Abstract: Systems and methods of removing bacterial biofilm from a target site using a biofilm removal endoscope. The endoscope has an insertion portion including an imaging channel terminating at a viewing window and an irrigation channel terminating at a nozzle. The imaging and irrigation channels are permanently affixed relative to one another. The insertion portion is inserted into the patient, with a working end thereof being disposed proximate the target site. The target site is imaged and a flow of fluid is dispensed via the nozzle to mechanically remove bacterial biofilm from the target site.

Abstract: In the endoscope system 1, a tissue recovery device 3 that recovers tissue is directly mounted on an endoscope 2. The tissue recovery device 3 has a filter portion, and the filter portion is inserted so as to traverse the conduit of the suction conduit 20 that passes inside the endoscope operation portion 10. The suction conduit 20 opens to the distal end portion of the endoscope insertion portion 11, and the working channel 23 branches off from the branch portion 22 that is provided further on the distal end side than the insertion location of the tissue recovery device 3. With this endoscope system, it is possible to reduce operational burden of the operator with regard to the endoscope system that includes the tissue recovery device that recovers tissue.

Abstract: A disposable protecting cover for an endoscope, the endoscope comprising a endoscope and a disposable valve disk, and the disposable protecting cover comprising a disposable sheath, a clamping tube, a disposable suction tube, a three-way sealing cap, a water air tube, and a protecting cover comprising a hand entrance and an instrument insertion opening.

Abstract: An endoscope comprises: an insertion portion to be inserted into a body cavity; an operation portion provided continuously from a proximal end side of the insertion portion; and a cylinder in which a gas to be fed to the distal end of the insertion portion is compressed and filled, the cylinder being detachably attached to the operation portion.

Abstract: An insufflation apparatus includes a housing defining a port for receipt of insufflation gases and an elongated sleeve defining a longitudinal axis. The elongated sleeve has a proximal end and a distal end and defines a sharpened tip. A stylet is disposed within the elongated sleeve. The stylet is movable between an extended position, wherein the stylet extends beyond the tip of the sleeve, and a retracted position, to expose the sharpened tip for penetration through body tissue. At least one of the elongated sleeve and the stylet defines a passageway in fluid communication with the port to direct the insufflation gases into a body cavity. An image sensor is positioned on the elongated sleeve. The image sensor is adapted to receive an optical image of an area adjacent the distal end of the elongated sleeve and is configured to transmit the optical image for viewing by a clinician.

Abstract: An endoscopic system includes an endoscope having a delivery member available to supply a body cavity of a specimen and, in addition thereto, a gas supply apparatus from which predetermined gas is supplied to a body cavity via a delivery member. The endoscopic system further includes a determination unit that determines whether or not there is a status in which, the gas supply device needs to supply gas to the body cavity, and a control unit that selectively and automatically control a permit and stop for the gas supply to be implemented by the gas supply apparatus depending on a determined result of the determination unit, which are formed in a unitary structure with, for instance, the gas supply unit.

Abstract: A continuous flow irrigation endoscope and a continuous flow irrigation fluid management system, both designed to be compatible to each other and meant to function as a single system. The endoscope and the fluid management system are synergistic to each other such that both enhance the efficiency of each other. The system allows a body tissue cavity to be distended by continuous flow irrigation so that the detached tissue pieces and waste fluid present inside a body tissue cavity are continuously automatically evacuated from the tissue cavity without causing the cavity to collapse at any stage and without the need of withdrawing the endoscope or a part of the endoscope from the tissue cavity.

Abstract: A reinforced arthroscope comprising external ribs to provide for a number of separate fluid channels, such as inflow, outflow and interstitial tissue drainage, when the arthroscope is slipped into a disposable external sheath. The arthroscope is constructed to be sufficiently rigid so as to penetrate and move within a joint without damaging the rod optics inside. The externality of the arthroscope channels allow for cleaning and sterilizing the scope between uses.

Abstract: A gas supply source for supplying gas and a channel along which the gas is supplied can be easily switched by providing an instrument channel for passing an endoscope treating tool, a gas and water supply channel for supplying carbon dioxide etc. to the inside of a body, a gas supply source for a visceral cavity capable of supplying gas at a predetermined pressure, a gas supply source for a lumen capable of supplying gas at an optional pressure, and a switch device for switching from any of and an instrument channel and a gas and water supply channel to any of the gas supply source for a visceral cavity and the gas supply source for a lumen.

