HEALTH APPOINTMENT

Abstract

A medical dressing is provided to protect a portion of a catheter protruding from a patient's body through a skin entry site. The dressing comprises a proximal zone for placement over a primary dressing in contact with the patient's skin, a distal zone, and an intermediate zone between the proximal and distal zones, thus forming a sheath to accommodate the catheter portion. The proximal zone includes a polyurethane-compatible adhesive to allow repositioning of the dressing over the primary dressing.

Description

SANITARY DRESSING FIELD OF INVENTION This description refers to sanitary dressings, more specifically to sanitary dressings to protect a protruding part of a catheter inserted into a patient's body. BACKGROUND OF THE INVENTION During patient care, catheters may be used to access the circulatory system for purposes such as blood collection, patient hydration, medication administration, and kidney dialysis, among others. A catheter typically includes an insertion end that penetrates the patient's circulatory system through a skin opening, i.e., the skin entry site; a valve mechanism that closes off access, for example, to a vein, when the device is not in use; and a connection port that remains outside the body and allows connection of an external device such as an IV (intravenous) drip source, a syringe, etc. Such a catheter may remain in the body for an extended period. To protect the skin entry site, i.e., an open wound, a primary self-adhesive dressing is commonly used to secure the catheter, cover the skin entry site, prevent infection, and improve patient comfort.In some cases, the protruding or exposed part of the catheter, that is, the part not covered by the main dressing, may nevertheless remain uncovered, which can cause infections and discomfort to the patient. In other cases, in addition to the primary dressing applied to the skin insertion site, the protruding portion of the catheter may be wrapped in sterile gauze to prevent infection. However, access to the protruding portion of the catheter may be necessary for treatment. Therefore, each time the catheter needs to be accessed, all the gauze must be removed, which is time-consuming and can also cause discomfort to the patient. Furthermore, standard dressings include adhesives to ensure proper adhesion to the patient's skin, for example, to prevent unwanted movement or accidental detachment. However, the use of strong adhesives can result in excessive adhesion of the dressing, which can not only make removal difficult and cause pain and / or discomfort to the patient, but can even damage the dressing upon removal. In addition, excessive adhesion of the adhesive to the patient's skin can also lead to separation of the different layers of the dressing due to the pulling force applied during removal. In addition, the adhesive may not allow the patient's skin to breathe, which can result in excessive perspiration that may cause irritation and discomfort. US2015257833 A1 describes a catheter coating device with a sleeve and an adhesive film. US2008208145 A1 describes a disposable bath protector for renal access catheter. EP0671182 A1 describes a catheter protector. EP3378451 A1 describes a sanitary dressing for protecting a protruding part of a catheter implanted in a patient's body. zezenn / zznz / E / YiAi In conclusion, it may be convenient to use a sanitary dressing that protects the protruding part of the catheter, facilitates access to said protruding part for treatment, and ensures adequate fixation and easy removal, while at the same time maintaining integrity upon removal and improving patient comfort. BRIEF DESCRIPTION OF THE INVENTION In the first aspect, a medical dressing is provided to protect a portion of a catheter that protrudes from the patient's body through a skin entry site. The medical dressing comprises a proximal zone for placement over a primary dressing in contact with the patient's skin, a distal zone, and an intermediate zone between the proximal and distal zones, thus forming a sheath to accommodate the catheter portion. The proximal zone includes an adhesive compatible with polyurethane, or with a polyurethane film dressing, to allow repositioning of the medical dressing over the primary dressing. Using a primary dressing in conjunction with a sanitary dressing allows for simultaneous and separate protection of the skin insertion site and the protruding portion of the catheter. This means that, on the one hand, the risk of infection at the exposed portion of the catheter (the protruding part) is avoided or at least substantially reduced. On the other hand, the skin insertion site can be covered and protected for longer periods, meaning the primary dressing can remain in place for extended periods, thus improving patient comfort. Furthermore, the use of a polyurethane-compatible adhesive on the dressing prevents it from becoming firmly attached to the main dressing. The dressing can be easily separated from the main dressing without causing the main dressing to detach and / or without causing discomfort to the patient. If the dressing is not correctly positioned, it can be removed