A method of administering subcutaneous treatment to a patient is provided. The method includes delivering, by a needle-free injection device, a first volume of a treatment at a first location on a surface of a body of the patient; detecting a movement of the needle-free injection device relative to the first location; determining, from the movement of the needle-free injection device relative to the first location, a second location of the needle-free injection device relative to the first location; determining a second volume of the treatment to deliver at the surface of the body of the patient at the second location; and delivering, by the needle-free injection device, the second volume of the treatment at the second location on the surface of the body of the patient.

A medicament delivery device is presented having a housing with an inner surface structure, a delivery member cover slidably arranged in the housing, a medicament container housing arranged in the housing, a rotator configured to cooperate with the inner surface structure, the rotator being in axial engagement with the medicament container housing, wherein the delivery member cover is configured to be moved axially from an extended position relative to the housing to a retracted position, thereby causing the rotator to rotate from a first rotator position to a second rotator position, a forward-biased plunger rod extending through the rotator and having a first axial engagement position with the rotator when the rotator is in the first rotator position and in the second rotator position, wherein the rotator has an engagement structure configured to engage with the inner surface structure when the rotator is in the first rotator position to prevent forward movement of the rotator, and wherein the rotator is configured to disengage from the inner surface structure when the rotator is rotated from the first rotator position towards the second rotator position, causing the rotator, the plunger rod and the medicament container housing to move forward an auto-penetration distance in the housing.

A medicament delivery device is presented having a housing with an inner surface structure, a delivery member cover slidably arranged in the housing, a medicament container housing arranged in the housing, a rotator configured to cooperate with the inner surface structure, the rotator being in axial engagement with the medicament container housing, wherein the delivery member cover is configured to be moved axially from an extended position relative to the housing to a retracted position, thereby causing the rotator to rotate from a first rotator position to a second rotator position, a forward-biased plunger rod extending through the rotator and having a first axial engagement position with the rotator when the rotator is in the first rotator position and in the second rotator position, wherein the rotator has an engagement structure configured to engage with the inner surface structure when the rotator is in the first rotator position to prevent forward movement of the rotator, and wherein the rotator is configured to disengage from the inner surface structure when the rotator is rotated from the first rotator position towards the second rotator position, causing the rotator, the plunger rod and the medicament container housing to move forward an auto-penetration distance in the housing.

A needle adaptor for forming an injection device for administering a fluid to a subject is disclosed. An assembly for forming an injection device for administering a fluid to a subject comprising a needle adaptor body is also disclosed. Methods for assembling the needle adaptor and the assembly are further disclosed, as are methods of administering a fluid to a subject using same, and kits and injection devices comprising same.

A cover assembly that covers a medicament delivery member of a medicament container. The assembly having a housing extending along a longitudinal axis, a proximal end and a distal end. A cover member bi-directionally movable along the longitudinal axis relative to the housing, where the cover member has a tubular portion arranged to protrude from the proximal end of the housing, a biasing element arranged between the housing and the cover member configured to move the cover member, a locking member having a fixed end which is pivotally arranged to the housing and a free end which is releasably connected to the cover member. The cover assembly also has an actuator unit connected to the housing configured to interact with the free end of the locking member such that the locking member is able to lock and unlock the cover member in different positions.

A device for performing a transversus abdominis plane (TAP) block anesthetic injection during a laparoscopic surgical procedure. The device includes a handle, a needle fixed to the handle, and a sheath covering the needle. The sheath is slidably retractable via a thumb-operated slider on the handle. In a first position for device insertion, the sheath fully covers the tip of the needle, preventing the needle from puncturing any organ or tissue in the patient. In a second position, the sheath is retracted using the slider to expose the needle tip, enabling insertion of the needle tip into the appropriate tissue and injection of the anesthetic. The needle and sheath have a length suitable for reaching the desired abdominal location from outside the body through the laparoscopic port. A threaded luer and tube, fluidly coupled to the needle, are used to push the anesthetic through the needle and into the tissue.

An intraosseous needle assembly includes a needle having a first cylindrical shaft. The shaft having a distal end, a proximal end, and a wall defining an inner channel. The first cylindrical shaft includes threading protruding from the wall along a proximal portion of the first cylindrical shaft. The needle further includes a needle head extending from the proximal end of the first cylindrical shaft. The needle assembly may further include a stylet, the stylet having a second cylindrical shaft having a first end and a second end and a stylet head extending from the second end. The stylet head includes a proximal surface and a distal surface, a pair of substantially parallel second side walls, a pair of rounded end sections joining the second side walls, a protrusion extending from the distal surface, and a tapered section extending from the distal surface to the second cylindrical shaft.

An injection system comprising a syringe barrel; a first sealing element and a second sealing element moveably disposed in the syringe barrel; an injection chamber between them; a puncture element extending from the first sealing element to deliver an injection agent from the injection chamber into a biological space, wherein one or more of the syringe barrel, the first or the second sealing element are configured to prevent proximal movement of the first sealing element past a pre-selected location, while allowing the second sealing element to come in contact with the first sealing element, the system is configured such that, when a force is applied on the second sealing element in a distal direction, in response to a first opposing force, the puncture element advances and in response to a second opposing force, the puncture element remains stationary and the injection agent is conveyed through the puncture element.

An injection system comprising a syringe barrel; a first sealing element and a second sealing element moveably disposed in the syringe barrel; an injection chamber between them; a puncture element extending from the first sealing element to deliver an injection agent from the injection chamber into a biological space, wherein one or more of the syringe barrel, the first or the second sealing element are configured to prevent proximal movement of the first sealing element past a pre-selected location, while allowing the second sealing element to come in contact with the first sealing element, the system is configured such that, when a force is applied on the second sealing element in a distal direction, in response to a first opposing force, the puncture element advances and in response to a second opposing force, the puncture element remains stationary and the injection agent is conveyed through the puncture element.

A needle hub (10) for a pen needle is provided with an enlarged surface for contact with the skin of a patient. The enlarged surface is provided with a surface having a dimension and shape to enable a needle or cannula to penetrate the skin to a desired depth and permit substantially the entire exposed length of the needle or cannula to penetrate the skin to the desired depth. The surface of the needle hub can be formed by an inner cone shaped member (26) forming a first contact surface with a surface area of about 1-5 mm.sup.2 and an outer ring (28) at a peripheral edge forming a second contact surface with a combined surface area of about 15 to 50 mm.sup.2.