Abstract: The present disclosure relates to a catheter device comprising a catheter hub in which a valve member is disposed, a needle fixed in a needle hub, the needle extending through the valve member in the catheter hub in a ready position, and a tubular receptacle in which the needle hub is displaceably guided and biased by a spring in a proximal direction relative to the receptacle, wherein the needle hub is releasably held in the ready position in the receptacle against the force of the spring by frictional force between needle circumference and catheter or catheter hub, which frictional force is reduced on retraction of the needle through the catheter hub such that the force of the spring prevails.

Abstract: According to embodiments of the present application, a color changeable dye can comprise a redox indicator, a reduction reaction initiator, an electron donor, an oxygen scavenger, an indicator barrier agent, a thickening agent and an agent to facilitate mixing. The color changeable dye is a first color in the presence of oxygen, capable of changing to a second color upon reduction in a substantially oxygen free environment, and capable of changing back to the first color after exposure to oxygen for a period of time corresponding to the intended use time of a disposable or limited use product. Methods of making and using the color changeable dye and apparatuses incorporating such dye are also disclosed.

Abstract: The present invention concerns a medical pump comprising: a. A hard housing comprising a top (24) and bottom (1) hard shells, within which a rigid wall (3) and a movable membrane (2) create three distinct chambers; wherein i. said movable membrane tightly separates said second (29) and third (22) chambers ii. said first and third chambers have a watertight interface iii. said second chamber (29) is designed to contain a fluid iv. said first chamber (23) comprises a first venting mean (20) which is arranged to provide a fluidic communication between said first chamber (23) and the external environment; v. said third chamber (22) comprises a second venting mean which is arranged to provide a fluidic communication between said third chamber (22) and the external environment b. A pumping element (4) located in the first chamber (23) c. A least one pressure sensor which measure the pressure gradient between the first chamber (23) and the second chamber (29) d. A fluid pathway which permits: i.

Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. Methods, systems, and articles of manufacture for automatically detecting an occlusion in a medication infusion pump are provided. The electrical current to an infusion pump may be measured. Based on measurements of one or more variables, such as force, the infusion pump detects whether there is an occlusion in the system. The methods of detecting occlusions may be dynamic.

Abstract: Systems and methods for alignment and detection of a consumable component are disclosed herein. For example, a method for determining if a consumable component is coupled to a durable component to enable dispersion of a medicine is provided. The method includes determining if a signal from an electrical contact coupled to a durable component has changed an electrical state, and comparing the signal to a reference signal from a second electrical component coupled to the durable component. The method includes sampling a sensor coupled to the durable component to acquire sensor data indicative of a magnetic field observed by the sensor, and outputting data that a consumable component is coupled to the durable component if the signal is different than the reference signal, and the sensor data is within an acceptable range.

Abstract: An infusion pump assembly includes a locking tab and a pump barrel inside a pump barrel housing, where the pump barrel accommodates a reservoir assembly. The reservoir assembly includes a reservoir and a plunger rod. The infusion pump assembly also includes a locking disc at a terminus of the pump barrel. The locking disc includes a clearance hole for the plunger rod. The locking disc also includes at least one locking tab notch in close proximity with the locking tab. The locking tab is in moveable engagement with the locking tab notch, and the reservoir moves the locking tab from a locked position to an unlocked position when the plunger rod is inserted through clearance hole. The locking disc rotates upon torque being applied to the reservoir assembly, the locking disc rotating from a non-loaded position to a loaded position with respect to the plunger rod and a drive screw.

Abstract: A pen needle hub and cover for a pen needle assembly that provides tactile and/or audible indicia of proper attachment between the hub of the pen needle and the pen is provided. Such indicia substantially prevent under- and over-torquing of the pen needle. The tactile indicia may include a user sensing a wave of a torque of peak value followed by a torque of lesser value.

Abstract: An autoinjector is provided with a magnetically operated “injection complete” indicator. A moveable magnet (44) associated with the drive piston (38) is kept at one end of a recess by a soft iron keeper (46) until the drive piston reaches its formal position where the moveable magnet (44) is attracted to impact a magnet (48) on the housing to generate an audible click. Also described is a spring finger (52) that slips behind the rear edge of the syringe boot (50) temporarily to hold the end of the boot well clear of the housing to that it can be gripped for removal.

Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. A method, system, and an article of manufacture for automatically detecting an occlusion in a medication infusion pump is provided. The electrical current to an infusion pump is measured. Based on measurements of one or more variables, the infusion pump detects whether there is an occlusion in the system. The methods of detecting occlusions may be dynamic.

Abstract: A liquid transport apparatus includes a tube for constituting a flow channel transporting a liquid, plural fingers that push and block the tube, a cam that pushes the fingers in sequence so as to squeeze the tube to transport the liquid, a catheter for injecting the liquid into a living body, a first electrode that is provided further toward the downstream side than a region pushed by the plural fingers and is made to come into contact with the liquid, a second electrode made to come into contact with the living body, and a determination unit that determines that the catheter comes off the living body on the basis of the impedance between the first electrode and the second electrode.

Abstract: An injection device for injecting automatically a medicament comprises an occlusion detection system with a force measurement unit and two separate occlusion detectors. The occlusion detectors take force measurements at different respective measurement rates and generate occlusion indicating signals based on a set of force measurements taken at the respective measurement rates. The injection device further comprises an alarm generator for generating an occlusion alarm signal in cases where either or both of the occlusion detectors generate an occlusion indicating signal. The two occlusion detectors operating at different measurement rates make it possible to detect occlusions more reliably over a broader range of delivery rates.

Abstract: A syringe pump provides a controlled metering of the medicament from a syringe by movement of the syringe plunger while also measuring flow from the syringe with a flow sensor. Simultaneous monitoring of flow command implicit in control of the syringe plunger and an actual flow provides additional safety and detection of irregularities in the delivery of the medicament.

Abstract: A needle-protection device (2) for a syringe (1) includes a protector support (120) having at least one recess (126A) that extends therethrough and at least one rib (170) that extends across at least a portion of the recess. The rib is generally centrally positioned within the recess. A needle protector (22) has an inner diameter that is at least slightly greater than an outer diameter of the protector support, such that at least a portion of the protector support can be inserted within at least a portion of the needle protector. At least one hook (56) extends radially inwardly from the needle protector. The needle protector is rotatable with respect to the protector support such that the at least one hook snaps over the at least one rib and locks the rotational position of the protector support with respect to the needle protector.

Abstract: An injector or applicator is used for dispensing a liquid or pasty drug. It comprises an injector body (1), a piston body (2) and a closing cap (3). The closing cap (3) has a cap portion and a connecting portion. The cap portion is used for closing the opening of the injector or applicator. The connecting portion is used for connecting the closing cap (3) with the injector or applicator. The cap portion and the connecting portion are releasably connected by a tear edge. To create an improved tamper-proof feature, the housing portion (1) has an undercut, and the piston body (2) has a protrusion (FIG. 6).

Abstract: An enteral feeding set for an enteral feeding pump having a control system for controlling operation of the pump to supply nutrient liquid to a patient through the enteral feeding set loaded in the pump, a source of electromagnetic radiation operatively connected to the control system of the pump for emitting electromagnetic radiation, and an electromagnetic radiation detector operatively connected to the control system for receiving the electromagnetic radiation and providing an indication to the control system that the feeding set is properly loaded in the pump. The feeding set includes a conduit for carrying nutrient liquid to a patient. A safety interlock includes a light pipe for providing a passage of the electromagnetic radiation from the source of electromagnetic radiation to the electromagnetic radiation detector only when the safety interlock is loaded in the pump such that nutrient liquid flow to the patient is regulated by the pump.

Abstract: An infusion set or patch pump is provided for delivering a pharmaceutical agent, such as insulin, to a patient. The infusion set or patch pump has a recessed portion in the bottom face containing a hydrogel and a reactant capable of producing a color change upon contact with the pharmaceutical agent. The reactant includes a mixture of potassium persulfate and 4-aminoantipyrine and optionally horseradish peroxidase, and produces a rapid visually detectable color change when contacted with phenol and/or m-cresol contained in insulin as stabilizing agents.

