Abstract: A roller clamp includes at least two opposing and spaced apart side walls, a guide wall, a further wall opposite the guide wall defining an aperture therethrough, a hollow body and a roller. The hollow body has a body aperture therethrough. The roller comprises a roller wheel having two axial projections protruding from a center of each side of the roller. Each side wall is provided with an opposing guide groove on the interior surface thereof. The two axial projections of the roller wheel are slidingly seated in the guide grooves so that the roller can move in the aperture of the further wall as the projections slide in the grooves. At least one respective long edge of each corresponding guide groove is provided with at least one notch. The resulting at least one pair of corresponding notches can at least partially seat the two projections.

Abstract: A disposable assembly for use with a sensor assembly comprises a body, a flow restricting element, and a fluid pressure membrane. The body has a lid portion and a base portion. The body defines a fluid flow passage that forms an inlet and an outlet. The flow restricting element is positioned in the fluid flow passage between the inlet and the outlet. The membrane is located between the lid and base portions along the fluid flow passage. A reinforcing structure, such as a ring or a rigid disk, is positioned between the fluid pressure membrane and the lid portion to provide increased resistance to pressure in the fluid flow passage. The ring or disk can be a separate component or formed on the membrane. The membrane thickness adjacent to sensor access openings in the lid portion can be increased for pressure resistance, too.

Abstract: An article prevents a drainage tube or catheter from being inadvertently moved, removed, or constricted. The article generally includes (i) a hollow conduit having a medial bend formed with an angle of between 45 and 135 degrees, and further having a lateral opening in a wall of the conduit, the opening exposing an interior space within the conduit, the wall having a means for securing a retainer in a selected position relative to the opening, (ii) a catheter positioned coaxially within the conduit, the catheter having a catheter wall, and (iii) the retainer removably secured within the opening wherein a tooth of the retainer penetratingly positioned within the catheter wall.

Abstract: A slide clamp for use with an infusion pump and infusion set provides finger grips and support members for supporting the infusion tubing. The finger grips make the slide clamp easier to use while reducing the risk of error. The tubing support members reduce the likelihood of improperly loading the tubing and reduce the risk of kinking the tubing during use. An infusion set is provided wherein the slide clamp may be coded through the use of colors, holes, or the like so as to identify the type of infusion tubing used therewith. The infusion pump can identify the code on the slide clamp and thereby determine the type of infusion tubing, and thereby allow access only to infusion programs for drugs or infusion solutions which are compatible with the particular type of infusion tubing.

Abstract: A metered enteral feeding system for delivering fluids, the metered enteral feeding system including a vented container with contained volume for containing the fluids. The metered enteral feeding system includes a discharge port for discharging the fluid from the contained volume and at least one vent for allowing airflow into the contained volume. The metered enteral feeding system also includes a flow control valve in fluid communication with the discharge port of the vented container. The fluid control valve is adjustable to provide an increased or decreased flowrate therethrough.

Abstract: Transfer sets are disclosed in the present patent. The transfer set provides a connection between a source of peritoneal dialysis fluid and a patient for whom peritoneal dialysis has been prescribed. The transfer sets disclosed herein are smaller and provide a more compact and convenient device by which a dialysis patient controls the flow of dialysis fluid to and from the peritoneum of the patient. The devices are more compact and convenient because they include more convenient mechanisms for starting and stopping flow of the dialysis fluid. It is also easy to determine whether the mechanism is in a closed or open configuration by simply looking at the mechanism.

Abstract: A device including: a tubing clamp having a clamping mechanism holding closed a first fluid line while a second fluid flows along a second fluid line from a second container, the first fluid line delivers a flow of a first fluid; and a vacuum activated catch retainably coupled with the tubing clamp and coupled with the second fluid line, the vacuum activated catch including: a movable element coupled with the tubing clamp and configured for changing from a first shape to a second shape upon receipt of a deforming pressure, wherein when the movable element is in the first shape, the vacuum activated catch retains the tubing clamp in a closed position, and when the movable element is in the second shape, the vacuum activated catch releases the tubing clamp into an open position, thereby allowing the flow of the first fluid to commence within the first fluid line.

Abstract: A device for controlling the rate of flow of a liquid in a flexible tube comprising two opposed surfaces between which the tube is received in use wherein the surfaces are elongated in the direction of flow of the liquid in the tube and are either parallel to one another or arranged so that in use the included angle does not exceed 40°, and means for varying the distance between the surfaces so as to compress the tube between them by the desired amount.

