Abstract: A tibial component of a knee prosthesis includes a tibial plate and a tibial insert, and anterior and posterior abutments projecting from an upper face of the tibial plate. The anterior abutment extends along at least part of the tibial plate and the posterior abutment extends for at least part of the tibial plate and comprises a part forming a promontory and an anterior cut-out, in particular central, in the form of a window formed in the anterior abutment opening onto the posterior face of the latter opposite the part forming the promontory. The tibial insert has a face upper, a face lower and a lateral face, which has a shape matching the part forming the promontory, characterised in that at least one flexible tab in the form of a hook projects centrally from an anterior face of the insert and locks by snap-fitting, into the anterior cut-out.

Abstract: This disclosure describes a surgical implant device comprising a body that includes a porous material forming at least a portion of the body, wherein the porous material is configured to promote bone ingrowth and is porous to a fluid. In addition, one or more fluid channels are formed in the body. The one or more fluid channels are arranged to define a fluidic path that exits into the porous material.

Abstract: Disclosed is a standalone anterior lumbar interbody spacer that includes a lumbar spacer body and lumbar plate with a unique locking system to rigidly couple the spacer body and plate via a spring loaded lock tab.

Abstract: A spinal plate selection and positioning system is provided for use in a spinal fusion procedure. The system may comprise an elongated guide member that is removably securable to an interbody cage by a holding rod. An interbody plate may be aligned and positioned above the interbody cage installed in a disc space. A drill guide may also be aligned and positioned above the interbody plate. The drill guide may be utilized to drill pilot holes in the vertebrae defining the disc space. Fasteners to secure the interbody plate may also by installed using the drill guide. The use of the guide member ensures that the interbody plate is properly aligned and positioned with respect to the interbody cage.

Abstract: An interbody fusion device includes a base member, a top member, and an expansion mechanism for moving the top member relative to the base member. The expansion mechanism may include a connector drive rod assembly, a gear, a threaded rod, and a support means. The gear ring is coupled to the threaded rod and is rotatable. The expansion mechanism may also include at least one load head coupled to the threaded rod. An alternative interbody fusion device is also disclosed and includes a bottom member, a superior member, and an expansion mechanism for moving the superior member relative to the base member, wherein the expansion mechanism comprises at least one expansion assembly for moving an end of the superior member relative to the bottom member.

Abstract: Surgical constructs, assemblies and methods of tissue fixation are disclosed. An anterior glenoid guide is a cuboid block configured to be introduced via the rotator interval to lie on the anterior glenoid. The guide has an internal thread for a handle and two flanges which lie on the anterior glenoid. On the anterior face (opposite the neck of the glenoid), the guide is provided with two holes which are sized to receive a drill guide. The holes mate with slots such that the block can be removed after sutures and fixation devices are installed. The anterior glenoid guide can be an arthroscopic anterior glenoid graft guide.

Abstract: A gap balancing assembly includes an alignment plateau adapted to abut against an articular surface of a first bone, and at least one gap spacer portion adapted to space the articular surface from a second bone, the at least one gap spacer portion having a thickness profile. A spacer member has a first contact surface for being abutted against said tibial alignment plateau, and a second contact surface oriented and spaced relative to the first contact surface to correspond to the thickness profile of the at least one gap spacer portion, the second contact surface adapted to contact a cut guide to align same with the articular surface of the first bone.

Abstract: Medical devices coupled to a sensor, and systems including such devices, can generate data and analysis based on that data, which may be used to identify and/or address problems associated with the implanted medical device, including incorrect placement of the device, unanticipated degradation of the device, and undesired movement of the device. Also provided are medical devices coupled to a sensor, and devices and methods to address problems that have been identified with an implanted medical device.

Abstract: Systems and methods are provided for planning placement of an acetabular implant for a patient based on pelvic tilt. The system includes one or more sensors to be placed on the patient to provide measurements of a pelvic tilt angle of the patient taken with the patient in various functional positions to produce patient-specific data based on pelvic tilt from which to plan an inclination angle and a version angle of the acetabular implant for the patient.

Abstract: The invention relates to a prosthetic foot comprising a base body having a main spring element, an upper spring element, a heel spring element, and a front spring element. The base body is formed in one piece.