and repositioned until it is properly positioned. Therefore, a repositionable dressing can be obtained. Furthermore, since the sanitary dressing is independent of the main dressing, it can be disposed of separately, for example, if it becomes stained with blood or wet with fluids leaking from the catheter. In some cases, the adhesive may only cover part of the surface of the proximal area. Therefore, adhering the proximal area to the main dressing may not reduce the breathability of the main dressing. In one example, the sheath may comprise a first opening disposed between the proximal and intermediate zones to allow the portion of the catheter protruding from the skin entry site to be housed in the sheath, and a separable junction that closes the distal zone and forms a second opening upon removal. Providing a detachable connection with a locking mechanism allows access to the catheter, for example, for treatment, without removing the entire dressing, so that the skin entry site and the catheter protruding from the patient's body are not unnecessarily exposed and the risk of infection is therefore reduced. Additionally, if urgent access to the catheter is required, for example, quickly, there is no need to rapidly detach the entire dressing from the patient's skin to access the protruding portion of the catheter. The detachable attachment provides easy and rapid access while the dressing is still adhered to the skin. This avoids the risk of injuring the patient by quickly removing the dressing in the event of urgent access. Therefore, patient comfort can be improved by avoiding unpleasant removals. In some examples, the sanitary dressing may comprise an outer sheet and an inner sheet joined together by junctions in the intermediate and distal areas, thus forming the sheath. In some examples, where the distal seams may differ from the intermediate seams—preferably being weaker—the intermediate seams form stops that limit the opening of the second opening when separating the separable seam. Using different types of seams can result in a dressing with seams of varying strength; that is, some seams may be weaker or easier to separate, for example, the seams forming the separable opening, thus creating a gradient of strength. Therefore, stops may form at the transition point between the different types of seams. These stops allow the separable seam to be separated to a predetermined opening size without risk of tearing the dressing or separating the layers that make up the cover. In some examples, the seams are continuous in the intermediate zone and discontinuous in the distal zone, further facilitating the opening of the second opening. Furthermore, the size of the second opening can also be limited to the point where the continuous seams begin, creating stops. Complete separation of the sheath is also avoided, as the force required to separate continuous seams is greater than that required for discontinuous seams. In some examples, the intermediate zone may be funnel-shaped to facilitate insertion of the protruding part of the catheter into the sheath and prevent movement of the catheter within the sheath. In some examples, the dressing may also include a removable protective film in the proximal area to protect the adhesive, so the adhesive can be covered until the dressing is ready for use. In some examples, the proximal zone may have a detachment value of less than 0.6 N / 10 mm. This can help to easily separate the sanitary dressing from the main dressing without causing the main dressing to separate and / or without causing discomfort to the patient. According to another aspect, a sanitary dressing system is provided. The sanitary dressing system comprises: a main dressing for securing a catheter protruding from the patient's body through a skin entry site and for covering the skin entry site; and a sanitary dressing according to any of the examples described herein. In some examples of the sanitary dressing system, the main dressing and the sanitary dressing can be independent of each other. In some examples of the sanitary dressing system, the proximal zone may comprise a repositionable adhesive. In some examples of medical dressing systems, the main dressing may comprise a primary adhesive for adhering to the skin, and the primary adhesive and the proximal adhesive may have different properties. These different properties may be related to varying degrees of adhesion to a given surface. zrzrnn / zznz / E / YiAi In some examples of the medical dressing system, the proximal zone may have a lower release value than the main dressing. The release value of the main dressing may refer to the area of ​​the main dressing that will bond to the skin, for example, between the area where the main adhesive can be applied and the skin. In some examples of the medical dressing system, the proximal zone may have a higher MVTR value than the primary dressing. The MVTR value of the primary dressing may refer to the area of ​​the primary dressing that will adhere to the skin, for example, between the area where the primary adhesive can be applied and the skin. Throughout this description, the term "system" in the