Abstract: Occlusion assemblies facilitating occlusion of flexible tubing are disclosed. Occlusion assemblies may be associated with or form part of a medical infusion device and may facilitate fluid handling by such devices. Occlusion assemblies may position and immobilize tubing. Occlusion assemblies comprise a tubing occluder constructed and positioned to apply a force to tube(s) to occlude the tubes. Occlusion assemblies may be configured to include a single tube in certain cases, and in other cases to occlude multiple tubes, whether an odd number of tubes or an even number of tubes. Occlusion assemblies may include automatic actuators and in certain cases also include a manual actuator to provide an override function. Occlusion assemblies may include safety features, for example, to prevent a release of occlusion force on the tubing and/or convenience features, for example a retainer mechanism to hold the tube occluder in a non-occluding position.

Abstract: A dual pump irrigation/aspiration pump system capable of operating in a plurality of different modes suitable for a variety of different endoscopic surgical procedures. The system monitors actual or calculated intra-articular pressure and adjusts flow to maintain surgeon requested pressure at the surgical site while controlling outflow. The irrigation/aspiration pump system has an inflow pump and tubing dedicated to communicating fluid to the surgical work site and an outflow pump and tubing dedicated to removing fluid from the work site at a controlled rate. The system further has different size inflow and outflow pumps and tubing cassettes, means for altering the outflow fluid flow rate to accommodate a surgical tool and a means for declogging the surgical tool in the event of blockage. In a preferred embodiment a pressure control system provides inferred pressure information representative of the pressure at the work site.

Abstract: A medical tube clamp wherein first and second plate parts including, on opposing surfaces, compressive protrusions for closing a medical tube are provided with a pair of side walls on both sides projecting from one toward an other of the plate parts, and are also provided with a central guide protrusion projecting from the other toward the one of the plate parts. Both sides of a tip portion of the central guide protrusion make sloping guide surfaces projecting toward a center. When the plate parts are displaced relative to each other so as to become closer, lateral displacement of them is corrected by a slide of the pair of side walls and the sloping guide surfaces, and the central guide protrusion is inserted between the pair of side walls.

Abstract: Provided are devices and methods for reducing or preventing fluid flow through a catheter lumen. For example, the devices and methods can be used to reduce blood flow through a catheter. Optionally, the catheter is an intravenous catheter. Also provided are catheters.

Abstract: An anti-free-flow mechanism includes an occluder mechanism which is disposed along a segment of tubing. The occluder mechanism is normally in a biased closed position, but may be moved into an open position by moving an engagement member into engagement with the tubing segment to deform the tubing segment and open a flow channel. Unless force is applied to keep the engagement member in contact with the tubing segment, the tubing will return to the first, closed position.

Abstract: A regulating device for an intravenous drip set comprising a main housing unit (1) which comprises a mobile roller (2) which can gradually compress a flexible tubing (4) until the tubing (4) is fully compressed and a fixed roller (3) which together with the mobile roller (2) squeeze the flexible tubing of an intravenous line into a totally closed position to act as a flusher for the intravenous line, whereby when by sliding the entire device downwards along the tubing (4) proximally towards a patient, flushing of fluid in the intravenous line is thereby achieved.

Abstract: Inline valve assembly having a body with an axial bore and guide slots extending in a direction perpendicular to the bore, a flexible tubular liner having an axially extending flow passageway with a generally cylindrical side wall disposed in and supported by the bore, throttling pins mounted in the guide slots in engagement with the side wall on opposite sides of the liner, and cam members rotatively mounted on the valve body for urging the pins together against the side wall to restrict flow through the passageway.

Abstract: A pinch clamp assembly for engaging a tube (10) with an enteral feeding or infusion pump adapted to feed nutritionals or to infuse medical solutions to a patient, is provided comprising a base (1) comprising holding means (3) for holding a tube (10) in operative engagement with the base (1), a first clamping surface (4) and supporting means (5) for supporting a connector (6), a clamping element (7) having a second clamping surface (8) engageable with the tube (10) and moveable between an open position allowing flow of fluid through the tube (10) and a closed position wherein the tube (10) is occluded by the clamping element (7), a connector (6) for connecting the tube with a port on a patient, the connector (6) being removable from the pinch clamp assembly, and a spring (12), wherein the connector (6) is adapted to engage with the clamping element (7) so as to hold the clamping element (7) in the open position, wherein the clamping element (7) is forced from the open to the closed position by the force of the

