Abstract: A cannula retractable medical collection device includes a cannula mount inserted into and axially slidable relative to a rear larger-diameter wall portion of a barrel, a double-ended needle cannula including a rear needle segment extending into an accommodation chamber in the cannula mount for pricking a stopper of a collection vial, and a front needle segment secured to the cannula mount by a needle hub. The front needle segment extends outwardly of the barrel in a position of use, and retreats inwardly and rearwardly of the barrel in a disposal position when the cannula mount is in the front and rear positions, respectively. A releasably retaining member includes a retaining hole formed in the larger-diameter wall portion, and a radially extending engaging peg engageable in the hole. An actuator is operable to disengage the peg from the hole so as to permit axial movement of the cannula mount.

Abstract: A respiratory mask includes a shield and a mask body. The shield includes an air-impermeable bent sheet that defines a rim-receiving recess. The mask body is detachably connected to the shield and includes a rim that is received in the rim-receiving recess and that defines a chamber therein. The shield cooperates with the mask body to define a gap therebetween. The rim is formed with at least an aperture that is in spatial communication with the chamber and the gap. A filter sheet is permeable to air and is attached to the rim to cover the aperture.

Abstract: A disposable syringe has a needle seat with an upper segment adapted to be fitted with a needle cannula, and a lower segment retained in a passage of a barrel. A plunger has a stem portion movable in the passage, a deformable surrounding engaging portion in sealing contact with the passage so as to be moved by the stem portion to a position of use, and a surrounding abutting head which is moved towards and which is held by a grip segment in the needle seat when the surrounding engaging portion is depressed by an edge portion of the needle seat by virtue of a continuing depression force of the plunger, thereby permitting the needle seat to be brought into the passage for disposal.

Abstract: A disposable syringe includes a needle assembly having a needle seat retained in a barrel by a grip member to fix a needle cannula, a tubular plunger movable in the barrel toward the needle seat during an injection course, and a coupling member having a retained shank in frictional engagement with the plunger, and an anchored portion disposed outwardly of the plunger to engage a rear anchoring portion of the needle seat when the coupling member is moved forwardly. When the plunger is moved further forward to cause the plunger to move relative to the coupling member, the retained shank is released to enable the needle assembly to retract into the plunger by means of a biasing member. A guiding sleeve is sleeved on the needle seat, and can be forced to extend between the needle seat and the grip member so as to decrease the frictional force therebetween for ensuring successful retraction of the needle assembly.

Abstract: A disposable syringe has a needle seat with an upper segment adapted to be sleeved over by a needle unit, and a lower segment retained in a passage of a barrel. A plunger has a stem portion movable in the passage, a surrounding engaging portion in sealing contact with the passage so as to be moved by the stem portion of the plunger in a position of use, and a head which is moved towards and is held by a grip segment in the needle seat when the surrounding engaging portion is depressed by an edge portion of the needle seat by virtue of a continuing depression force of the plunger, thereby permitting the needle seat to be brought into the passage for safe disposal.

Abstract: An intravenous catheter introducing device includes a needle hub inserted into and axially slidable relative to an inner barrel wall surface of a barrel. The needle hub holds a needle cannula and permits the cannula to extend forwardly of the barrel for ready use. A catheter connection assembly is detachably sleeved on a front smaller-diameter wall portion of the barrel and permits a tip end of the needle cannula to project forwardly of a tubular cannula of the assembly. A releasably retaining member includes a retaining hole formed in a rear larger-diameter wall portion of the barrel, and a radially extending engaging peg engageable in the hole. Operation of an actuator mounted on the peg can disengage the peg from the hole so as to permit axial movement of the needle hub for drawing the needle cannula within the barrel.

Abstract: A disposable syringe includes a barrel having a retaining region to retain a needle seat for carrying a needle cannula, and a friction diminishing region extending forwardly from the retaining region and terminating at a shoulder abutment, a plunger movable in the barrel toward the needle seat, and a coupling member biased by a biasing member and having a retained portion to frictionally engage the plunger, and an anchored portion to engage an anchoring portion of the needle seat such that when the needle seat is moved past the friction diminishing region to abut against the shoulder abutment, a subsequent pushing force applied to the plunger results in release of the retained portion from the plunger, thereby enabling the anchored portion to be moved into the plunger by means of the biasing member.