expression "sanitary dressing system" should be understood as an arrangement, set, kit, or the like. Throughout this description, the term detachment should be understood as adherence to detachment. BRIEF DESCRIPTION OF THE FIGURES The following are some non-exhaustive examples of the present description, with reference to the attached figures, in which: FIG. 1 schematically illustrates a top view of a sanitary dressing according to an example; and FIG. 2 schematically illustrates a very schematic side view of a sanitary dressing according to an example. DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a sanitary dressing 100 viewed from the side intended to come into contact with a primary dressing adhered to the patient's skin. The sanitary dressing 100 may comprise a proximal zone 101 to be disposed over a primary dressing, a distal zone 103, and an intermediate zone 102 disposed between the proximal zone and the distal zone. The proximal zone 101 may include adhesive 160 on the side facing the patient's skin for adhering dressing 100 to the main dressing. Adhesive 160 may be applied in a pattern to leave areas without adhesive, thereby reducing the breathability of the main dressing and allowing the patient's skin to breathe. In one example, the area without adhesive may be approximately 50% of the proximal zone. Adhesive 160 can be applied directly to the proximal zone 101, creating a predetermined pattern. Alternatively, a continuous layer of Adhesive 160 can be applied to the surface of the proximal zone, and the surface can then be treated, for example, by drilling, transferring, laminating, etc., to remove some of the adhesive. In one example, the adhesive pattern may comprise diamond-shaped spots. In another example, the adhesive may be arranged in a plurality of continuous or discontinuous strips, thus leaving areas without adhesive in the proximal zone 101 (see FIG. 1). The adhesive strips may be arranged longitudinally along almost the entire width of the proximal zone, as shown in FIG. 1. In another example (not shown), the adhesive strips may be arranged vertically along the entire height of the proximal zone. zrzrnn / zznz / E / YiAi The adhesive 160 can be any adhesive compatible with the primary dressing material, such as polyurethane, and that maintains its adhesive strength over time. In other words, it must be an adhesive that, once applied, does not increase in strength while the 100 dressing remains adhered to the primary dressing. Therefore, removing the 160 dressing does not cause the primary dressing to separate; that is, the primary dressing cannot be pulled off along with the 160 dressing, thus preventing unpleasant or painful separation. As a result, the pulling force exerted when removing or repositioning the 160 dressing does not affect the patient's comfort. The adhesive 160 can be a repositionable adhesive, for example, an acrylic or silicone-based adhesive. A repositionable adhesive prevents an increase in the adhesive's adhesion, and therefore the adhesive bond of the dressing, to the main dressing over time. This reduces the likelihood of the main dressing separating from the skin contact surface when removing or repositioning the adhesive 100. Therefore, the possibility of the adhesive 100 tearing during removal or repositioning can be avoided or at least substantially reduced. In other words, by using a repositionable adhesive, excessive pulling force can be avoided when removing the adhesive 100 from the main dressing. Therefore, the risk of injury or discomfort to the patient can be substantially reduced.Furthermore, this repositionable adhesive allows the 100 sanitary dressing to be repositioned since the dressing can be adhered and removed as many times as necessary to obtain a suitable position, i.e., a position that receives the protruding part of the catheter. For example, adhesive 160 could be an acrylic adhesive, a polyurethane adhesive, a silicone adhesive, a hydrocolloid, a hot melt adhesive, or any other suitable adhesive material. For instance, if the adhesive is acrylic-based, adhesive 160 might contain a higher proportion of plasticizer than conventional acrylic adhesives. The viscoelastic properties of an adhesive can be defined by the Storage Modulus (G') which measures the adhesive's ability to store energy, and in which, the higher the value of G', the more elastic the adhesive is; by the Loss Modulus (G") which measures the adhesive's ability to dissipate energy, and in which, the higher the value of G, the more viscous the adhesive is; and by the Loss Factor [tan (G7 G')] which is the ratio between G and G'. In one example, adhesive 160 may have, in a temperature range between 342C and 37SC, a G' of approximately 6200 - 8000 Pa, more specifically approximately 6450 - 7570 Pa; a G” of approximately 3500 - 8000 Pa, more specifically approximately 3989 - 7436 Pa; and a tan (G7G') of approximately 0.35 - 1.2, more specifically approximately 0.62 - 0.99. Furthermore, the proximal area 101 may exhibit a high moisture vapor transmission rate (MVTR) once the adhesive is applied. A high MVTR is defined as a value that allows sufficient skin perspiration