Abstract: A pinch clamp assembly for engaging a tube with an enteral feeding or infusion pump adapted to feed nutritionals or to infuse medical solutions to a patient, is provided comprising a base (1) comprising holding means (3) for holding a pumping section (10) of the tube in operative engagement with the base (1) and supporting means (5) for supporting a connector (6), a clamping element (7) having clamping surfaces engageable with the pumping section (10) and moveable between an open position allowing flow of fluid through the pumping section (10) and a closed position wherein the pumping section (10) is occluded by the clamping element (7), and locking means adapted to engage with each other in the closed position and adapted to interact with releasing means external to the pinch clamp assembly so as to bring the clamping element (7) from the closed to the open position, a connector (6) for connecting the tube with a port on a patient, the connector (6) being removable from the pinch clamp assembly, the clamping

Abstract: A flow controller controls flow through a deformable conduit by compressing the conduit. The conduit may be compressed along a section of its length. The controller may include a cam driven by an actuator, the cam driving a clamp to compress the conduit. The actuator may be a dial. The cam may be shaped such that the flow rate varies linearly with rotation of the dial. The controller may include a clicker to allow the controller to be set in a number of different positions, allowing ease of adjustment and preventing drift or accidental adjustment of the flow rate.

Abstract: A pinch clamp assembly for engaging a tube with an enteral feeding or infusion pump adapted to feed nutritionals or to infuse medical solutions to a patient, is provided comprising a base (1) comprising holding means (3) for holding a pumping section (10) of the tube in operative engagement with the base (1) and supporting means (5) for supporting a connector (6), a clamping element (7) having clamping surfaces engageable with the pumping section (10) and moveable between an open position allowing flow of fluid through the pumping section (10) and a closed position, a cover element (8) for slidable engagement with the clamping element (7) and the connector (6), the cover element (8) being removable from the pinch clamp assembly, wherein the cover element (8) is mountable to or dis-mountable from the clamping element (7) and the connector (6) only when the clamping element (7) is in the closed position, wherein in the mounted position of the cover element (8) the clamping element (7) can be brought into the op

Abstract: An infusion pump for metering fluid flow through an delivery tube of an infusion tubing set has an internal occlusion clamp which clamps the delivery tube to prevent the free flow of fluid through the tube when access to the delivery tube in the infusion pump is possible. To release the delivery tube from the infusion pump, a slide clamp is manually used to release the occlusion clamp to an open, non-occluding position while simultaneously occluding the delivery tube to prevent the free flow of fluid.

Abstract: A clamping assembly includes a body having a base and an arcuate body portion secured to the base. The arcuate body portion defining at least one opening dimensioned to receive a tubular member having a lumen. The clamping assembly further includes a slide member adapted to slide along the arcuate portion between an open position and a closed position. The slide member is movable along the arcuate body portion to compress the tubular member received within the body against the base to obstruct the lumen of the tubular member when the slide member is in the closed position.

Abstract: A self-cleaning suction device has a user's suction end that self-sanitizes externally and internally before and after use, as well as self-sanitizes internally during use. A cover opens to reveal the user's suction end within a containment unit. As the cover opens, the suction end travels from a lower chamber, proceeds through a middle chamber of a sanitizing agent, and is presented for use. After suction is complete, the suction end retracts through an upper chamber with, a scraping feature that removes debris from the outer surface of the mouthpiece, and proceeds down through the middle chamber of a sanitizing agent and a scraping feature that removes debris and the sanitizing agent from the outer surface of the user's suction end. Upon the sealing closure of the cover, the upper and middle chambers are flushed with a sanitizing agent, which is suctioned away along with any collected debris.

Abstract: The illustrative embodiments described herein are directed to apparatuses, systems, and methods for managing liquid flow associated with a tissue site that involves using reduced pressure to control fluid flow. In one instance, an apparatus includes a first valve and a second valve in fluid communication with a reduced-pressure source. The valves are movable between an open position and a closed position and are operable to change flow status (open to closed or vice versa) based on a presence of reduced pressure. At least one of the first valve or the second valve is in the closed position to obstruct a flow of a liquid while the other is in the open position. The apparatus also includes a reservoir fluidly coupled to the first valve and the second valve. Other systems, methods, and apparatuses are presented.