Abstract: A fluid medicament delivery device includes a patient attachment unit, containing the fluid medicament, and an indicator unit adapted to be detachably coupled to the patient attachment unit. A method for monitoring the fluid medicament includes independently setting a flow rate of a fluid medicament with the patient attachment unit. A pressure and/or a flow rate of the fluid medicament is sensed with a sensor located in a separate indicator unit in a sensing mode. A status of the fluid medicament delivery device is determined based at least in part on the pressure and/or the flow rate.

Abstract: Implantable infusion devices and systems with side port access detection capability and methods of detecting side port access.

Abstract: The present invention inter alia relates to an apparatus, comprising a detecting arrangement comprising a first and a second detecting unit, wherein the detecting arrangement is configured to at least detect a partial attaching of an attachable unit to the apparatus and a complete attaching of the attachable unit to the apparatus, wherein the attachable unit is configured to be removably attached to the apparatus, and wherein the detecting arrangement is configured to only enable at least one function of the apparatus, when a complete attaching of the attachable unit to the apparatus is detected.

Abstract: A method of preparing at least part of a medical device for application and a medical assembly for preparing or storing the at least one disposable unit of the medical device is presented. The medical assembly comprises a chemical or physical monitoring device for counting and/or displaying a time period of application and/or time remaining before required disposal or replacement of the disposable unit. The monitoring device is automatically activated by moving the at least one disposable unit relative to a second unit of the medical assembly for preparing or positioning the disposable unit for use with the medical device; assembling the at least one disposable unit and the medical device; and/or withdrawing the disposable unit of a storage compartment of the second unit.

Abstract: A medical device comprising a wall, a coating of SiOx, and a piezochromic material is disclosed. The piezochromic material is associated with the wall, and changes its appearance when the wall is exposed to mechanical stress exceeding a threshold intensity. Also disclosed is a method of interrogating a closed medical device for processing damage, comprising at least the acts of providing a closed medical device and inspecting the medical device. The medical device is inspected from the exterior for a change in the appearance of at least some of its piezochromic material that is characteristic of exposure of the wall to mechanical stress exceeding a threshold intensity greater than zero. Optionally in any embodiment inspecting is carried out using a spectrophotometer to determine the change in the color of at least some of its piezochromic material.

Abstract: The present invention relates to a drug delivery device for administering a dose of a medicament, comprising of a first housing component; a second housing component releasably interconnectable with the first housing component in a locked configuration, in which the second housing component covers a dispensing end of the device; and a safety lock member to mechanically engage with the first and with the second housing component in order to inhibit unintentional release of first and second housing component.

Abstract: A priming indicator for a fluid infusion system includes a luer cap or other component of the infusion system having an indicator surface covered by a membrane. The membrane exhibits a first visual characteristic, such as being opaque, when dry and exhibits a second characteristic, such as becoming less opaque, when wet. Once the membrane becomes wet, indicia on the surface, which may be provided on a rod at least partially covered by the membrane, becomes visible, thereby indicating an intravenous tube to which the luer cap is secured has been primed or is nearly primed. The indicator may alternately be employed at an upstream end of an infusion set, such as at the port of a medical bag providing a supply of fluid, to indicate a low level of fluid in the medical bag.

Abstract: A container of an injectable solution is disclosed herein including various sensors, electrodes, a memory device, and other features that monitor the process of extraction or injection of the content of the container to ensure it is completed successfully in an automated manner, such as in an automatic injecting device.

Abstract: The present invention monitors an IV bag injection port and informs the user of prior injections. The present invention employs an object and/or a sealed chamber within a transparent IV fluid bag injection port. In the case of the object, notification of prior use is achieved when the object's or IV fluid's appearance is altered. With respect to the sealed chamber, the chamber's seal is breached to allow fluid to pass between the chamber and the IV bag to change the appearance of the contents of the chamber. Since the injection port and bag walls are at least partially transparent, medical personnel are able to observe the altered appearance of either the object, IV fluid or the sealed chamber.

Abstract: A pen needle assembly includes a cap for covering the non-injection end of a needle of a pen needle. The needle is received by a hub, which is disposed in an outer cover. The cap is adapted to be connected to the outer cover in a first or second position. The cap is removable in the first position and the cap is locked to the outer cover in the second position.