during dressing use, for example, for 2–3 days. For instance, the MVTR may be greater than 1500 g / (m²x24h), i.e., 1500 g per square meter per day, measured according to EN 13726-2:2002. Having a high MVTR in the proximal zone 101, the permeability of the main dressing cannot be affected, i.e., when the sanitary dressing adheres and, therefore, the patient's skin can zrzrnn / zznz / E / YiAi breathe despite having two overlapping dressings, i.e., the main dressing and the proximal zone, adhered to the same. The proximal zone 101 may have a coating weight greater than 50 g / m2. This coating weight allows for adequate adhesion of the sanitary dressing 100 to the main dressing. The sanitary dressing 100 may further comprise a detachable sheet 170 in the proximal area 101 (shown almost removed in FIG. 1) to protect the adhesive until the dressing adheres to the main dressing. In some examples, to facilitate its removal, the detachable sheet 170 may be divided into two separate sheets and / or may comprise an outwardly projecting tab (not shown). The dressing 100 may also comprise a sleeve 110 arranged in both the distal and intermediate areas 103, 102. The sleeve 110 may be sized to receive the protruding portion of a catheter 20 inserted into a patient's body at a skin entry site 11 (see FIG. 2). In one example, the sleeve 110 may have a width of approximately 20–80 mm, more specifically approximately 52–54 mm; and a length of approximately 80–160 mm, more specifically approximately 153.5–157.5 mm. In some examples, the dimensions of the dressing may be reduced to better suit the dimensions of the catheter. The sheath 110 may comprise an inner sheet 111 for contact with the patient's skin and an outer sheet 112, which may be longer than the inner sheet, for positioning the adhesive on the protruding portion of the outer sheet, i.e., the proximal area 101 (see FIG. 2). In an alternative example, the inner and outer sheets 111, 112 may be of the same length, and the proximal area 101 or the protruding portion may be manufactured separately and subsequently attached to the sheath. The inner and outer sheets 111, 112 can be joined together, for example, by adhesive, by ultrasonic welding, or by any other suitable method, thus forming the sheath 110 comprising an inner cavity in which the protruding part of a catheter 20 can be housed. The sheets 111, 112 can be joined by junctions at their edges, i.e., around almost the entire periphery, except where the outer sheet begins to protrude or overlap the inner sheet where a first opening 120 may have been formed. The first opening 120 allows the protruding portion of the catheter to access and be accommodated within the sleeve 110. This first opening 120 may be located at one end of the sleeve 110, for example, where the outer layer 112 extends beyond the inner layer 111 (see FIG. 1). That is, the area where the outer layer begins to protrude may be seamless to form the first opening. The first opening 120 of the sleeve 110 may be positioned to align with the protruding portion of the catheter once the dressing 100 is adhered to the main dressing. In an alternative example, the inner sheet 111 and outer sheet 112 can be joined to form a completely sealed sleeve, i.e., one comprising seams along its entire perimeter. In such a case, the first opening 120 can be formed in the inner sheet 111, for example, by making a cut or removing part of the inner sheet 111. Additionally, the inner and outer sheets 111, 112 can also be joined to form a separable junction 130 which, when separated, creates a second opening through which, for example, healthcare personnel can easily access the protruding portion of the catheter. The separable junction 130 can be positioned in the distal area 103, for example, surrounding at least part of the periphery of the dressing. In other instances, the separable junction can be positioned on a side wall of the sheath. The type of seams joining the inner and outer layers 111, 112 can vary in different areas of the sheath, i.e., along at least part of its periphery. For example, the seams in the intermediate zone 102 may be continuous, while the seams in at least part of the distal zone 103 may be discontinuous, creating the separable seam 130. Discontinuous seams may be easier to uncouple, thus facilitating the separation of the separable seam 130, whereas continuous seams may be stronger or more difficult to separate, providing structural strength to the sheath. Therefore, access to the protruding portion of the catheter from the distal zone, i.e., by separating or pulling the separable seam, can be quick and easy. Furthermore, because different types of joints are present in the distal and intermediate zones, stops 140 can be formed. Stops 140 can restrict the opening of the second opening 130, i.e., the separated separable joint, preventing complete separation of the inner and outer sheets. Therefore, by using such stops, the size of the second opening 130 can be predetermined; that is, the separable joint will only separate up to the stops or to the point where the joints become continuous, for example, the boundary between the