Abstract: A method for controlling an artificial orthotic or prosthetic knee joint, on which a lower-leg component is arranged and with which a resistance device is associated, the bending resistance (R) of which resistance device is changed in dependence on sensor data that are determined by means of at least one sensor during the use of the orthotic or prosthetic knee joint, wherein a linear acceleration (aF) of the lower-leg component is determined, the determined linear acceleration (aF) is compared with at least one threshold value, and, if a threshold value of the linear acceleration (aF) of the lower-leg component is reached, the bending resistance (R) is changed.

Abstract: A prosthesis device having a tension element, fastened to a tensile force brace, which drives a movable component of a prosthesis device upon applying a tension force, wherein a sensor device is allocated to the tension element which detects the actuation of the tension element and activates a motor allocated to the movable component.

Abstract: A method of connecting an expansion ring to at least one end of a braided implant, the method including positioning the braided implant about a tube; everting an end portion of the braided implant over a first end of the tube; assembling an expansion ring to the braided implant, the expansion ring being a multi-leaved expansion ring comprising clips terminating with an open-ended coupling opening, wherein the openings are pushed over a set of intersecting wires of the braided implant at respective circumferential locations on or adjacent the first end of the tube; closing the openings over the set of intersecting wire; trimming ends of the braided implant; and reversing eversion of the braided implant thereby positioning the expansion ring internal to the braided implant.

Abstract: Disclosed herein is an assembly including a balloon catheter as an inner catheter for the delivery of a self-expanding stent. The delivery assembly may lack a separate pusher structure. A method of using a single assembly to delivery a self-expanding stent and provide a post-dilatation step is also described herein.

Abstract: An apparatus comprises a main arm having links extending from a ground end to an effector end and allowing movement of the effector end from a first position to a second position, the links including at least a base link adapted to be pivotally connected to a base, and a spacing link pivotally mounted to a free end of the base link and extending to the effector end. A first 4-bar parallelogram has pivot joints at its corners and including the base link of the main arm. A second 4-bar parallelogram has pivot joints at its corners and including the spacing link of the main arm and an effector link at the effector end adapted to support an object. A serial interconnection is between the first 4-bar parallelogram and the second 4-bar parallelogram constraining the effector link to maintaining a constant orientation in at least two rotational degrees of freedom relative to the base.

Abstract: An intestinal device, or a non-constrictive cuff, is configured for placement around an intestine. In the closed position the non-constrictive cuff is configured to be around at least part or all of an intestine, wherein the non-constrictive cuff does not constrict the portion of the intestine when deployed. A first intestinal device can be deployed for placement around a portion of an intestine, wherein a proximal end of the first intestinal device is configured to longitudinally overlap a distal end of a second intestinal device when disposed around an intestine. A method of use for a first intestinal device or non-constrictive cuff is also disclosed.

Abstract: An orthosis for the support of a joint, adapted to the thumb or wrist, comprising: sleeve-like main member made of an elastic material, adapted to envelop the joint and distal and proximal limb portions on either side of the joint, elastically deformable panel housed in a pocket formed in the main member, and non-elastic bracing device for bracing the main member and a proximal portion of the panel around the proximal limb portion, the panel being configured such that, over at least 50% of the length of the main member along the limb portions, including a limb portion covered by the bracing device, the panel has a cross-section occupying more than 30% of the perimeter of the underlying limb, the panel having a stiffness defined by a Young's modulus between 5 and 10 MPa, while the material forming the main member has a stiffness of a lower order of magnitude.

Abstract: It is the object of the invention to provide a knee bracing system that bolsters the body's natural ligaments to reduce the knees proneness to injury or re-injury. The invention is a cable system that acts much like the body's natural way that resists the forces that cause excessive joint movement and injury to the ACL and or MCL. As the leg travels through the range of motion the cables provide external hyper extension, bending, and rotation support preventing the tibia bone from moving forward (hyper extending) or twisting (lateral rotation) and or laterally bending with respect to the femur.

Abstract: An external ankle brace including a rigid heel enclosure having a rear portion and a forward portion, the rear portion configured to receive and at least partially encircle the heel portion of the shoe, the forward portion having a medial sidewall and a lateral sidewall for collectively and concurrently at least partially encircling the sides of the shoe concurrent with the rear portion connecting the medial and lateral sidewalls to collectively at least partially encircle the side. The ankle brace includes a lateral upright extension selectively perpendicular to the rigid heel enclosure and pivotally attached to the lateral sidewall, the lateral upright extension including a lateral reinforcing component and a medial upright extension selectively perpendicular to the rigid heel enclosure and pivotally attached to the medial sidewall, the medial upright extension including a medial reinforcing component.