Abstract: A replaceable cap (10) for a transdermal liquid dosing device) such as an insulin pen is provided. The cap includes an elongate hollow body (14) with a first open end (16) which can be placed over a front part (26) of the dosing device and a second closed end (18) opposite the first end. The cap body also includes a cavity which opens into the interior (50) of the cap body and which houses a control unit (52) which includes a timer unit, a switch mechanism (56) that stands at least partially proud of the cavity so as to project into the interior of the body, and a timer display unit (58) which displays time counted by the timer unit on an outer surface of the body of the cap.

Abstract: A device for detecting moisture for an arrangement for monitoring an access to a patient for a system by which, via a flexible line, a liquid is fed to a patient and/or a liquid is fed out from the patient, and in particular for monitoring the vascular access in extra-corporeal blood treatment and particularly for monitoring a central venous catheter for acute dialysis includes at least a portion which can be deformed into a sleeve and placed around the circumference of the flexible line or of a connecting system. The portion in sleeve form has fastening means for fixing it in place in the position in which it surrounds the flexible line or the connecting system. The portion in sleeve form allows the device to be fastened quickly and securely to a flexible line or a connecting system.

Abstract: A moisture sensor for monitoring an access to a patient for a system by which, via a flexible line, a liquid is fed to and/or out from a patient, for monitoring the vascular access in extra-corporeal blood treatment or for monitoring a central venous catheter for acute dialysis, and a method of producing a moisture sensor are described. The moisture sensor has a substrate material with an electrically conductive structure having conductor paths arranged at a distance from one another and connected together across a terminating resistor. The terminating resistor is an electrically conductive film which is applied in a section of the substrate material on which are formed electrical contacting regions for connecting the terminating resistor to the conductor paths, such that an external terminating resistor is not required and the moisture sensor can be produced easily in large numbers complete with the terminating resistor.

Abstract: A device for detecting moisture for an arrangement for monitoring an access to a patient for a system by which, via a flexible line, a liquid is fed to and/or out from the patient, for monitoring the vascular access in extra-corporeal blood treatment and for monitoring a central venous access in acute dialysis, an arrangement for monitoring an access to a patient, and a method of producing a device for detecting moisture for connection to a monitoring arrangement are described. The device for detecting moisture is characterised in that at least a part or portion of the device takes the form of a resilient attaching element having parts which fit round a flexible line and/or a system for connecting a flexible line. The attaching element, which is formed after the fashion of a clip, allows the device for detecting moisture to be attached quickly and securely to a flexible line.

Abstract: A safety syringe that effectively prevents the administration of an injection in excess of a maximum injection pressure, and that provides a clear, immediate tactile feedback to the practitioner each time a maximum injection pressure is exceeded. The practitioner is provided a predetermined number of attempts to inject fluid without exceeding the maximum injection pressure, each time receiving a direct tactile feedback in the form of a ratcheting click within the plunger assembly of the syringe. After a final attempt, the next over-pressure event causes a disconnect between the thumb plate of the syringe and the piston that engages the fluid within the syringe barrel, positively prevent a potentially harmful injection. In an illustrative embodiment, the plunger assembly includes a distal portion connected to the piston and a proximal portion, connected to the thumb plate.

Abstract: The invention relates to an injection device for delivering a drug, comprising a housing arranged to receive a drug container and an electrical energy source, wherein a driver is arranged to displace a dose of the drug from the container under load of a drive spring upon release, wherein an electric motor powered by the electrical energy source is arranged for tensioning the drive spring, wherein control means are arranged for controlling the electric motor so as to tension the drive spring when an injection has been performed.

Abstract: A syringe includes a syringe outer tube having a spout and a spout-mounted cap. The cap has a cap main body sealing the spout in a liquid-tight manner, a mounting section mounted onto the spout, and a breakable breaking section linking the cap main body and the mounting section to release the link upon breaking. The inner circumferential portion of the mounting section includes protrusions inserted into a groove on the outer circumferential portion of the spout which also has a tilted section tilted relative to the axis of the spout outer circumferential portion. When the cap is rotated along the axial direction of the syringe outer tube, the protrusions move along the tilted section of the groove. The mounting section is thus displaced in the base end direction and the braking section is pulled in the direction and breaks to separate the cap main body from the mounting section.