Abstract: An automatic safety occluder provides an occluder for an infusion set that is biased in a closed position until an electrical signal is received that causes the occluder to open. Should the occluder fail to be installed correctly, or if power is removed, the occluder will return to its biased closed position, preventing free flow. The occluder may also be placed in an integrated unit such that the automatic safety occluder may attach to the tubing as a unit.

Abstract: A tube clamping system includes a Bowden cable with an inner member and an outer casing. A first jaw element has a first tube abutment surface, a passage, and a first sliding latch portion. The inner member passes through the passage. A second jaw element has a second tube abutment surface, a cable guide, and a second sliding latch portion. The inner member has a first end held in the mated sliding latch portions so that sliding of the inner member results in selectably positioning the first and second tube abutment surfaces together or spaced apart. An actuator coupled to a second end of the outer casing and a second end of the inner member applies a force to slide the inner member within the outer casing, the passage, and the cable guide. The Bowden cable substantially isolates the tube being clamped from the weight of the actuator.

Abstract: An apparatus for removing body fluids from a body cavity by suction, such as a thorax, gastric or any other human body cavity or a wound, comprises means (9) to increase the pressure difference between a pressure in a drainage lumen (3) and a pressure in the atmosphere when an auxiliary lumen (5) is open. The apparatus enables removal of clots or other plugs of the catheter and drainage tube in an efficient and not patient disturbing way.

Abstract: An improved anchor system and method for holding an intravenous catheter to the patient's body that is easier to clean. The system includes an intravenous catheter having a main line, a yoke attached to the main line, an elastic band made of non-porous material, and a neck lanyard with a clamp. During use, the elastic band is positioned around the two lumens and twisted into a figure eight configuration, forming two loops. Each lumen is extended into one of the elastic band's two loops. The lanyard's clamp is then attached to the crossover section of the elastic band located between the two loops. The elastic band is sufficient in size and resiliency so that when the clamp is released, each loop may be stretched so the lumens may be removed so the elastic band may be replaced.

Abstract: The present invention provides a pinch clamp that includes a support leg member and a coupling leg member, which are interconnected by a curved portion, and a generally upwardly extending anchor portion having at least one anchoring flange located at the distal end of the anchor portion. The pinch clamp also contains at least one tabular member which extends outward from the anchor portion, which facilitates opening of the pinch clamp.

Abstract: A tube clamp having first and second opposed jaws (1012, 1014) joined by a hinge (1016), the jaws (1012, 1014) movable between open and closed positions, the tube clamp adapted to attach to a flexible plastic tube (1024) so that the tube (1024) passes between the jaws (1012, 1014), whereby the flow of fluid through the tube (1024) is permitted when the jaws are open but is blocked when the jaws are brought together to the closed position to pinch closed the tube there-between, and locking means (1048,1036,1042) to effect substantially permanent and irreversible locking of the jaws (1012, 1014) in the closed position.

Abstract: A system for controlling flow of a fluid in a tube with a controlling device includes a pinch clamp. The pinch clamp has a first leg, a second leg, a connecting region there between, a pinching region, and a first part of a quick release connector. The first leg and the second leg are both connected to the connecting region. Whether the pinching region is in an open position or in a closed position is determined by spacing between the first leg and the second leg. The first leg includes the first part of the quick release connector. The first part of the quick release connector includes an element for quickly mounting the pinch clamp to the controlling device and for quickly dismounting the pinch clamp from the controlling device.

Abstract: An apparatus and method are disclosed for controlling infusion of liquid into a patient using a peristaltic pump. The liquid infusion apparatus includes a liquid conduit having a proximal segment, a distal segment and an intermediate segment. The liquid infusion apparatus also includes a flow valve in fluid communication with the intermediate and distal segments. The flow valve includes a shuttle member slidably disposed within a housing about the distal segment, the shuttle member being configured for lateral movement relative to an elongated axis of the distal segment. The shuttle member is configured to operate in a first configuration to impede fluid flow through the liquid conduit and in a second configuration for which fluid flow through the liquid conduit is unimpeded. The shuttle member includes a resilient grasper for selectively engaging and disengaging a mating actuator resiliently received by the grasper.

Abstract: Systems, methods, and devices for preparation of purified water and medicaments for various uses including blood treatment are described. Methods, devices, and systems for creating multiple-treatment batches are described.