intermediate and distal zones. The inner and outer sheets 111, 112 may be made of a breathable non-woven material and / or a material capable of crumpling, but rigid enough to form a protective cover, e.g., polypropylene, to facilitate separation of the inner and outer sheets without damaging the dressing. In some examples, the inner and outer laminae 111, 112 of the distal zone may comprise a pull tab 150 to separate both laminae and facilitate separation of the separable joint. The inner cavity of the sheath, i.e., the inner surfaces of the inner and / or outer sheet, may be hydrophilic. A hydrophilic surface absorbs water or water-based compounds, such as blood or any bodily fluid secreted through the catheter port and / or the protruding portion of the catheter, and thus helps keep the inner cavity dry. In one example, the dressing may also include an antiseptic coating, such as polyhexanide, chlorhexidine, silver, etc. In this example, the inner surfaces of the sheath may contain the antiseptic coating. In addition, the outer surfaces of the inner and outer sheet 111, 112 may be hydrophobic or may comprise a hydrophobic coating to protect the dressing from external moisture. As shown in FIG. 1, the width in at least some parts of the intermediate zone 102 can be narrower than the width of the proximal zone, thus preventing movement of the protruding portion of the catheter within the sheath. In one example, the width along the intermediate zone can be progressively reduced; for example, the widest part of the sheath can be 25% wider than the narrowest part. In one example, the intermediate zone can be funnel-shaped. In another example, the intermediate zone can be bell-shaped. In one example (not shown), the 100 sanitary dressing may include an auxiliary adhesive fixation system. The auxiliary adhesive fixation system may be arranged in the intermediate or distal zone of the sanitary dressing to further prevent movement of the dressing. In one example, the auxiliary adhesive fixation system may include a strip of adhesive according to any of the described examples. In one example, the auxiliary fixation system may be arranged on the cover. In some examples, the proximal zone 101 may have a detachment value of less than 0.6 N / 10 mm. This may mean 0.6 N for a 10 mm wide adhesive tape. The inventors conducted a peel test to compare a sanitary dressing, based on any of the examples described here, with some commercially available products. The peel test was performed to determine the peel adhesion properties according to ISO 29862:2018. Specifically, Method 1 of that standard was implemented. Method 1 relates to Self-adhesive tapes – Measurement of peel adhesion of stainless steel at an angle of 180°. Method 1 provides a measure of the force required to remove adhesive tape applied to a stainless steel plate at a 180° angle. A piece of adhesive tape is applied to the standard plate, which is then held vertically in one of the jaws of a dynamometer. The other jaw pulls the free end of the adhesive tape at a 180° angle to the plate. The adhesive strength is measured by the force required to continuously peel the tape from the plate so that the line of separation is perpendicular to the applied force. The following table shows the results obtained. The term adhesion to peel is used in the sense of the ISO standard mentioned above: zezenn / zznz / E / YiAi Product Peel Adhesion (N / 10mm) Bag Oper cat”(IHT) 0.36 IV3000® (S&N) 0.90 Tegaderm IV® (3M) 2.06 Tegaderm CHG® (3M) 0.70 Oper film protect IV (IHT) 1.67 The first element, "Oper cat bag", may be related to a sanitary dressing as described herein, manufactured by the applicant (Iberhospitex SA, abbreviated IHT). The second through fifth elements may be characterized by a peel strength greater than 0.6 N / 10 mm for peeling off the steel plate. To make the peel test as similar as possible to an application of an “Oper cat” bag, the inventors have carried out some tests by first placing the main dressings (IV3000®, Tegaderm IV®, Oper film protect IV) for use in combination with the “Oper cat” bag and on a standard ISO steel plate, obtaining the following average results: Product Peel Adhesion (N / 1 Omm) Bag Oper cat” (IHT) 0.41 Oper cat” (IHT) 2.72 "Oper cat" may be a sample dressing with a configuration similar to the sanitary dressing 100 but with a main dressing adhesive 2 such as "Oper film protect IV", which has a conventional acrylic adhesive. The results in the second table may mean that a primary dressing or a sanitary dressing with the adhesive of a primary dressing, adhered to a primary dressing that is adhered to the stainless steel plate, can cause the primary dressing to be removed from the plate and, therefore, from the skin. However, the “Oper cat” bag, as an example of a sanitary dressing 100 described here with adhesive 160, can be separated from the primary dressing 2 without separating the primary dressing from the plate or skin. FIG. 2 represents, in irregular proportions for clarity, a highly schematic cross-sectional view of a catheter emerging from a skin entry site 11 covered by a master dressing 2. In addition, FIG. 2 shows the