Abstract: The present invention relates to a drug delivery device for administering a dose of a medicament by way of injection, the device comprising of a housing to receive a cartridge at least partially filled with a medicament and being sealed with a piston slidably disposed therein, a drive mechanism having a piston rod to be displaced in a distal direction to operably engage with the piston of the cartridge, an actuation means operably engaged with the drive mechanism to prepare and/or to initiate a dose dispensing action of the drive mechanism, and a protective member adapted to impede actuation of the actuation means, wherein the protective member is releasably connected to the housing by means of a breakable seal.

Abstract: A delivery device includes first and second housing portions that selectively engage and disengage. A reservoir on one housing portion operatively engages a drive device and/or a needle inserting device on the other housing portion. Upon proper engagement of the housing portions, the reservoir operatively couples to the drive device and/or the needle inserting device. A first magnet on the first housing portion and a second magnet (or a magnetically-attractive material) on the second housing portion are positioned to magnetically interact with each other, upon operative engagement of the housing portions. A third magnet on the second housing portion may be opposed to the first magnet to help align the housing portions for connection. A magnet-responsive device may be on one or both housing portions to detect alignment and/or connection of the housing portions.

Abstract: A medicine injection device comprises a cartridge having a cartridge barrel and a plunger having a plunger shaft slidable within the cartridge barrel. The cartridge may have, e.g., a pre-filled medicine. The medicine injection device farther comprises a body having a proximal end, a distal end, and a cavity in which the cartridge barrel is disposed. The proximal end of the body may optionally form a finger grip. The medicine injection device further comprises a plunger locking mechanism attached to the proximal end of the body. The plunger locking mechanism comprises a member with an aperture slidably engaged with the plunger shaft. The locking mechanism is configured for preventing the plunger from being removed from the cartridge barrel. For example, the plunger shaft may include a locking stop, e.g., a flange, that engages with the aperture in an interference arrangement.

Abstract: A dialysis system comprising: a blood circuit including a blood pump, a dialyzer, and an air removal apparatus; an arterial line of the blood circuit extending from the blood pump to an arterial access needle; a venous line of the blood circuit extending from the air removal apparatus to a venous access needle; arterial and venous conductive connections placed along the arterial and venous lines, respectively; a first electrical potential source configured to apply a first electrical potential between (i) the arterial and venous conductive connections and (ii) the arterial and venous access needles; and a second electrical potential source configured to apply a second electrical potential between (a) the arterial and venous conductive connections and (b) one of the blood pump, dialyzer or air removal device.

Abstract: An auto-injector for administering a dose of a liquid medicament is presented that has a tubular chassis telescopable in a tubular case, a carrier subassembly comprising a tubular carrier slidably arranged relative to the chassis inside the case, where the carrier adapted to contain a syringe with a hollow injection needle. The injector has a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier. There is also a trigger button arranged distally or laterally in or on the case, a control spring arranged around the carrier, and a needle extension control mechanism for coupling a proximal end of the control spring to either the carrier for advancing it for needle extension or to the chassis for needle retraction depending on the relative axial position of the carrier and the chassis.

Abstract: An auto-injector for administering a dose of a liquid medicament (M) is presented having a tubular chassis telescopable in an elongate chassis, a carrier subassembly comprising a tubular carrier slidably arranged partially inside the chassis and inside the case, where the carrier is adapted to contain a syringe with a hollow injection needle, a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe, wherein the syringe is lockable for joint axial translation with the carrier.

Abstract: An auto-injector for administering a dose of a liquid medicament (M) is presented having an elongate case arranged to be held by a user, a tubular chassis telescoped in the case and biased against the case so as to protrude from the case. The injector also includes a syringe with a hollow injection needle, a drive spring and a plunger for forwarding load of the drive spring to a stopper of the syringe. A trigger button is distally arranged in or on the case, wherein the trigger button is initially coupled to the case in a manner to protrude distally from the case and interlocked to the chassis in a manner preventing the trigger button from disengaging the case.

Abstract: A device for administering a fluid includes a housing that holds a sterilization cassette having a shell, a fluid chamber, and a light transmitting window. An input directs fluid into the chamber. A light source is positioned to direct ultraviolet or other light through the window into the fluid chamber at an intensity sufficient to kill or render non-reproducible at least one species of a microorganism in the fluid while the fluid is in the chamber. An outlet receives fluid from the cassette and directs the fluid to a destination. The fluid is substantially uniformly exposed to the light while in the chamber. The cassette and light source are contained in a housing that prevents light from escaping the housing.