Abstract: An infusion pump for metering fluid flow through an delivery tube of an infusion tubing set has an internal occlusion clamp which clamps the delivery tube to prevent the free flow of fluid through the tube when access to the delivery tube in the infusion pump is possible. To release the delivery tube from the infusion pump, a slide clamp is manually used to release the occlusion clamp to an open, non-occluding position while simultaneously occluding the delivery tube to prevent the free flow of fluid.

Abstract: A clamp for clamping flexible tubing is disclosed. The clamp includes a body having a first portion, a second portion, a first passage through the first portion, and a second passage through the second portion. The first passage is configured to compress a first length of the flexible tubing when the flexible tubing is displaced laterally into the first passage. The second passage is configured to compress a second length of the flexible tubing that does not overlap the first length when the flexible tubing is displaced laterally into the second passage.

Abstract: A device, system and method for occluding fluid flow through an infusion set detached from a patient's body. The device includes a means for detecting loss of contact to a patient's body and activating an occlusion mechanism accordingly.

Abstract: A connector for a fluid transport line of a medical device including: a first body having a first access port, a second access port, and a first fluid path extending through the first body and directly connecting, for fluid transport, the first access port and second access port; a second body, mountable to the first body, having a third access port, the second body being movable with respect to the first body between (i) a main operating position in which the first fluid path is interrupted and in which a second fluid path is defined and enabled from the first access port to the third access port, and (ii) an auxiliary operating position in which the first fluid path is enabled and in which the second fluid path is interrupted.

Abstract: A device for providing blood and/or fluid to a patient is provided. The device includes a dispensing end, a blood pathway and a fluid pathway. An end cap is at the fluid dispensing end. A joining member is located proximate to the end cap and joining the blood pathway and the fluid pathway. A first group of medical components is disposed along the blood pathway, including at least one clamp, a blood filter, and a pump adaptor. A a second group of medical components is disposed in the fluid pathway, including at least one clamp, and a pump adaptor. The joining member is located downstream from the first and second groups of medical components and upstream from the end cap.

Abstract: The present invention relates to a telescopic device comprising at least two sections, wherein an extraction force is needed to extend the device from a short telescope configuration to an extended configuration and securing the sections in extended configuration; a separation force is needed to pull the at least two sections apart; retention means coupling at least one of the two sections to at least one attachment point; and the uncoupling strength of the retention means is larger than the extraction force but smaller than the separation force. This allows the telescopic device to be properly extended into its extended configuration before the retention means uncouples the telescopic device from the at least one attachment point.

Abstract: An anti-free-flow mechanism includes an occluder mechanism which is disposed along a segment of tubing. The occluder mechanism is normally in a biased closed position, but may be moved into an open position by moving an engagement member into engagement with the tubing segment to deform the tubing segment and open a flow channel. Unless force is applied to keep the engagement member in contact with the tubing segment, the tubing will return to the first, closed position.

Abstract: A clamping assembly includes a first clamping member and a second clamping member. The first clamping member defines a first lumen dimensioned to non-rotatably engage a first portion of a tubular member. Rotating the first clamping member effects a rotation of the first portion of the tubular member. The second clamping member defines a second lumen dimensioned to non-rotatably engage a second portion of the tubular member. Rotating the second clamping member in relation to the first clamping member rotates the second portion of the tubular member in relation to the first portion of the tubular member to twist the tubular member to restrict flow through the tubular member.

Abstract: A clamp guard for securing to flexible tubing such as catheters and their extension tubes and about a clamp therealong for housing the clamp at least when the clamp is in a tubing-clamping state, to prevent inadvertent contact of the clamp by a foreign body and undesirable unclamping of the clamp. The clamp guard is removable from around the clamp when desired.

Abstract: A medical clamp having a semi-circular front engagement portion with reciprocal transverse grooves formed in the opposing clamp surface. The semi-circular engagement portion allows for easy alignment, safe operation and completely eliminates the possibility of misalignment and unintentional release.

Abstract: In renal haemodialysis there is a condition whereby the patient can by at serious risk of harm if the venous line becomes disconnected or the venous needle becomes dislodged and the haemodialysis machine does not detect this condition. The invented device is designed to safeguard haemodialysis patients from serious losses of blood through venous line disconnection or venous needle dislodgement. The invented device is designed to clamp the venous line automatically before venous needle dislodgement or venous line disconnection becomes a serious problem and to make the haemodialysis machine stop drawing blood from the patient This will cause the haemodialysis machine to alarm in the normal way so as to alert the patient or healthcare worker to the problem. The invented device will have to be manually reset before therapy can continue.