sanitary dressing 100 of FIG. 1 adhered over the master dressing 2, wherein the sanitary dressing comprises the protruding portion of the catheter 20 housed within the sheath 110. FIG. 1 represents only the cut along a plane perpendicular to the plane of the sanitary dressing 100 and, therefore, the sides along which the inner and outer sheets 111, 112 are sewn or otherwise joined are not shown. In FIG. 2, the sleeve 110 is shown with the separable opening 130 closed; that is, the separable junction is shown unseparated. FIG. 2 also shows the protruding portion 20 of the catheter passing through the first opening 120 to be housed within the sleeve 110 of the sanitary dressing 100. In this example, the catheter comprises a connection port 21 to which various accessories can be connected, for example, an optical module, a fluid injector, etc. In other examples, different types of catheters may be used. Figure 2 also shows adhesive strips 160 placed in the proximal area 101 that adhere to the main dressing 2. Due to the high MVTR of the proximal area 101, the skin 10 can breathe despite the overlap of the two dressings. Perspiration, therefore, cannot be reduced, which improves patient comfort. Medical dressings, such as those described here, can be attached to a primary dressing 2 adhered to a patient's skin after a catheter has been implanted at a skin entry site. Whenever access to the protruding portion of the catheter is not required, it can be enclosed within the sheath to prevent infection. The medical dressing 100 can remain in place until access to the catheter is needed, at which point the detachable attachment can be separated. That is, when access to the catheter is required, the detachable attachment 130 can be separated, and the protruding portion of the catheter can be accessed by healthcare personnel, for example, to attach an accessory to the catheter port in order to deliver treatment. While the catheter is in use, that is, when a treatment is being administered, for example, when a drug is injected, the dressing can remain attached to the primary dressing. To prevent infection, at the end of treatment, the accessory can be disconnected from the catheter port. If the catheter is not expected to be used in the near future, for example, to administer further treatment, the entire dressing can be removed and discarded, and replaced with a new dressing that has a sealed separable seam. The primary dressing can remain adhered to the patient's skin for, say, 7 days, thus protecting the skin entry site, while the accessory dressing, as described in any of the examples, can remain in place, i.e., adhered to the primary dressing, for approximately 2 to 3 days. Therefore, the frequency of primary dressing removal can be reduced, and the protruding portion of the catheter and the skin entry site remain protected. As shown in FIG. 2, a sanitary dressing system comprises a main dressing 2 for securing a catheter 20 protruding from a patient's body through a skin entry site 11, and for covering the skin entry site 11. The sanitary dressing system further comprises a sanitary dressing 100 according to any of the examples described herein. In examples of the sanitary dressing system, the main dressing 2 and the sanitary dressing 100 can be independent of each other. The sanitary dressing 100 can be attached to the main dressing 2 via adhesive 160. In examples of the sanitary dressing system, the proximal zone 101 may comprise a repositionable adhesive. As described here, repositioning of the sanitary dressing 100 over the main dressing 2 is permitted. In examples of the sanitary dressing system, the main dressing 2 may comprise a main adhesive for adhering to the skin 10, and the main adhesive and the adhesive 160 of the proximal zone 101 may have different properties. The properties may be related to at least one of the following: composition, pattern, coating weight, peel value, MVTR value, or any combination thereof. In examples of the sanitary dressing system, the proximal zone 101 may have a lower peel strength than the main dressing. For instance, the peel strength of the main dressing, due to the characteristics of the main adhesive, may be higher than 0.6 N / 10 mm. In examples of the medical dressing system, the proximal zone 101 may have a higher MVTR value than the primary dressing. By way of example, the MVTR value of the primary dressing may be due to, for instance, the characteristics of the primary adhesive. As mentioned here, the patient's skin can breathe despite having two overlapping dressings—the primary dressing and the proximal zone—adhered to it. Although only a few examples have been described here, other alternatives, modifications, uses, and / or equivalents are possible. Furthermore, all possible combinations of the described examples are also covered. Therefore, the scope of this description should not be limited by particular examples but should be determined solely by a reasonable reading of the following claims. If a claim contains parenthetical references, these are solely for the purpose of enhancing the clarity of the claim and should not be construed as limiting its scope.

