folding edge L ₁ is held, and the folding edge L ₁ is folded inward so that the folding edge L ₁ is positioned slightly outside the main body opening edge 21a (FIG. 5 (d), arrow M). Next, the covering cloth 20 has the side 21b ₄ and is folded outward along the folding edge L ₁ (FIG. 5 (e), arrow N).

When folded in this manner, as shown in FIG. 5 (f), the entire peripheral edge portion 17 inside the main body opening edge 21a appears. Note that the side 21b ₁ and the side 21b ₂ are located on the inner side of the folded outer width end as in the illustrated example, whereas the side 21b ₃ and the side 21b ₄ are outside the folded outer width end ( Alternatively, the peripheral edge 17 is a horizontally long rectangle or is due to the size of the covering cloth main body 21.

After that, the side 21b ₃ side and the side 21b ₄ side are matched and folded in two (FIG. 5 (f), arrow O). The folded cloth product in the folded state is completed as described above (FIG. 5 (g)).

  Next, the usage method of this covering cloth 20 is demonstrated.

  First, the release paper 18 is removed from the covering cloth product shown in FIG. 5 (g) to expose the adhesive layer 19 of the peripheral portion 17, and the peripheral portion 17 is provided around the patient's surgical field (periphery of the heel) while unfolding the above two folds. Paste.

  At this time, as shown in FIG. 5 (f) and FIG. 6 (a front view for explaining how to use the covering cloth 20 product), the covering cloth 20 is in a folded and compact state, All of the peripheral edge 17 on the inner side of the main body opening edge 21a is visible from the outside. Since the peripheral edge portion 17 is rich in flexibility and can be extended well, it can follow the unevenness around the eyes well, and can be adhered and adhered to the skin by the adhesive layer 19, and this operation is easy. is there. More specifically, since the elongation in the MD and TD directions of the peripheral edge portion 17 is as large as about 580% as described above, it can be stretched and pasted even when the unevenness is severe, and the wrinkle is difficult to move. The tensile stress at 10% elongation in the MD and TD directions is about 2.4 MPa, the tensile stress at 20% elongation is about 3.7 MPa, and it grows with a force of about 1.1 N, while In order to follow the irregularities, it is usually only necessary to stretch about 20%, so it can be pasted so as not to make a gap easily.

  Furthermore, since the peripheral edge part 17 is translucent, the state of attachment can be confirmed from the front side (anti-skin side). Specifically, the color looks different in the pasted and floating areas. And if there is a floating part (a part that has a gap due to wrinkles, sticking unevenness, or floating), it can be easily made free of gaps by pressing it firmly.

  In addition, even when it is desired to re-paste, since the cover cloth 20 is compactly folded, the re-paste can be performed cleanly and easily. In other words, once the cover cloth is unfolded and re-applied, it is difficult to operate because of its large size, and for this reason there is a risk of touching and contaminating various parts of the cover cloth. It is possible to avoid contamination. Further, since it is compact as described above, it can be easily performed even when it is operated alone. In addition, as for the operation of pasting itself, since the peripheral edge portion 17 has a good restoration property, the stretched portion returns to its original state and hardly remains as a wrinkle.

In this way, after the peripheral edge portion 17 is attached to the skin without a gap, the vicinity of the side 21b ₃ and the side 21b ₄ (for example, the star mark shown in FIG. 6A) is grasped and slid outward. (Arrow P). Subsequently, the vicinity of the side 21b ₁ and the side 21b ₂ (for example, the star mark shown in FIG. 6B) is grasped and slid outward to expand (arrow Q).

  In this way, the covering cloth 20 is spread (FIG. 1), and the operation of covering the patient with the covering cloth 20 is completed.

  Thereafter, an operation is performed. At this time, the peripheral edge 17 of the opening around the heel is affixed without a gap so as to be tightly adhered. Side) is avoided.

<Embodiment 2>
FIG. 7 is a view of the ophthalmic surgical covering cloth 10 according to the second embodiment of the present invention as viewed from the front side (anti-skin side). The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals to avoid redundant description.

