2.2
De enige onafhankelijke conclusie 1 en volgconclusies 2 t/m 6 en 11 zoals verleend luiden in de oorspronkelijke Engelse taal als volgt:
1. A urinary catheter assembly comprising at least one urinary catheter (1) having on at
least a part of its surface a hydrophilic surface layer (6) intended to produce a low-friction
surface character of the catheter by treatment with a liquid swelling medium prior to use of
the catheter and a catheter package (7, 16, 29, 34, 42, 46, 51, 51’) having a cavity (11,18,
39, 48, 53) for accommodation of the catheter (1, 58, 69), characterized in that the cavity
accommodates said liquid swelling medium for provision of a ready-to-use catheter
assembly.
2. A catheter according to claim 1, characterized in that the catheter package (7,) as a whole
is made of a gas impermeable material.
3. A urinary catheter assembly as claimed in claim 2, characterized in that the catheter
package (7) is formed from two sheets (8, 9) of gas impermeable film material connected
with each other by a gas impermeable joint (10) defining the cavity (11) for accommodating
the catheter (1) and the liquid swelling medium.
4. A urinary catheter assembly as claimed in claim 3, characterized in that the catheter
package (7) is of a general elongate shape with said joint (10) arranged to define said
cavity (11,) to accommodate the catheter (1) in a substantially linear orientation.
5. A urinary catheter assembly as claimed in claim 3 or 4, characterized in that said joint
(10) is arranged 10 [kennelijk is bedoeld ‘to’ — hof] provide said cavity (11) with a
cross-section narrowly surrounding the catheter (1).
6. A urinary catheter assembly as claimed in any of claims 3 to 5, characterized in that said
joint (10) is a welding joint.
11. A urinary catheter assembly as claimed in any of the preceding claims, characterized in
that said liquid swelling medium is selected from the group comprising an aqueous solution,
an isotonic aqueous solution, an isotonic aqueous solution of sodium chloride and sterile
water.
In de niet bestreden Nederlandse vertaling luiden deze conclusies als volgt:
1. Urinekathetersamenstel welke ten minste een urinekatheter (1) omvat met op ten minste
een deel van het oppervlak daarvan een hydrofiele oppervlaktelaag (6) welke bedoeld is
om een wrijvingsarm oppervlaktekarakter van de katheter op te leveren door behandeling
met een vloeibaar zwelmedium voor gebruik van de katheter en een katheterverpakking (7,
16, 29, 31, 42, 46, 51, 519 met een holte (11, 18, 39, 48, 53) voor het opnemen van de
katheter (1, 58, 69), met het kenmerk dat de holte dat vloeibare zwelmedium opneemt om te
voorzien in een gebruiksklaar kathetersamenstel.
2. Urinekathetersamenstel volgens conclusie 1, met het kenmerk dat de katheterverpakking
(7) in haar geheel is gemaakt van een niet-gasdoorlatend materiaal.
3. Urinekathetersamenstel volgens conclusie 2, met het kenmerk dat de katheterverpakking
(7) is gevormd van twee vellen (8, 9) van niet-gasdoorlatend foliemateriaal die met elkaar
zijn verbonden door een niet-gasdoorlatende verbinding (10) welke de holte (11) voor het
opnemen van de katheter (1) begrenst.
4. Urinekathetersamenstel volgens conclusie 3, met het kenmerk dat de katheterverpakking
(7) een in hoofdzaak langgerekte vorm heeft waarbij die verbinding (10) is aangebracht om
die holte (11) voor het opnemen van de katheter (1) te begrenzen in een in hoofdzaak
lineaire richting.
5. Urinekathetersamenstel volgens conclusie 3 of 4 met het kenmerk dat die verbinding
(10) is aangebracht om die holte (11) te voorzien van een dwarsdoorsnede welke de katheter
(1) nauw omsluit.
6. Urinekathetersamenstel volgens een van de conclusies 3 tot 5, met het kenmerk dat
die verbinding (10) een lasverbinding is.
11. Urinekathetersamenstel volgens een van de voorgaande conclusies, met het kenmerk dat
dat vloeibare zwelmedium wordt geselecteerd uit de groep welke een oplossing in water, een
isotonische oplossing in water, een isotonische oplossing in water van natriumchloride en
steriel water omvat.
2.4
Ook tegen de verlening van EP 729 is door verschillende partijen
oppositie ingesteld. Bij beslissing van 11 december 2008 heeft de Oppositie Afdeling van
het Europees Octrooibureau (hierna: OD) EP 729 herroepen wegens ‘insufficient disclosure’
(niet-nawerkbaarheid; artikel 100 (b) Europees Octrooiverdrag, hierna: EOV). Coloplast is
van die beslissing in beroep gekomen. De TKB heeft dit beroep bij beslissing van 28
september 2011 (T 0468/09) gegrond verklaard en de zaak terugverwezen naar de OD voor
verdere afdoening op basis van een aangepaste set conclusies. Vervolgens heeft de OD, bij
beslissing van 18 januari 2013, EP 729 wederom herroepen, ditmaal op grond van strijd
met artikel 123 lid 2, 76 en 84 EOV (onder meer toegevoegde materie). Van die uitspraak is
Coloplast andermaal in beroep gekomen. De TKB heeft ook dit beroep, bij beslissing van 27
februari 2014 (T 0801/13), gegrond verklaard en de zaak terugverwezen naar de OD voor verdere beoordeling. Op dat moment is Medical4You in de oppositieprocedure
tussengekomen bij brief van 26 maart 2015 en heeft zij haar zienswijze ten aanzien van de
geldigheid van het octrooi naar voren gebracht.