Abstract: A dual-adjustable orthotic device to treat clubfoot and methods for using same. The device comprises a pair of paddles, adapted to attach footwear, attached at opposing ends of an adjustable torque bar the device has independent configuration systems to adjust the angle at which the paddles are oriented to the bar, and to adjust the torque loading applied to the paddles. These systems facilitate the independent adjustment of the device settings without changing the tensioning mechanism, stocking multiple devices, or having to disassemble and reassemble the tensioning structures.

Abstract: The invention relates to an ostomy pouch 10, 110. The pouch 10, 110 comprises an inner wall 18b, 118b and an outer wall 20b, 120b sealed about at least part of the periphery thereof to define a cavity for containing a stomal output. An inlet 22, 122 is provided into the cavity for receiving stomal output from an ostomate, in use. The cavity comprises multiple sections 12, 14, 16; 112, 114, 116 separated by waisted sections 13, 15; 113, 115. The maximum width of the sections 12, 14, 16; 112, 114, 116 has a greater width than a minimum width of the waisted section(s) 13, 15; 113, 115.

Abstract: The invention relates to an ostomy pouch 10. The pouch 10 includes an inner wall 18b and an outer wall 20b sealed about at least part of the periphery thereof to define a cavity for containing a stomal output. The cavity includes an upper section 12 and a lower section 14. A waisted section 13 is located between the upper section 12 and the lower section 14. A filter system is provided which includes a vent 30 in the outer wall of the pouch 10 for the release of gas from within the cavity to outside of the pouch 10; and a pre-filter arrangement comprising a protective panel 54 which defines a filter chamber 56 about the vent, and into which stomal output may enter, in use.

Abstract: An ostomy appliance comprising an inner wall and an outer wall that define a cavity for containing a stomal output, the ostomy appliance having an upper section, a lower section and a waisted section that is located between the upper section and the lower section. The upper section has a maximum width (A) that is greater than a maximum width (B) of the lower section and the waisted section has a minimum width (C) that is less than the maximum width (B) of the lower section. The waisted section has a left-hand edge that is smoothly rounded and a right-hand edge that is smoothly rounded, and both the left-hand edge and the right-hand edge smoothly blend, respectively, into left-hand edges and right-hand edges of the upper section and the lower section.

Abstract: A method of applying an ostomy appliance includes providing an adhesive wafer having an adhesive layer, a backing layer applied to a distal surface of the adhesive layer, and a release liner applied to a proximal surface of the adhesive layer, where the release liner forms an enclosure; introducing liquid into the enclosure and increasing a temperature of the adhesive layer with the liquid; removing the release liner from the ostomy appliance; and applying the adhesive wafer to the skin of the user.

Abstract: A base plate and/or a sensor assembly part for an ostomy appliance and related method is disclosed, the base plate and/or the sensor assembly part comprising: a first adhesive layer with a proximal side configured for attachment of the base plate and/or the sensor assembly part to the skin surface of a user, the first adhesive layer having a stomal opening with a center point; and a plurality of electrodes including a first leakage electrode, a second leakage electrode, and a third leakage electrode, wherein the plurality of electrodes is configured to detect presence of fluid on the proximal side of the first adhesive layer in a primary sensing zone and a secondary sensing zone, the primary sensing zone arranged in a primary angle space from the center point of the first adhesive layer and the secondary sensing zone arranged in a secondary angle space from the center point of the first adhesive layer.

Abstract: Disclosed is a base plate for an ostomy appliance and a method for manufacturing a base plate. The base plate comprising: a top layer; a first adhesive layer; an electrode assembly comprising a plurality of electrodes, the electrode assembly having a first part and a second part, the first part comprising connection parts of the plurality of electrodes, the second part being arranged between the first adhesive layer and the top layer; and a monitor interface configured for connecting the base plate to a monitor device, the monitor interface comprising a plurality of terminals configured to form electrical connections with respective terminals of the monitor device. The top layer comprises a top layer opening configured to allow for connection between the plurality of electrodes of the electrode assembly and terminals of the monitor device.