  The covering cloth 10 is of a liquid-receiving pocket type, the overall size is smaller than that of the first embodiment, and the side edges 12 and 13 are bonded by folding back the portion of the covering cloth body 11 on the outer corners. Thus, the liquid receiving pocket 14 is formed. This covering cloth main body 11 consists of a sheet | seat made from a polyethylene, and shows waterproofness. A rod-shaped shape retaining member 16 is attached to the sheet on the side opposite to the skin in the pocket 14 in the vicinity of the edge in parallel with the pocket inlet 14a. The shape-retaining member 16 is made of synthetic resin and can be plastically deformed (for example, a relatively hard and deformable polyethylene resin strip). In addition, by folding the shape-retaining member 16 so as to protrude the substantially central portion thereof, the pocket inlet 14a is greatly opened, and the cleaning liquid and the like during the operation can be collected well in the pocket 14 (FIG. 8: Embodiment 2) The front view showing the state which opened pocket 14 widely about covering cloth 10 for ophthalmic surgery). Other configurations of the cover cloth 10 of the second embodiment are the same as those of the first embodiment.

  Also in the second embodiment, since the peripheral edge portion 17 is rich in flexibility and extends well, it is easy to follow the irregularities around the eyes and can be easily adhered and pasted. Moreover, since the peripheral part 17 is translucent, since it can affix while confirming the sticking state, it can prevent a sticking remaining.

  In addition, the covering cloth 10 of Embodiment 2 may be used alone or, for example, pasted and used so as to overlap the anti-skin side surface of a large covering cloth (with a larger surgical field opening). Also good.

<Embodiment 3>
9 is a view of the ophthalmic surgical covering cloth 30 according to Embodiment 3 of the present invention as viewed from the front side (anti-skin side), and FIG. 10 is a cross-sectional view taken along the line RR shown in FIG. In the figure, the release paper 18 is also drawn. In addition, the same components as those in FIGS.

  The covering cloth 30 of the third embodiment has a structure in which the liquid receiving pocket type covering cloth 10 of the second embodiment is attached to the anti-skin side of the large-sized non-woven cloth covering main body 21. The polyethylene sheet covering cloth main body 11 is pasted by a double-sided adhesive tape 39 in the vicinity of the main body opening edge 21a (they are overlapped so that each main body opening edge 21a just fits), and the peripheral part on the anti-skin side of the covering cloth body 11 17 (with the adhesive layer 19) is attached (FIG. 10).

  In the case of the third embodiment, it is recommended that it is folded as described in the first embodiment. At the time of folding, the cover-type cloth 10 of the pocket type portion is preferably handled integrally with the cover-cloth main body 21.

  Also in the third embodiment, since the peripheral edge portion 17 is rich in flexibility and extends well, it is easy to follow the unevenness around the eyes and can be easily adhered and pasted. Moreover, since the peripheral part 17 is translucent, since it can affix while confirming a sticking state, it can prevent that a sticking residue arises.

<Embodiment 4>
FIG. 11 is a partial cross-sectional view of an ophthalmic surgical covering cloth 40 according to Embodiment 4 of the present invention. In the figure, the release paper 18 is also drawn. In addition, the same components as those in FIGS.

  In the first to third embodiments, a configuration in which the peripheral edge portion 17 (polyurethane film) is attached to the front side surfaces (anti-skin side surfaces) of the covering fabric bodies 21 and 11 is shown. It is attached to the back side surface (skin side surface) of the cloth body 21. In this attachment, the front side (anti-skin side) of the peripheral edge portion 17 and the back side (skin side) of the covering cloth body 21 are pasted with the double-sided adhesive tape 49.

  Also in the fourth embodiment, as in the first embodiment, the peripheral edge portion 17 extends with good flexibility, so that it can easily follow the irregularities around the eyes and can be easily adhered and pasted. Moreover, since the peripheral part 17 is translucent, since it can affix while confirming the sticking state, it can prevent a sticking remaining.

<Test>
As a material for the peripheral edge portion 17, an ester crystal type thermoplastic polyurethane film (sample A: thickness 60 μm, sample C: thickness 80 μm), polyester thermoplastic polyurethane film (sample B: thickness 80 μm) should be used. These samples A, B, and C were subjected to various measurements related to their characteristics.

  The measurement items are thickness (Table 1), tensile strength (JIS K7311) (Table 1), elongation at break (JIS K 7311) (Table 2), tear strength (JIS K7311) (Table 3), 5%, 10 %, 20%, 30%, 50%, 100%, 200%, 300% Tensile stress at elongation (JIS K 7311) (Tables 4 to 11), total light transmittance and haze from the front side of the film (JIS K 7105, measurement dimensions: about 50 mm × 50 mm, room temperature: 22 ° C., tester used: direct reading haze computer HGM-2K manufactured by Suga Test Instruments Co., Ltd. (Table 12), TPU gloss (JIS K 7105, gloss meter: Minolta) GM-60 (angle 60 °)) (Table 13). However, for TPU gloss, only sample A was measured.