2.9
De tijdens oppositie aangepaste beschrijving (B2 tekst) van het octrooi bevat onder meer de navolgende paragrafen:
[0001] This invention relates to at least one urinary catheter assembly comprising a urinary catheter having on at least a part of its surface a hydrophilic surface layer intended to produce a low-friction surface character of the catheter by treatment with a liquid swelling medium prior to use of the catheter and a catheter package made of a gas impermeable material and having a cavity for accommodation of the catheter.
[0003] US-A-3,648,704, US-A-3,967,728, US-A-4,269,310, GB-A-2,284,764 and EP-A-0 677 299 disclose a conventional urinary catheter assembly comprising a catheter of the kind where prior to insertion of the catheter into the urethra the tip of the catheter is to be lubricated with a gel-like lubricant and a package where such a lubricant is accommodated in a rupturable pouch connected with or located within the package itself adjacent to the tip of the catheter or supplied together with the catheter package for connection therewith prior to use of the catheter.
[0004] An important feature of any urinary catheter used for intermittent catherisation of the bladder of an incontinent user is the ability of the catheter to slide easily through the urethra without exposing the urethral walls to any risk of damage. Catheters of the kind to which the inventions pertains have been developed to meet this need by imparting an extremely low friction character to at least the part of the surface of the catheter which is actually introduced into the urethra. The low friction surface character is obtained by incorporating into the relevant part of the catheter at least a hydrophilic surface layer, typically in the form of a coating, and exposing this layer or coating to contact with a liquid swelling medium immediately prior to use.
[0005] In order to maintain the low friction surface character during location of the catheter in the urethra and subsequent with drawal therefrom and hereby reduce stinging pain it is further known to incorporate an osmolality promoting agent, such as NaCI, in the hydrophilic coating.
[0006] When catheters of this kind are used directly by end users outside the medical environment of a hospital or a clinic, e.g. by or tetraplegic patients who often have a very poor dexterity, and therefore need a very simple insertion procedure, the most common liquid swelling medium used for preparation of the catheter immediately prior to use would be normal tap water.
[0007] In order to reduce the risc of infection inherent with the performance of intermittent catherisation of the bladder both the actual swelling medium used and the environment in which the catherisation is performed need, however, to be as clean and antiseptic as possible. Evidently, this need may be very difficult to meet in many daily life situations, as where catherisation must be performed outside the users normal daily environment, e.g. in public toilets, where neither the water supply nor the general state of cleanliness can be expected to be of a sufficiently high standard. Moreover, many disabled users have severe difficulties in entering available toilet rooms due to simple physical barriers like narrow access ways, stairs and the like.
[0008] On this background, it is the object of the invention to improve and facilitate the performance of intermittent urinary catherisation in any type of environment by providing a ready to use urinary catheter assembly comprising a catheter which can be withdrawn from its package and is prepared for direct insertion in the urethra and in a substantially sterile condition, whereby the general quality of life for users of intermittent catherisation would be greatly improved.
[0009] In order to meet this and other objects of the invention, as set forth in the following, a urinary catheter assembly according to claim 1 is provided.
[0010] The term "gas impermeable" material should be understood in this context to mean any material that will be sufficiently tight against diffusion by evaporation of the actual liquid swelling medium for a period exceeding the recommended shelf life time of the catheter assembly which could be up to five years, typically 36 months.
[0011]In a first series of embodiments of the urinary catheter assembly of the invention the catheter package as a whole is made of a gas impermeable material and the compartment for the liquid swelling medium is in liquid flow communication with the cavity for accommodation of the catheter.
[0023] In order to maintain the swelling medium in liquid state until the actual preparation of the catheter the liquid swelling medium is confined in the embodiment shown in a storage body 14 which as described above may be of a spongy or gel-like material located in the compartment or end section 12.
[0025] Prior to the intended use of the catheter 1 the hydrophilic surface coating 6 is prepared to activate its low friction character by applying an external pressure to the end section or compartment 12 to squeeze the liquid swelling medium out from the spongy body and allow it to flow into the cavity 11. (…).
[0026] The period needed for preparation of the hydrophilic surface coating 6 will typically be about 30 seconds and subsequently the catheter 1 may be withdrawn from the package 7 in a ready to use condition.
[0029] Due to the gas-impermeability of the package 7 it is not necessary to use a body 14 of spongy material to accommodate the liquid swelling medium. The swelling medium may be introduced in the package during the assembling operation prior to completion of the welding and will thereby immediately prepare the hydrophilic coating. The package will itself prevent the coating from drying out and preserve the low friction character of the surface coating to keep the catheter in a ready to use condition at all times. This would have the inherent advantage that no preparation step is required immediately prior to use, whereby the operation will be reduced to opening of the package 7 for immediate withdrawal of the catheter without the delay resulting from the required preparation period.