Abstract: An ostomy system configured to detect moisture content in a base plate or a sensor assembly part of the ostomy system, the ostomy system comprising the base plate and/or a sensor assembly part and a monitor device. The base plate or the sensor assembly part includes a first adhesive layer, a plurality of electrodes, and one or more sensing zones each covering one of one or more regions of the first adhesive layer, each of the one or more sensing zones including at least two of the plurality of electrodes. The monitor device is electrically coupled to the plurality of electrodes of the base plate or the sensor assembly part and configured to measure one or more resistances in the one or more sensing zones between the plurality of electrodes, each of the one or more resistances measured by two of the plurality of electrodes at one of the one or more sensing zones, and determine moisture content of the first adhesive layer at each of the one or more sensing zones based on the measured one or more resistances.

Abstract: An ostomy pouch includes a sheet of woven comfort material. The sheet of woven comfort material has an outside surface and an opposite inside surface. The outside surface of the sheet of woven comfort material forms at least part of the outside surface of the pouch, and at least part of the inside surface of the sheet of woven comfort material is coated with a web of hot-melt adhesive. A method of forming a sheet of comfort material for an ostomy pouch involves coating one side of a sheet of woven comfort material with a web of hot-melt adhesive to provide an inside surface comprising the coating. The web comprises a mass with a plurality of voids therein.

Abstract: A device for connecting and transferring contents between a surgically created first orifice and a surgically created second orifice is provided. The device comprises a hollow body member and first and second tubular legs depending from the hollow body, and being adapted for insertion into the first and second surgically created orifices respectively. The device further comprises a cap for closing the hollow body and completing a sealed pathway between the tubular legs for passively conveying contents between the first and second surgically created orifices. Sealing features of the device are provided that in combination operate to keep the contents away from unwanted skin areas and/or provide an easy-to-use device.

Abstract: The invention relates to an ostomy pouch 10. The pouch 10 includes inner and outer walls 18b, 20b of flexible sheet material which sealed about a periphery. The walls 18b, 20b define a cavity for containing a stomal output and a drain 32 for draining stomal output from the cavity. An opaque comfort layer 18a, 20a is provided, at over an outer surface of the inner and/or outer walls 18b, 20b. The drain 32 is moveable between a deployed position for draining the stomal output from the cavity and a stowed position for storage of the drain 32, with at least part of the drain 32 overlying a portion of the comfort layer 18a, 20a in the stowed position. The drain 32 is substantially opaque on one side, and at least partly transparent on an opposing side.

Abstract: An ostomy pouch, comprises: inner and outer walls of flexible sheet material defining a cavity for containing stomal output; a deployable drain for draining stomal output from the cavity; and at least one sheet of comfort material comprising a hot-melt adhesive coating. The first sheet of comfort material is attached to the outer wall and at least a portion of the first sheet of comfort material forms a flap. The flap is configured to cover the deployable drain when the drain is in a retracted position.

Abstract: Embodiments disclosed herein are directed to fluid collection assemblies that include at least one inflation device, methods for using the same, and systems including the same. An example fluid collection assembly includes a fluid impermeable barrier defining at least one opening, a chamber, and at least one fluid outlet. The fluid collection assembly also includes at least one porous material disposed in the chamber. The fluid collection assembly further includes at least one inflation device. The inflation device includes at least one bladder having one or more walls defining an interior region. The inflation device also includes at least one valve configured to selectively permit flow of at least one inflation fluid into and out of the interior region to switch the at least one bladder between a first state and a second state.

Abstract: A sleep apnea syndrome symptom improvement aid 1 includes a sandwiching target 10 sandwiched by front teeth of a patient, a tongue presser 20 extending from the sandwiching target 10 to the vicinity of the soft palate of the patient and including an elastic body configured to press the tongue, and a detector 30 configured to detect at least one of a vital sign or a salivary component of the patient.

Abstract: An instant cold therapeutic apparatus, comprising: at least one squeezable packet (1) associated with the apparatus, wherein the packet is gently squeezed by a user, a first burstable pouch (2) present inside the packet filled with first non-toxic reactant and a second burstable pouch (3) available inside the packet having a second non-toxic reactant, wherein the pouches present inside the packet include two non-toxic reactants, which react to produce cooling sensation at the infected portion of the user body.