Abstract: An air/water channel is split into smaller-diameter branch channels before the air/water channel enters a bending portion so as to create a space within a joint ring constituting the bending portion. A forceps channel having the largest outer diameter among internal components of the joint rings is disposed at the center of the joint rings. In addition to the branch channels, optical fibers as a light guide, a signal line, and the like are arranged around the forceps channel within the joint rings. By eliminating the created space, a diameter of the joint rings is reduced and thus a diameter of an insertion section is reduced.

Abstract: A medical system includes an endoscope which is a first medical instrument, a gas supply apparatus which is a second medical instrument that supplies a gas to an insertion site at which an insertion portion of the endoscope is inserted, a biological information acquiring apparatus which is a biological information detection section that detects a blood flow rate at the insertion site as a biological information detected value, a manipulation information acquiring apparatus which is a manipulation information detection section that contacts the insertion portion of the endoscope and is combined with a roller that rotates as the insertion portion moves forward or backward to detect an amount of rotation of the roller as manipulation information, and a system control apparatus provided with a control section that outputs an instruction signal for changing an amount of gas supply to the gas supply apparatus according to the detected value detected by the biological information acquiring apparatus and the manipula

Abstract: An endoscope washing and disinfecting apparatus of the present invention includes a first channel member in which a projection portion abuts on a fitting surface in a channel mouthpiece, and a first channel internally provided communicates with a suction channel inside the channel mouthpiece, a second channel member which is fitted and fixed to an outer periphery of the first channel member, and is internally provided with a second channel which communicates with the first channel, a pressing member which is provided in the second channel, and presses the first channel member to the channel mouthpiece side in the second channel, and a liquid introduction port which is formed in the second channel member and introduces a liquid to the second channel.

Abstract: An endoscope comprises: an insertion portion to be inserted into a body cavity; an operation portion continuously provided from a proximal end side of the insertion portion; and a suction section that performs suction from an distal end of the insertion portion, wherein the suction section comprises: a cylinder in which a gas is compressed and filled; a nozzle unit that generates a negative pressure inside the nozzle unit by jetting out the gas in the cylinder; and a liquid receiver tank communicated with the distal end of the insertion portion, the negative pressure inside the nozzle unit being transmitted to the liquid receiver tank.

Abstract: An embodiment of the invention includes a quantum fluid flow management apparatus which controls and facilitates delivery of liquid and/or air to the surgical site during a surgical procedure via a trumpet valve, various restriction (crimping) devices, and a network of tubing for selectively passing air or fluid through to the surgical site. The trumpet valve allows for selective control of air or fluid or both or neither. Additionally the flow management apparatus controls the application and suction of fluids from the surgical site which may be used in cooperation with the injection of a fluid such as water to irrigate the surgical site to remove body fluids, debrided material or the like.

Abstract: A combined tube set for a disposable water bottle for a medical instrument includes a cap with threads suitable for attachment to various water bottles. The combined tube set provides a first tube set for rinsing that includes an air and water tubes, and air/water connector The combined tube set also provides a second tube set for irrigation that includes an irrigation connector, backflow valve(s), and flexible tubing section. In some embodiments, the tube set can provide warm and/or humid gas to the endoscope.

Abstract: A hybrid apparatus for delivery of fluid in connection with endoscopic irrigation and lens cleaning including a connector which is adaptable to a flexible or rigid container, a connector arranged at the end thereof and connected via a tubing supply to a fluid, air and or gas source and to an endoscope during a procedure.

Abstract: The present invention relates generally to the field of endoscopy and specifically to endoscopic apparatus used for endoscopic procedures during which a flexible tube is inserted into the rectum and colon for examination of the colon interior for abnormalities. More particularly, the present invention refers to a control system for supplying a fluid medium, e.g. air, carbon dioxide, water, to the endoscope.

Abstract: An endoscopic instrument with a hollow shank which on the proximal side is provided with a connection part with at least one suction connection and/or rinsing connection, with a coupling part for fixing a working insert. The coupling part is mounted rotatably with respect to the connection part and the coupling part is detachably connected to the connection part. The endoscopic instrument further includes an annular axial seal which is arranged between the connection part and the coupling part.

