摘要:
A medical device having a barrel, a retractable needle, a needle retraction assembly and a plunger, the needle retraction assembly including and being held inside the barrel prior to retraction at least in part by a retainer member contacting the barrel, the plunger comprising a plunger seal with an body having at least a portion that is rearwardly moveable relative to the plunger and an elastomeric web that seals a retraction cavity inside the plunger prior to retraction of the needle, the retainer member and the plunger seal each cooperating with an inside wall of the barrel to provide a sealed liquid containment chamber inside the device.
摘要:
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.
摘要:
Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.
摘要:
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.
摘要:
The invention relates to a syringe (20) comprising a syringe barrel (15), an ejector unit (25) arranged at the distal end of the syringe barrel (15) with a plunger rod (17), a coupling part (37) and a plunger (16) and a syringe head (21) arranged at the proximal end of the syringe barrel (15) with a needle unit (12) which is arranged in a guide sleeve (5) and is slidable therein with a cannula (3) and a cannula holder (4) and a pinion (2), by means of which the needle unit (12) is axially movable, relative to a syringe barrel (15) from a rest position to an actuation position. At the distal end of the guide sleeve (5) a sealing element (7) is arranged. The pinion (2) has at least one guide knob (1), which can be brought into engagement optionally with one of two slide tracks (10) provided in the guide sleeve (5), wherein the slide tracks (10) are inclined in opposite directions.
摘要:
A retractable syringe comprises a cutting head mounted on a plunger of the syringe. When the plunger is advanced to expel fluid from the syringe, the cutting crown cuts a retention mechanism which holds a needle unit of the syringe, allowing a drive mechanism to drive the needle unit into the syringe. The cutting crown is shaped to reduce the force which has to be applied to cut the retention mechanism. Furthermore, a disposable needle assembly for attachment to a syringe unit comprises a needle and connector element for connecting the needle to the syringe unit. The connector element encircles the needle and has a thread on its outer surface for mating with the syringe unit. When the needle assembly is mated with the syringe, a central bore of substantially constant bore extends from the tip of the needle into the interior chamber of the syringe.
摘要:
The invention relates to a syringe (20) comprising a syringe barrel (15), an ejector unit (25) arranged at the distal end of the syringe barrel (15) with a plunger rod (17), a coupling part (37) and a plunger (16) and a syringe head (21) arranged at the proximal end of the syringe barrel (15) with a needle unit (12) which is arranged in a guide sleeve (5) and is slidable therein with a cannula (3) and a cannula holder (4) and a pinion (2), by means of which the needle unit (12) is axially movable, relative to a syringe barrel (15) from a rest position to an actuation position. At the distal end of the guide sleeve (5) a sealing element (7) is arranged. The pinion (2) has at least one guide knob (1), which can be brought into engagement optionally with one of two slide tracks (10) provided in the guide sleeve (5), wherein the slide tracks (10) are inclined in opposite directions.
摘要:
A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.
摘要:
A retractable syringe comprises a cutting head mounted on a plunger of the syringe. When the plunger is advanced to expel fluid from the syringe, the cutting crown cuts a retention mechanism which holds a needle unit of the syringe, allowing a drive mechanism to drive the needle unit into the syringe. The cutting crown is shaped to reduce the force which has to be applied to cut the retention mechanism. Furthermore, a disposable needle assembly for attachment to a syringe unit comprises a needle and connector element for connecting the needle to the syringe unit. The connector element encircles the needle and has a thread on its outer surface for mating with the syringe unit. When the needle assembly is mated with the syringe, a central bore of substantially constant bore extends from the tip of the needle into the interior chamber of the syringe.
摘要:
A cutting element for a retracting needle syringe having a plunger with a cuttable distal end and a spring biased needle held by a cuttable support and a cutting element capable of cutting the cuttable distal end and the cuttable support includes a body portion having a proximal end, a distal end side wall therebetween and a passageway therethrough. The distal end of the body portion includes a cutting edge and a raised distally projecting tapered cutting tooth having distally converging edges. At least one tooth edge includes a sharp side wall for cutting the distal end of the plunger and the needle support.