Abstract: A temperature regulating socket apparatus for selectively heating or cooling a residual limb of an amputee is provided. The temperature regulating socket apparatus includes a socket having a brim, a distal end and a continuous side wall, all defining an open interior area for receiving the residual limb therein and a temperature regulating apparatus. The temperature regulating apparatus includes a thermal adjustment element embedded within the socket side wall; a temperature control unit operatively coupled to the thermal adjustment element; and a power supply operatively coupled to the temperature control unit. When the power supply is in its ON orientation the temperature control unit is powered so that the temperature control unit regulates the temperature of the thermal adjustment element to selectively heat or cool the residual limb within the socket.

Abstract: A device (1) for eye surgery includes a metallic ring (2) for suturing to the sclera of a patient's eye. A locking element (3) can be coupled to the metallic ring (2). The locking element (3) includes a lens (31) and a coupling ring (32) fixed to the lens (31) along the entire circumference of the inner edge of the lens (31). The coupling ring (32) is configured for coupling to the metallic ring (2).

Abstract: The disclosure provides a method for correcting higher-order aberrations including providing a laser radiation. The method also includes controlling a location of a beam focal point of the laser radiation by a system of scanners and guiding the beam focal point in such a way that the location of the beam focal point is in a cornea of an eye. The method further includes introducing the laser radiation into the cornea of the eye. The method includes cutting a lenslet, wherein a thickness of the lenslet t(X/Y) satisfies a following equation: t(X/Y)=t0+?t(X,Y)/(n?1), where ?t(X,Y) represents a higher-order wavefront elevation and to represents the thickness of the lenslet having a spherical refractive power of D.

Abstract: A welding helmet for detecting arc data is provided. One embodiment of the welding helmet includes an arc detection system configured to detect one or more welding arcs that occur during one or more welding operations. The welding helmet also includes control circuitry configured to count a number of the one or more welding arcs detected by the arc detection system. The welding helmet includes a storage device configured to store the number of the one or more welding arcs.

Abstract: The present disclosure is directed to systems and methods that removing exogenous particles from a target region of the skin of a patient. The systems and methods can employ dermal lavage to remove the exogenous particles from the target region. In some instances, the exogenous particles can be residual tattoo ink after a tattoo removal process. A conduit can be sized and dimensioned for insertion into or around the target region to inject an irrigation fluid that defines an irrigation area. The exogenous particles can be suspended in the irrigation fluid. A device can be configured to form one or more channels in the irrigation area so that the exogenous particles are removable from the irrigation area.

Abstract: The present disclosure provides a medical negative pressure lamination component including an airtight patch, a dressing patch, a battery module, a slim-type pump and a sensing and controlling module. The airtight patch includes a communication portion and a dressing area in fluid communication with each other. The dressing patch is accommodated in the dressing area. The slim-type pump is electrically connected to the battery module. The sensing and controlling module is electrically connected to the battery module and the slim-type pump, and detects and controls a gas pressure and a gas flow provided by the slim-type pump. The dressing patch is attached on the skin surface, and is covered and accommodated by the airtight patch. When the slim-type pump is actuated, the air between the airtight patch and the skin surface is drawn out by the slim-type pump through the communication portion, and a negative pressure is formed therebetween.

Abstract: A breathable adhesive bandage, sticking plaster or plaster includes a fabric layer, a pad and an adhesive. The adhesive may provide only partial coverage of the fabric layer, allowing breathability. The pad and/or fabric layer may be formed from wool, such as merino wool. A backing may be applied to the adhesive layer.

Abstract: An absorbent article includes bond seams that are positioned forwardly towards the article central longitudinal direction from the lateral-most side edges of the article, and which are aligned with the highest point of high-rise leg openings on the article. The absorbent article is conformable on both front and back panels, with the front panel being narrower in dimension than the back panel. The bond seams and leg openings can be seen on the front surface of the relaxed and flattened absorbent article. Such absorbent article may be manufactured along the article transverse direction by use of differential tension during manufacture, or differential retractive properties of elastic base materials.

Abstract: This invention is an absorbent article and more particularly to an improved absorbent device that is worn in body clefts, in particular interlabially by female wearers for catamenial purposes, incontinence protection, or both and in the anal crease for light faecal incontinence or in the context of haemorrhoids, or underarm sweat-pads.