Abstract: A disposable syringe includes a tubular needle seat inserted into a barrel for fixing a needle cannula. The needle seat has an axially extending cavity with a radially yieldable catch disposed therein. A plunger is movable in the barrel, and has an engaging head defining a rearwardly facing shoulder wall which is retained by the catch when the engaging head is extended into the cavity by a pushing force applied to the plunger. The barrel defines friction diminishing regions such that when the needle seat is moved past the friction diminishing regions to be placed to a disposal position, friction between the needle seat and the barrel is diminished, thereby facilitating a subsequent pulling action of the plunger for retracting the needle cannula into the barrel.

Abstract: A single-use syringe includes a barrel having front and rear passageways and a shoulder disposed there between, a plunger movable in the rear passageway, a carrier having a tail portion extending from a front end wall of the plunger, and pushing and retained regions formed forwardly of the tail portion, and a deformable sealing member in fluid-tight and slidable engagement with the barrel. The sealing member includes an inner surrounding wall surface with a yielding segment engaging the pushing region, and a retaining segment in frictional engagement with the retained region by a frictional force so as to confine a fluid-tight surrounding area. The frictional force is diminished when the yielding segment is depressed by the pushing region so as to facilitate release of the retained region from the retaining segment, thereby disrupting the fluid-tightness of the surrounding area and rendering the syringe unreusable.

Abstract: An intravenous catheter inserting device includes a catheter hub engaging an open forward end of a barrel and having a duct that communicates with a passage of the barrel. A tubular catheter is disposed to communicate with the duct, and permits a needle cannula to pass therethrough. A plunger is received in the passage and extends rearwardly of the barrel so as to be manually operable. The plunger has a cavity containing fluid at a reduced pressure, and is coupled with the needle cannula within the passage such that the needle cannula can be retracted into the cavity due to a pressure difference between the ambient air and the reduced pressure.

Abstract: An intravenous catheter introducing device includes a needle hub inserted into and axially slidable relative to an inner barrel wall surface of a barrel. The needle hub holds a needle cannula and permits the cannula to extend forwardly of the barrel for ready use. A catheter connection assembly is detachably sleeved on a front smaller-diameter wall portion of the barrel and permits a tip end of the needle cannula to project forwardly of a tubular cannula of the assembly. A releasably retaining member includes a retaining hole formed in a rear larger-diameter wall portion of the barrel, and a radially extending engaging peg engageable in the hole. Operation of an actuator mounted on the peg can disengage the peg from the hole so as to permit axial movement of the needle hub for drawing the needle cannula within the barrel.

Abstract: A cannula retractable medical collection device includes a cannula mount inserted into and axially slidable relative to a rear larger-diameter wall portion of a barrel, a double-ended needle cannula including a rear needle segment extending into an accommodation chamber in the cannula mount for pricking a stopper of a collection vial, and a front needle segment secured to the cannula mount by a needle hub. The front needle segment extends outwardly of the barrel in a position of use, and retreats inwardly and rearwardly of the barrel in a disposal position when the cannula mount is in the front and rear positions, respectively. A releasably retaining member includes a retaining hole formed in the larger-diameter wall portion, and a radially extending engaging peg engageable in the hole. An actuator is operable to disengage the peg from the hole so as to permit axial movement of the cannula mount.

Abstract: A respiratory mask includes a shield and a mask body. The shield includes an air-impermeable bent sheet that defines a rim-receiving recess. The mask body is detachably connected to the shield and includes a rim that is received in the rim-receiving recess and that defines a chamber therein. The shield cooperates with the mask body to define a gap therebetween. The rim is formed with at least an aperture that is in spatial communication with the chamber and the gap. A filter sheet is permeable to air and is attached to the rim to cover the aperture.