Abstract: Systems and methods couple a self contained air processing or conveying component to a sheath that is sized and configured to receive a laparoscope including a laparoscopic lens providing visualization of an operating cavity. The air processing or conveying component comprises an air flow path having an inlet sized and configured for communication with a source of CO2 and an outlet. The air processing or conveying component includes a driven air moving component in communication with the air flow path sized and configured to continuously convey CO2 from the source through the air flow path to the outlet. The sheath coupled to the air processing or conveying component can include a lumen communicating with the outlet of the air processing or conveying mechanism for passing CO2 continuously conveyed by the driven air moving component across the laparoscopic lens to maintain visualization of the operating cavity.

Abstract: A watertight junction box includes a box body, a lower floating plate, an upper floating plate, a lock cap, a modular cable inserted into the box body and kept in contact with sharp copper contacts, a holding down plate for holding down an external power wire on the upper floating plate to cause electric contact between the external power wire and the sharp copper contacts, and a predetermined amount of silicon rubber filled in between the lower and upper floating plate that is deformed to wrap about the connection area between the sharp copper contacts and the external power wire when the lock cap is tightly fastened to the box body to force down the holding down plate.

Abstract: An air shield for a videoscope imager to prevent obscuring of the optical input by body liquids and tissue particles. The imager is extended through a tube carrying a pressurized gas so that when the gas escapes from the end of the tube, it generates an air stream envelope around the optical input of the imager and prevents liquids and particles directed toward the optical input from contacting the optical input. The pressurized gas flows continuously during the medical or dental procedure to maintain a constant resistance to liquids and matter directed to the optical input of the imager.

Abstract: A fluid delivery system for use with an endoscope. Certain embodiments of the invention include a single, large fluid source and pump installed upon an operator console, in combination with a small fluid reservoir and pump installed within a proximal connector of the imaging endoscope, multiple fluid sources that feed a common fluid channel that are pressurized by a common pump, multiple fluid sources that feed dedicated fluid channels that are pressurized by dedicated pumps, and a small fluid reservoir and pump installed within a handheld manual controller of the imaging endoscope. The fluid delivery endoscopic systems of the present invention provide the user with the flexibility of changing fluids either in advance of a procedure or on-the-fly as needed, instead of relying on fixed fluid sources only.

Abstract: An endoscope cleaning sheath includes a tube body and a distal end configuration portion. The tube body includes an endoscope disposition hole in which an insertion portion of an endoscope provided with at least an observation window is inserted and disposed, at least one liquid supply hole configuring a liquid supply channel, and at least one gas supply hole configuring a gas supply channel. The distal end configuration portion is fixed to a distal end portion of the tube body. On an inner surface of a distal end surface portion of the distal end configuration portion is provided a fluid mixing portion and a concave portion configuring an ejection opening that ejects a fluid mixture at an observation window of the endoscope. The fluid mixing portion causes liquid supplied through the liquid supply hole and gas supplied through the gas supply hole to merge to mix the liquid and gas.

Abstract: A biological measurement apparatus includes: an endoscope including a treatment instrument insertion channel provided inside an insertion portion; a pump that delivers water into the treatment instrument insertion channel; an optical system, etc., that guide light from a light source that emits light in a predetermined wavelength band into the water delivered into the treatment instrument insertion channel; and a spectroscope that detects return light resulting from the light passing through the water, falling on and being reflected by an object and returning while passing through the water when the water is delivered from the pump.

Abstract: A liquid mixing apparatus of the present invention includes: a first tank; a first introduction section that introduces a first liquid into the first tank; a second introduction section that introduces a second liquid into the first tank; a first opening portion provided above a highest liquid level of the first tank; a second tank; a third introduction section that introduces a third liquid into the second tank; a second opening portion provided above a highest liquid level of the second tank; a liquid transfer conduit that connects a bottom surface portion of the first tank and a bottom surface portion of the second tank; an opening/closing valve provided in the liquid transfer conduit; a gas transfer conduit having one end arranged above the highest liquid level in the first tank and another end arranged above the highest liquid level in the second tank; a pump capable of forward/reverse operation that can transfer a gas in two directions inside the gas transfer conduit; and an atmospheric release control

Abstract: A laparoscopic lens cleaner which is suitable for maintaining the lens of a laparoscope in a clean, dry condition during a laparoscopic surgical procedure is disclosed. An illustrative embodiment of the laparoscopic lens cleaner includes an elongated cleaner sheath having a sheath interior, a fluid conduit provided in the cleaner sheath, a fluid discharge nozzle provided in the sheath interior and communicating with the fluid conduit, a gas conduit provided in the cleaner sheath and a gas discharge nozzle provided in the sheath interior and communicating with the gas conduit.