Abstract: An absorbent article for wearing about the lower torso of a wearer includes a first waist region having a first waist edge, a second waist region having a second waist edge, and a crotch region disposed between the first and second waist regions. The article further includes a first longitudinal edge, a second longitudinal edge, and a chassis comprising a topsheet, a backsheet, and an absorbent core disposed between the topsheet and backsheet. A waist gasketing element is disposed in one of the first or the second waist regions and joined to the chassis in a chassis attachment region. The waist gasketing element comprises an outboard lateral edge and an inboard lateral edge. The chassis attachment region comprises a first zone proximate to the outboard lateral edge and a second zone disposed longitudinally inboard of the first zone. Each of the first and the second zones comprise one or more chassis attachment bonds.

Abstract: A nonwoven web for use in an absorbent article is described. The nonwoven web has first and second nonwoven layers. The first nonwoven layer has a first plurality of fibers, an additive disposed, at least in part, on a portion of the first plurality of fibers, a first side and an opposing second side, wherein second side has a plurality of discontinuities. The second nonwoven layer has a second plurality of fibers, a first surface and an opposing second surface, and a plurality of tufts extending through at least a portion of the discontinuities in the first nonwoven layer, wherein the second nonwoven layer is attached to the first nonwoven layer such that at least a portion of the second plurality of fibers are in liquid communication with the first nonwoven layer, wherein the first nonwoven layer is hydrophobic and the second nonwoven layer is hydrophilic.

Abstract: The present disclosure relates to an absorbent article comprising a wearer-facing surface and an opposite garment-facing surface. The absorbent article comprises a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core disposed between the topsheet and the backsheet. The topsheet comprises a nonwoven substrate comprising cellulose-based fibers, a first surface and an opposite second surface. The first surface of the nonwoven substrate forms at least part of the wearer-facing surface. The first surface comprises a first area having a first contact angle no less than about 100°, as measured by Contact Angle Test, and the second surface comprises a second area having a second contact angle no less than about 82°, as measured by Contact Angle Test. The second contact angle is smaller than the first contact angle.

Abstract: An array includes at least one first disposable pant article and at least one second disposable pant article. The first article has a first structure, and at least the outside surface and a surrounding zone of the absorbent core have substantially the same first colour. The second article has a second structure, and at least the outside surface and a surrounding zone of the absorbent core have substantially the same second colour. Each of the first and second articles includes an information tag arranged on the inside of the waist portion, the material of the information tag being in a third colour which is different from the first and second colours by a colour difference ?E*ab more than 20. The first structure is structurally different from the second structure and/or the first colour is different from the second colour by a colour difference ?E*ab more than 10.

Abstract: An absorbent article comprises a topsheet, backsheet, and absorbent core positioned intermediate the topsheet and the backsheet, and an outer cover nonwoven material. The outer cover nonwoven material comprises a first surface, a second surface, and a visually discernible pattern of three-dimensional features on the first surface and/or the second surface. At least some of the three-dimensional features each comprise a first region and a second region. The first regions have a first value of an average intensive property. The second regions have a second, different value of the average intensive property. A garment-facing side of the backsheet comprises one or more visually vibrant graphics. A portion of the visually discernible pattern of three-dimensional features overlaps a portion of the one or more visually vibrant graphics. The portion of the one or more visually vibrant graphics exhibits a chroma value greater than 8.

Abstract: An absorbent article having a topsheet, a backsheet, an absorbent core, and an outer cover material or a landing zone having an embossed pattern is provided. A garment-facing surface of the backsheet has one or more graphics. A portion of the embossed pattern overlaps a portion of the graphics. The portion of the graphics exhibits a first L*, a*, b* color value, when measured through a densified region of the embossed pattern. The portion of the one or more graphics exhibits a second, different L*, a*, b* color value, when measured through a non-densified region of the outer cover material. The garment-facing surface of the backsheet has a graphic-free area of about 5% to about 85%. The embossed pattern forms at least one and less than 40 recognizable, discrete indicia.

Abstract: In a mobile stretcher, in order to change the height position of a patient support mounted on a chassis, the chassis geometry is modifiable by a hydraulic drive system. The drive system includes a linear actuator, a pressure supply unit, and a receiving space for hydraulic fluid. A manually actuatable unlocking valve unit directly connects a lifting working chamber of the linear actuator to the receiving space. The valve unit has a control space delimited by a piston element movably guided relative to the housing of the valve unit and which communicates with a lifting attachment, which communicates with the working chamber. The piston element is operatively connected to a valve body interacting with a valve seat of a relief valve between the lifting attachment and a tank attachment communicating with the receiving space. A mechanical actuation input acts on the valve body, with a spring element interposed.