Technische achtergrond en stand van de techniek
2.15
Omdat Coloplast zich niet beroept op de eerste prioriteitsdatum behoort ook tot de stand van de techniek PCT-aanvrage WO 96/30277, gepubliceerd op 3 oktober 1996. Deze publicatie (hierna: Rødsten, D4 in de oppositieprocedure) heeft betrekking op een 'Applicator and method for use in non contaminating application of a medical catheter for insertion into a body canal, in particular a urethra catheter, and of the kind provided with a friction-reducing surface coating' (p. 1, r. 3 t/m r. 7). Rødsten ziet niet zozeer op de katheter maar met name op de verpakking van een katheter. De publicatie openbaart een katheterverpakking met behulp waarvan verplegend personeel of de patiënt zelf een katheter veilig, eenvoudig, steriel en zonder aanraken uit de verpakking kan verwijderen en kan inbrengen, als gevolg waarvan infectiegevaar afneemt (p. 1, r. 36 t/m p. 2, r. 31). Rødsten beschrijft dat de katheterverpakking bijvoorbeeld geschikt is voor gebruik met een katheter met een hydrofiel oppervlak waarbij het vloeibare zwelmedium na opening van de verpakking eenvoudig in de verpakking kan worden geïntroduceerd (p. 2, r. 32 t/m p. 3, r. 5):
In order to help the user to help himself as much as possible, the applicator can, when used in connection with catheters of the kind where the friction-reducing surface coating is activated by moistening with water immediately before the application, according to an advantageous further development of the invention, be provided with instructions for initial separation of local parts of the two walls merely at said first zone or a remote second zone of the edge joint in order to permit preparation of the catheter by introduction and removal of a moistening medium through the thus formed aperture prior to the application of the catheter.
Van dit type katheters zegt Rødsten (p. 3, r. 6 t/m r. 7) dat zij 'well known per se ' zijn, onder andere uit EP-B-0217771 (hierna: EP 771). EP 771 heeft betrekking op urinekatheters met een hydrofiele coating. EP 771 wordt genoemd in paragraaf [0002] van EP 729. Het vloeibare zwelmedium is volgens Rødsten 'preferably water, isotonic salt water or alike '. Behalve voor deze 'droog verpakte' hydrofiele katheters openbaart Rødsten dat de katheterverpakking ook geschikt is voor andersoortige uit de stand van de techniek bekende katheters anders dan hydrofiele katheters die worden geactiveerd met een vloeibaar zwelmedium (p. 8, r. 30 t/m r. 35):
The method and the applicator according to the invention is not restricted to use in connection with a catheter of the kind which requires moistening prior to the application, but may to the same extent be used with a catheter which is packed in a ready-for-insertion state.
De katheterverpakking van Rødsten kan bestaan uit plastic, bijvoorbeeld polyethyleen, gaspermeabel papier, maar ook uit 'other suitable foil materials in the form of single-layer foils or laminates of plastic, metallic foils and/or paper' (p. 5, r. 33 t/m p. 6, r. 8). Bij verpakking van metaalfilm zijn ten behoeve van gassterilisatie openingen aangebracht (p. 7, r. 14 ev.).
2.17
Coloplast heeft op 19 november 1999 een octrooiaanvrage ingediend voor ‘a method for sterilising a medical device having a hydrophilic coating’. Dit octrooi is op 19 februari 2003 verleend onder nummer EP 1 131 112 (hierna: EP 112). EP 112 ziet - kort gezegd - in het bijzonder op de stabiliteit van de hydrofiele coating bij sterilisatie van de katheter door bestraling. In de beschrijving zijn onder meer de navolgende paragrafen opgenomen:
Onder het kopje “Description of the Related Art”:
[0014] lt has been found, however, that most hydrophilic coatings lose their water retention and that the coefficient of friction increase when the coatings are stored in water for an extended period of time and/or particulary after sterilisation using irradiation or autoclaving.
[0015] Thus, there is still a need for a hydrophilic coating retaining water retention and low coefficient of friction when the coatings are stored in water for an extended period of time and/or particularly after sterilisation using irradiation or autoclaving.
Onder het kopje “Summary of the Invention”:
[0016] The present Invention relates to a method for sterilising a medical device comprising a hydrophilic coating using radiation.
[0017] Furthermore, the invention relates to a sterilised set comprising a medical device provided with a hydrophilic coating and an aqueous liquid for wetting the hydrophilic coating.
[0018] Still further, the invention relates to a method of protecting the hydrophilic coating of a medical device having such coating during sterilising using radiation.
Onder het kopje “Detailed Description of the Invention”:
[0021] lt has surprisingly been found that the water retention can be increased dramatically and the coefficient of friction can be kept low by adding hydrophilic polymers (…) to the liquid for wetting a hydrophilic coating and that these compounds also protect these properties during exposure to sterilisation using radiation when wetted with such wetting liquid.