Claims

CLAIMS 1. A sanitary dressing for protecting a portion of a catheter protruding from a patient's body through a skin entry site, characterized in that it comprises: a proximal zone for placement on a main dressing that is in contact with the patient's skin, the proximal zone comprising a polyurethane-compatible adhesive to allow repositioning of the sanitary dressing on the main dressing; a distal zone and an intermediate zone between the proximal and distal zones, thus forming a sheath for receiving the portion of the catheter.

2. The sanitary dressing according to claim 1, further characterized in that the adhesive covers only a part of the surface of the proximal area.

3. The sanitary dressing according to claim 1 or 2, further characterized in that the adhesive comprises a plurality of parallel adhesive strips.

4. The sanitary dressing according to any of claims 1 to 3, further characterized in that the coating weight of the adhesive is greater than 50 g / m2.

5. The sanitary spondyle in accordance with any of claims 1 to 4, further characterized in that the proximal zone has an MVTR greater than 1500 g / (m2 x 24 h).

6. The sanitary dressing according to any of claims 1 to 5, further characterized in that the adhesive has, in a temperature range between 34°C and 37°C, a Storage Modulus (G') of approximately 6200 - 8000 Pa, more preferably approximately 6450 - 7570 Pa; a Loss Modulus (G) of approximately 3500 - 8000 Pa, more preferably approximately 3989 - 7436 Pa; a Loss Factor [tan (G / G')] of approximately 0.35 to 1.2, more preferably approximately 0.62 - 0.

99.

7. The sanitary dressing according to any of claims 1 to 6, further characterized in that the sheath comprises: a first opening disposed between the proximal zone and the intermediate zone to allow the portion of the catheter protruding from the skin entry site to be housed in the sheath; and a separable junction that closes the distal zone and forms a second opening when separated.

8. The sanitary dressing according to any of claims 1 to 7, further characterized in that the dressing comprises an outer sheet and an inner sheet joined by junctions in the intermediate and distal areas to form the sheath.

9. The sanitary dressing according to claim 8 when dependent on claim 7, further characterized in that the joints of the distal zone are different from the joints of the intermediate zone such that the joints of the intermediate zone form stops that limit the opening of the second opening when separating the separable joint.

10. The sanitary dressing according to claim 8 or 9, further characterized in that the junctions of the intermediate zone are continuous and the junctions of the distal zone are discontinuous.

11. The sanitary dressing according to any of claims 1 to 10, further characterized in that the cover comprises an auxiliary adhesive fixation system. zezenn / zznz / E / YiAi 12. The sanitary dressing according to any of claims 1 to 11, further characterized in that the cover comprises a material that is at least one of hydrophobic, waterproof or superhydrophobic.

13. The sanitary dressing according to any of claims 1 to 12, further characterized in that the intermediate zone is funnel-shaped or bell-shaped.

14. The sanitary dressing according to any of claims 1 to 13, further characterized in that it comprises, in addition, a pull tab at the distal end to facilitate separation of the separable bond.

15. The sanitary dressing according to any of claims 1 to 14, further characterized in that it comprises an antiseptic coating such as polyhexanide, chlorhexidine or silver.

16. The sanitary dressing according to any of claims 1 to 15, further characterized in that it comprises a detachable separable sheet in the proximal area to protect the adhesive.

17. The sanitary dressing according to any of claims 1 to 16, further characterized in that the dressing is disposable.

18. The Sanitary Dressing according to any of claims 1 to 17, further characterized in that the proximal zone has a detachment value of less than 0.6 N / 10 mm.

19. A sanitary dressing system, characterized in that it comprises: a main dressing for securing a catheter protruding from a patient's body through a skin entry site, and for covering the skin entry site; a sanitary dressing as claimed in any of claims 1 to 18.

20. The sanitary dressing system according to claim 19, further characterized in that the main dressing and the sanitary dressing are independent of each other.

21. The sanitary dressing system according to any of claims 19 to 20, further characterized in that the proximal area comprises a repositionable adhesive.

22. The sanitary dressing system according to any of claims 19 to 21, further characterized in that the main dressing comprises a main adhesive for adhering to the skin, and the main adhesive and the proximal zone adhesive have different properties.

23. The sanitary dressing system according to claim 19 to 22, further characterized in that the proximal zone has a lower detachment value than the main dressing.

24. The sanitary dressing system according to any of claims 19 to 23, further characterized in that the proximal zone has a higher MVTR value than the main dressing.

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