Abstract: A disposable syringe includes a plunger movable in a barrel relative to a needle seat that engages an inner surrounding barrel wall surface of the barrel by a resisting force. The plunger includes a plunger body and a coupling rod which is in frictional engagement with the plunger body and which has a central anchored area disposed to engage an anchoring portion of the needle seat by a holding force. As such, when the plunger body is moved to bring the central anchored area into engagement with the anchoring portion, the resisting force is overcome to permit disengagement of the needle seat from the barrel, and the coupling rod and the needle seat can be retracted into the plunger body by virtue of a biasing action of a biasing member.

Abstract: A disposable syringe includes an encasing member which is sleevable on a syringe body from a needle hub of the syringe body. A needle cannula is secured to the needle hub and projects outwardly of a surrounding front segment of the encasing member in a position of use. A plunger is slidably disposed in a barrel wall of the syringe body in a longitudinal direction. The syringe body is movable relative to the encasing member in the longitudinal direction between the position of use, where the needle hub is disposed in the surrounding front segment, and a disposal position, where the needle cannula is disposed inwardly of the surrounding front segment as a result of withdrawal of the needle hub from the surrounding front segment.

Abstract: An intravenous catheter inserting device includes a catheter hub engaging an open forward end of a barrel and having a duct that communicates with a passage of the barrel. A tubular catheter is disposed to communicate with the duct, and permits a needle cannula to pass therethrough. A plunger is received in the passage and extends rearwardly of the barrel so as to be manually operable. The plunger has a cavity containing fluid at a reduced pressure, and is coupled with the needle cannula within the passage such that the needle cannula can be retracted into the cavity due to a pressure difference between the ambient air and the reduced pressure.

Abstract: A disposable syringe includes a tubular barrier member retained in a rear passageway of a barrel. A tubular needle seat for fixing a needle cannula is retained on the barrier member, and abuts against an abutment wall in the front passageway of the barrel while the needle cannula is disposed outwardly of the barrel. A plunger is slidable in the rear passageway, and has a seal member to seal a cavity confined in a plunger body and containing a fluid at a reduced pressure. When a pushing force applied to the plunger body moves the barrier member against the first and second frictional forces, the needle seat is released, and the seal member is ruptured, so that the needle seat and the needle cannula are suctioned into the cavity due to the pressure difference between the ambient atmosphere and the reduced pressure.

Abstract: A disposable syringe includes a tubular barrier member retained in a rear passageway of a barrel. A tubular needle seat for fixing a needle cannula is retained on the barrier member, and abuts against an abutment wall in the front passageway of the barrel while the needle cannula is disposed outwardly of the barrel. A plunger is slidable in the rear passageway, and has a seal member to seal a cavity confined in a plunger body and containing a fluid at a reduced pressure. When a pushing force applied to the plunger body moves the barrier member against the first and second frictional forces, the needle seat is released, and the seal member is ruptured, so that the needle seat and the needle cannula are suctioned into the cavity due to the pressure difference between the ambient atmosphere and the reduced pressure.

Abstract: A vaginal suppository delivery device includes a pincer body having upper and lower clamp members that cooperate to confine a passage, a sleeve member, and a push rod. The clamp members have connecting and clamp end sections. The sleeve member is movable toward the connecting and clamp end sections of the clamp members so as to permit the clamp end sections to move away from and toward each other, thereby permitting a suppository to be disposed and clamped in a drug receiving groove in the passage. The push rod has an operating end that is operable so as to enable a drug pushing end to push the suppository to move out of the passage after the pincer body has been inserted into a vaginal cavity, thereby delivering the suppository into the vaginal cavity.

Abstract: A disposable syringe has a needle seat with an upper segment adapted to be sleeved over by a needle unit, and a lower segment retained in a passage of a barrel. A plunger has a stem portion movable in the passage, a surrounding engaging portion in sealing contact with the passage so as to be moved by the stem portion of the plunger in a position of use, and a head which is moved towards and is held by a grip segment in the needle seat when the surrounding engaging portion is depressed by an edge portion of the needle seat by virtue of a continuing depression force of the plunger, thereby permitting the needle seat to be brought into the passage for safe disposal.