  In various measurements, five test specimens were taken for one type of sample, and each of these was measured and the average value was determined.

  These measurement results are shown in Tables 1-13.

  As can be seen from the above results, Samples A, B, and C are all flexible, stretchable, stretched with a light force, sufficiently strong, translucent, and less glossy. . Therefore, it can be suitably used as the peripheral portion 17.

  As described above, the present invention has been specifically described by way of examples. However, the present invention is not limited by the above examples, and may be implemented with appropriate modifications within a range that can meet the above-mentioned purpose. Of course, these are all possible and are included in the technical scope of the present invention.

  For example, as the material of the covering cloth body, in addition to the above-mentioned polyester (or polypropylene) non-woven fabric and polyethylene sheet, non-woven fabric having a water absorption function, synthetic resin film (sheet) made of olefin resin such as polypropylene, etc. There may be.

  Further, the material of the peripheral portion 17 is not limited to the above example, and may be selected from a polyurethane film that is flexible and stretches well.

It is the figure (front view) which looked at the ophthalmic surgery covering cloth which concerns on Embodiment 1 of this invention from the front side (anti-skin side). It is the sectional view on the AA line shown in FIG. FIG. 6 is a front view (No. 1) for explaining the folding procedure of the ophthalmic surgical cover according to the first embodiment. FIG. 5 is a front view (No. 2) for explaining the folding procedure of the ophthalmic surgery cover cloth according to the first embodiment. FIG. 6 is a front view (No. 3) for explaining the folding procedure of the ophthalmic surgical covering cloth according to the first embodiment. FIG. 3 is a front view for explaining a method of using the ophthalmic surgical covering cloth product of Embodiment 1. It is the figure (front view) which looked at the ophthalmic surgery covering cloth which concerns on Embodiment 2 of this invention from the front side (anti-skin side). It is a front view showing the state which opened the pocket widely about the ophthalmic surgery covering cloth which concerns on Embodiment 2. FIG. It is the figure (front view) which looked at the ophthalmic surgery covering cloth which concerns on Embodiment 3 of this invention from the front side (anti-skin side). It is the RR sectional view taken on the line shown in FIG. It is a fragmentary sectional view of the covering cloth for ophthalmic surgery concerning Embodiment 4 of the present invention.

Explanation of symbols

10, 20, 30, 40 Ophthalmic surgical covering cloth 11, 21 Cover cloth body 14 Liquid receiving pocket 17 Opening peripheral edge 17a Opening edge of peripheral edge 17b Outer edge of peripheral edge 18 Release paper 19 Adhesive layer 21a Covering cloth main body Opening edge of 62 Opening

Claims (6)

In an ophthalmic surgical covering used with an opening corresponding to the ophthalmic surgical field, and using the peripheral edge of the opening attached to the skin,
A covering cloth for ophthalmic surgery, characterized in that at least the peripheral edge is made of a polyurethane film, and an adhesive layer is provided on the skin side surface of the polyurethane film.   2. The polyurethane film has a tensile stress (according to JIS K 7311) at 100% elongation in the MD direction and TD direction of 8.0 MPa or less and an elongation at tensile break (according to JIS K 7311) of 500% or more. An ophthalmic surgical covering described in 1.   The covering cloth for ophthalmic surgery according to claim 1 or 2, wherein the pressure-sensitive adhesive layer has a pressure-sensitive adhesive strength (according to JIS Z 0237 180-degree peeling pressure measuring method) of 0.9 to 2.5 N / 25 mm.   The covering cloth for ophthalmic surgery according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive layer has a holding force (according to JIS Z 0237 (shift length)) of 0.1 to 0.5 mm.   The cover cloth for ophthalmic surgery according to any one of claims 1 to 4, wherein the polyurethane film is transparent or translucent. The polyurethane film has a total light transmittance (according to JIS K 7105) of 60 to 80%, and a diffuse transmittance (haze value) in the total transmitted light (according to JIS K 7105) of 60 to 85%. The covering cloth for ophthalmic surgery according to claim 5.

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