Abstract: An adapter for coupling a disposable water bottle to an endoscope including a cap manufactured from a thermoplastic elastomer material. The cap is removably secured to an associated water bottle. The cap includes a first port and a second port. The adapter further includes a scope connector manufactured from the thermoplastic elastomer and/or thermoset elastomer having a first scope connector port and second scope connector port, wherein the scope connector is configured to be frictionally coupled to an endoscope. A first supply tube couples to the first port of the cap and the first scope connector port and a second supply tube coupled to the second port of the cap and the second scope connector port. By using a thermoplastic elastomer and/or thermoset elastomer material, a simplified adapter is provided, which substantially reduces design and manufacturing costs.

Abstract: An endoscope insertion portion of this invention includes an air/water feeding portion for spouting gas or liquid from a spouting port to outer surfaces of the first observation optical system and the second observation optical system, which is disposed on the distal end portion so as to line up with the first observation optical system and the second observation optical system on a generally straight line. The air/water feeding portion is disposed on the distal end portion such that a spouting direction of the gas or the liquid has a first angle with respect to the first direction.

Abstract: An endoscopic gaseous material feed system comprises a gas feeder 3 having a gas tank 60 containing carbon dioxide gas, a light source 2 incorporating an air pump 23 for air supply, an endoscope 1 internally having a gaseous material passage for a gas or air supply to a body cavity of a patient or examinee, and a controller 80 adapted to put the air pump 23 of the light source 2 in a deactivated state upon detection of a start of a carbon dioxide gas supply from the gas feeder 3.

Abstract: The medical procedure via a natural opening according to the present invention includes: adjusting the patient's body so that a target site on the anterior wall of a hollow organ faces in the direction opposite to the direction of gravitational force; introducing a liquid inflow conduit in the vicinity of the target site, and flowing liquid into the hollow organ via the liquid inflow conduit, to form a liquid holding area and a gas retaining area inside the hollow organ; introducing an observation device into the hollow organ, and confirming the position of the target site from the position of the gas retaining area; and incising while observation the target area.

Abstract: A laparoscopic lens cleaner which is suitable for maintaining the lens of a laparoscope in a clean, dry condition during a laparoscopic surgical procedure is disclosed. An illustrative embodiment of the laparoscopic lens cleaner includes an elongated cleaner sheath having a sheath interior, a fluid conduit provided in the cleaner sheath, a fluid discharge nozzle provided in the sheath interior and communicating with the fluid conduit, a gas conduit provided in the cleaner sheath and a gas discharge nozzle provided in the sheath interior and communicating with the gas conduit.

Abstract: An endoscope accessory, used with an endoscope including a suction conduit communicating with a suction device, an accessory insertion channel, and an operation portion at which entrances of the conduit and channel are formed, includes a tubular insertion unit to be inserted into the channel through the entrance of the channel and to be movable along the channel, and a tubular connection unit provided at a proximal end of the insertion unit and detachably connected to the entrance of the suction conduit. An endoscope system is constituted by combining the accessory with the endoscope. In a method for mounting the accessory onto the endoscope, the insertion unit of the accessory is inserted into the channel through its entrance in the operation portion of the endoscope to be movable along the channel, and the connection unit of the accessory is detachably connected to the entrance of the conduit.

Abstract: Foil bags are used as a primary packaging for liquids, the bags permitting the liquid to be taken therefrom without the application of a considerable amount of force. A container is provided for a medicinal liquid, the container being gas-tight and liquid-tight so that it is storable over many months. The container includes a collapsible foil bag on which a flange, which is stable in respect of shape, is disposed. The flange is designed for fitting onto a discharge connection member. The container can be disposed in a casing which is stable in respect of shape. The medicinal liquid does not come into contact with air and is protected from the effect of light. The medicinal liquid may be dispensed from the foil bag in many partial quantities over a prolonged period of time, with a respective partial amount thereof being converted into an aerosol by means of an atomizer.