Abstract: The present invention provides a system and a method for distending a body tissue cavity of a subject by continuous flow irrigation by using a dynamic pump, such as a centrifugal pump, on the inflow side and a positive displacement pump, such as a peristaltic pump, on the outflow side, such that the amplitude of the pressure pulsations created by a the said outflow positive displacement pump inside the said tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method for accurately determining the rate of fluid loss, into the subject's body system, during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate.

Abstract: Positive displacement fluid lock ports for use in combination with an indwelling catheter and a syringe during a flushing/locking procedure are provided. The fluid lock port includes a housing having a distal and a proximal end; a resilient conduit supported within the housing, wherein the conduit defines a lumen therethrough; and at least one biasing member supported in the housing and being operatively associatable with the resilient conduit. The at least one biasing member has a first condition restrained from deforming the resilient conduit and a second condition operatively engaged with the resilient conduit to at least partially occlude the lumen of the resilient conduit.

Abstract: Transfer sets are disclosed in the present patent. The transfer set provides a connection between a source of peritoneal dialysis fluid and a patient for whom peritoneal dialysis has been prescribed. The transfer sets disclosed herein are smaller and provide a more compact and convenient device by which a dialysis patient controls the flow of dialysis fluid to and from the peritoneum of the patient. The devices are more compact and convenient because they include more convenient mechanisms for starting and stopping flow of the dialysis fluid. It is also easy to determine whether the mechanism is in a closed or open configuration by simply looking at the mechanism.

Abstract: An enteral feeding apparatus has a pump system including a bearing surface, a platen and a retainer mounted on the platen. The retainer has a first engagement member. A feeding set includes a cassette and a lumen attached to the cassette. The lumen has a peristalsis loop for extending around the bearing surface and the cassette has a second engagement member adapted for engagement with the first engagement member of the retainer to thereby secure the cassette to the pump system. The lumen is in tension when the peristalsis loop is extended around the bearing surface and the first and second engagement members are engaged. The second engagement member of the cassette is biased into engagement with the first engagement member of the retainer by the tension on the lumen.

Abstract: A feeding set for a peristaltic pump system includes a cassette configured for releasable connection thereto. A deflectable lumen priming actuator is formed integrally with the cassette for conjoint connection to and disconnection from the pump system with the cassette as a single unit. The priming actuator includes an actuation pad and is moveable from a rest position to a deflected position. A substantially flexible lumen is coupled to the cassette. The lumen has an inlet, an outlet, and an extensible peristalsis loop. An inline valve is received within the lumen. The inline valve is arranged to obstruct fluid flow through the lumen. The actuation pad of the priming actuator is located proximate the inline valve in the rest position and is adapted to contact and apply a force to the lumen adjacent the inline valve when the priming actuator is moved to the deflected position. The force applied to the lumen is sufficient to establish at least one flow channel between the inline valve and the lumen.

Abstract: A fluid path for delivery of a fluid comprises first and second flexible tubes, each tube defining a transverse formation extending generally perpendicular to its longitudinal axis. Used to maintain the transverse formation in each tube, a clip mechanism includes a body comprising opposing flanges, each opposing flange defining at least a pair of recesses, each of the pair of recesses receiving one of the first and second flexible tubes, respectively, to define the respective transverse formations. The clip mechanism includes a support section connecting the opposing flanges such that the clip mechanism extends across the transverse formations and maintains their configuration. Due to the transverse formations, fluid contained within either tube at one end portion thereof cannot flow through the length thereof to displace a less dense fluid contained therein at the other end portion thereof under gravitational flow.

Abstract: A clamp (10) for a flexible tube, in particular an infusion tube, composed of a substantially U-shaped plastic band, the free end (111) of the first branch (11?) of the U being bent over to form the clamp head (11), to the free end (121) of the second branch, or back (12), so that, when closed, the back's free end (121) rests under the head's free end (111), and when opened, the back's free end (121) is at a distance above the head's free end (1110. The clamp has openings (114, 134) for extending a flexible tube and two opposite projections (113, 123) for obturating the flexible tube by compressing it when the clamp is closed. Locking means (112, 122) prevent the head end (111) from moving away from the back end (121) when the clamp (10) is in the closed position.