Abstract: An assembly for closing the discharge nozzle of a syringe which is pre-filled with a drug or medication. A syringe in combination with a connecting structure removably maintain and support the closure in an operative orientation, which facilitates the rotational attachment of the syringe and the closure when the closure is in mating engagement with the connecting structure. A subsequent removal of the syringe and connected closure from the container or other type of connecting structure is thereby facilitated. The need for an individual to directly handle or touch the closure during its attachment to the syringe is restricted or eliminated. The closure assembly preferably also includes a tamper evident structure which reduces the chances of tampering with the syringe in order to access its contents.

Abstract: The invention relates to a detent mechanism for controlling translation between two components in a longitudinal direction (P, D), the detent mechanism comprising at least one clip on one of the components arranged to be in a ramped engagement with a recess in the other one of the components in an initial state in such a manner that translation between the components is constrained and that application of a translative force between the components in one longitudinal direction (P, D) with the clip engaged with the recess deflects the clip out of the recess when a predetermined value of the translative force, at least depending on the resilience of the clip, is overcome so as to allow translation between the components.

Abstract: An extravasation detecting apparatus is provided which is capable of detecting at an early stage the dislodgment of a tip opening of a solution supplying tool from a blood vessel.

Abstract: An epidermal dressing includes a barrier film and a fitting that cooperates with a sensor emitting and detecting near infrared signals for monitoring an intravascular infusion. The barrier film overlies an epidermal insertion site for a cannula administering the intravascular infusion. The fitting includes a first arrangement that retains the sensor and a second arrangement that releases the sensor from the first arrangement.

Abstract: A modular external infusion device that controls the rate a fluid is infused into an individual's body, which includes a first module and a second module. More particularly, the first module may be a pumping module that delivers a fluid, such as a medication, to a patient while the second module may be a programming module that allows a user to select pump flow commands. The second module is removably attachable to the first module.

Abstract: The invention is directed to an analgesia and/or an anesthesia drug/device, system and an analgesic and/or an anaesthetic method utilizing a drug storage bag prefilled pharmaceutically or in a pharmaceutical compounding facility with a drug which system or method involves long-term stability of the thug prefilled storage bag, thus enabling the simplification of both, home treatment and hospital treatment procedures, in particular, the system or method is utilizing a storage bag comprising multi-layered flint. the surface of which is drug-compatible while subsequent layers constitute a barrier against any gases, e.g. oxygen, carbon dioxide, water vapour and/or humidity, and optionally ultraviolet radiation. This system and method comprises preferably a label/marking, providing information in a visual and/or wireless way to the pump system and the supporting services, directly or through the internet, in order to avoid medical errors regarding the administration of analgesic and/or anesthetics drugs.

Abstract: Included are embodiments of an ambulatory infusion device. Some embodiments include an energy storage for storing electrical energy utilized for powering the ambulatory infusion device. The energy storage may serve as a primary power source of the ambulatory infusion device. Also included is a dosing unit with an electrically powered actuator and an electronic controller, where the electronic controller controls operation of the electrically powered actuator. Some embodiments also include a testing unit for testing the energy storage. The testing unit may be configured to repeatedly carry out a test during operation of the ambulatory infusion device. Additionally, the test may include determining a control variable, the control variable being indicative of a capability of the energy storage for further powering the ambulatory infusion device.

Abstract: The present invention proposes another woven moisture sensor having at least one printed conductor for monitoring a patient's vascular access for blood loss to the surroundings, in particular for use in an extracorporeal blood treatment. The inventive moisture sensor has a monitoring section of the printed conductor which is produced by weaving, which is a high-resistance terminating resistor in a first embodiment and in a second embodiment is a tongue of the moisture sensor, which is provided and configured for cutting out the moisture sensor.

Abstract: A component for a drug delivery device comprises a key validation part and a safety part. The key validation part is configured to interact with a key part of another component of the drug delivery device during the assembly of the drug delivery device. In order to support the use of matching components, the safety part is configured to have a different impact if the key part is matched to the key validation part compared to if the key part is not matched to the key validation part.