Abstract: An endoscope system includes a rigid endoscope including an optical system in a rigid insert section thereof, and a wiper sheath. The wiper sheath includes a wiper insert section receiving the insert section of the rigid endoscope, a wiper arranged on a distal end portion of the wiper insert section and enabled to be placed in contact with a distal-end face of the rigid endoscope received in the wiper insert section, and an operation unit, arranged at a proximal end portion of the wiper insert section, for switching the wiper between a contact state with the wiper placed to be in contact with the distal-end face of the rigid endoscope and a detached state with the wiper spaced apart from the distal-end face of the rigid endoscope, and for moving the wiper on and along the distal-end face of the rigid endoscope when the wiper is in the contact state.

Abstract: A surgical instrument has a gas-delivery device to supply a noble gas or other inert gas to a tissue-treatment region and a rinsing device for rinsing a target region, in particular a tissue-treatment region. In the instrument the rinsing pressure is generated by the inert gas supplied by the gas-delivery device.

Abstract: The inventive endoscopy system includes a cannula for arranging an endoscope and forming, between said cannula and endoscope, an irrigation or aspiration channel for transporting an irrigation or aspiration fluid, respectively, a connection ring mounted around the cannula and provided with a connection channel connectable to the irrigation or aspiration channel, respectively and a connector which is mounted on the connection ring and includes a transport channel with the connection channel and a first pressure sensor for detecting pressure in the transport channel. The connection ring is provided with a bypass circuit connectable to the irrigation or aspiration channel, respectively and the connector including a dead channel connectable to the bypass circuit and a second pressure sensor for detecting pressure in the dead channel.

Abstract: The present invention is related to a suction device especially designed for laparoscopic and/or arthroscopic instruments, including at least two cylindrical suction ports located at both sides of the distal end of the laparoscopic and/or arthroscopic instrument. Each suction port has inside and next to the distal end thereof at least one sharp traversing blade. Each suction port is connected to a suction line in turn connected to a suction pump. The external end of said suction line is connected to a disposal recipient into which the debris, blood, coagula etc removed from the surgical site will be disposed.

Abstract: An actuator system including a drive section that performs driving by injection/suction of a liquid, a tube, a syringe pump that injects/suctions the liquid into/from the drive section via the tube, a pressure sensor that measures an inner pressure, a storage section that preliminarily stores a volume change ?V of the tube caused by the inner pressure, and a control section that controls the syringe pump based on the volume change ?V, inner pressure P, and volume V0 of the liquid injected/suctioned into/from the drive section.

Abstract: A video inspection system provides capability to view objects not satisfactorily accessible by direct line of sight. The video inspection system includes a fluid ejection nozzle to clear the workpiece area to be inspected, an adjustable focus camera and connections to remote image data processing equipment. The video inspection system includes a sapphire lens cover to protect the optical lens and a tip protection boot to protect the viewing head from damage by contact with the work being inspected.

Abstract: The endoscope applicator according to the present invention allows lubricant to be supplied uniformly to the entire inner surface of the endoscope applicator without increasing the diameter of the endoscope applicator because the lubricant supply path is laid on the outer surface of the endoscope applicator extending from the base end portion to the tip portion of the endoscope applicator and a plurality of openings are formed in the lubricant supply path and endoscope applicator at predetermined intervals in such a way that their opening areas of the opening increase from the base end portion to the tip portion. Moreover, the endoscope apparatus according to the present invention can improve the maneuverability of the insert portion and applicator during pull-in operation. Furthermore, the endoscope apparatus according to the present invention makes it possible to determine pull-out force quantitatively.

Abstract: A cassette insertable into an irrigation or aspiration machine for endoscopy includes an irrigation or an aspiration tube and a support provided with one or two inlet plugs and one or two outlet plugs where two tubes form an elbow to be connectable to the inlet or outlet plugs in an input and output direction of motion, respectively and to form an irrigation or aspiration pumping area in the input and output direction of motion. The support includes a T-shaped guide according to the head of the T for protecting the elbow of each tube and according to the length of the T body in a slot guiding the tube in the output direction. The T-shaped guide extends between one or two inlet plugs to form the irrigation or aspiration pumping area on both sides of the slot between each inlet plug and the head of the T.

Abstract: The present invention provides an adaptor that is suitable for attachment to an endoscopic device for delivery of a secondary gas. The adaptor can comprise a substantially cylindrical body with a two, opposing closed ends, two fluid transport channels extending through the cylindrical body and opening at the closed ends, and an inlet port extending outward from the cylindrical body and being in fluid connection with one of the fluid transport channels. The adaptor may be used in endoscopy methods and is particularly useful for adding a secondary gas source in an endoscopy procedure.

Abstract: Apparatus and method for detecting connectivity in a channel in an endoscope undergoing reprocessing using an automatic reprocessor, the apparatus including a source of pressurized fluid which may be a gas alone or gas and liquid and a back pressure detector connected to the channel or channels of interest in the endoscope, the method including providing a source of pressurized fluid, directing the pressurized fluid to a channel in an endoscope, monitoring the time for the back pressure in the pressurized fluid to decay to a predetermined level; and determining whether the channel is connected and open or disconnected by comparing the decay time of the actual back pressure to one or more predetermined values corresponding to the specific channel or channels and model of endoscope undergoing reprocessing.

Abstract: A medical instrument for observing the interior of a subject to be examined has an image pickup unit for picking up an image of the subject to be examined from a transparent cover member incorporated in the medical instrument, disposes a multi-bladed fan outside an image-pickup field of view of the image pickup unit, generates an airflow to an airflow outlet that causes the airflow to flow from the inlet port to the vicinity of an observation window, prevents adherents such as dirt from sticking to the cover member, prevents the adherents from sticking to the observation window of the observation apparatus without obstructing the field of view, and can thereby obtain a clear observed image.

Abstract: An apparatus includes a tubular structure having a proximal end, a distal end, and a body extending between the proximal and distal ends, wherein the body includes a lumen for housing at least a part of an imaging device, and a fluid delivery channel that is fixed in position relative to the body, and an opening that is in fluid communication with the fluid delivery channel, wherein the fluid delivery channel has a first portion, and a second portion that forms an angle with an axis of the first portion.

Abstract: An endoscope is provided having an observation port, a fluid supply pipe, a cap, a fluid ejection channel, and a direction adjustment protrusion. The observation port is provided at the distal end of the endoscope, and collects light reflected from an object. The fluid supply pipe transmits gas and/or liquid to the distal end. The cap blocks the distal end of the fluid supply pipe and is configured so that a partially enclosed semispherical space is created between the distal end of the fluid supply pipe and the inner surface of the cap. The fluid ejection channel has an outlet in the direction of the observation port, and extends from the edge of the opening at the distal end of the fluid supply pipe to the outlet and occupies the semispherical space inside the cap. The direction adjustment protrusion extends over the outlet in the lengthwise direction of the fluid ejection channel.

Abstract: The inventive endoscopy system includes a cannula for arranging an endoscope and forming, between said cannula and endoscope, an irrigation or aspiration channel for transporting an irrigation or aspiration fluid, respectively, a connection ring mounted around the cannula and provided with a connection channel connectable to the irrigation or aspiration channel, respectively and a connector which is mounted on the connection ring and includes a transport channel with the connection channel and a first pressure sensor for detecting pressure in the transport channel. The connection ring is provided with a bypass circuit connectable to the irrigation or aspiration channel, respectively and the connector including a dead channel connectable to the bypass circuit and a second pressure sensor for detecting pressure in the dead channel.

Abstract: The invention provides an apparatus and methods for depositing materials on a substrate, and for performing other selected functions, such as material destruction and removal, temperature control, imaging, detection, therapy and positional and locational control. In various embodiments, the apparatus and methods are suitable for use in a tabletop setting, in vitro or in vivo.

Abstract: An endoscope according to the present invention includes an endoscope main body, in which a channel having at least one end communicated with the outside is inserted and which is covered with an exterior member, and a communicating hole which is arranged in the halfway of the channel and which introduces vapor in the channel so as to sterilize the channel with the vapor.

Abstract: A control system for supplying fluid medium to an endoscopic apparatus which comprises an operation handle and an insertion tube provided with an insufflation channel, an irrigation channel and a suction channel extending therealong. The control system is provided with a system control unit with at least one source of a first fluid medium, with a source of a second fluid medium, with a source of vacuum and with a multifunctional connector for bringing the operation handle in fluid and electrical communication with the system control unit. The source of the first fluid medium and the source of the second fluid medium are simultaneously connectable to and disconnectable from the insufflation channel and the irrigation channel.