WO1990015569A1 - Television camera system for use in sterile conditions - Google Patents
Television camera system for use in sterile conditions Download PDFInfo
- Publication number
- WO1990015569A1 WO1990015569A1 PCT/DE1990/000475 DE9000475W WO9015569A1 WO 1990015569 A1 WO1990015569 A1 WO 1990015569A1 DE 9000475 W DE9000475 W DE 9000475W WO 9015569 A1 WO9015569 A1 WO 9015569A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- camera system
- camera
- cable
- control unit
- lamp
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G11/00—Arrangements of electric cables or lines between relatively-movable parts
- H02G11/02—Arrangements of electric cables or lines between relatively-movable parts using take-up reel or drum
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/042—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by a proximal camera, e.g. a CCD camera
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B46/00—Surgical drapes
- A61B46/10—Surgical drapes specially adapted for instruments, e.g. microscopes
Definitions
- the invention relates to a television camera system for use in the sterile field with a television camera which can be flanged to an imaging medical device, in particular an endoscope, and which is connected to a separate control unit via a cable.
- a television camera system for use in the sterile field with a television camera which can be flanged to an imaging medical device, in particular an endoscope, and which is connected to a separate control unit via a cable.
- control unit with monitor, power supply unit, etc. can be arranged far apart and therefore does not require sterilization. Only the camera and the connecting cable between the camera and the control unit have to be sterilized before the camera is flanged to the sterilized endoscope.
- both the camera and the cable are covered with a tubular, sterile covering in order to prevent contact between a sterile operator and the non-sterilized part of the television camera system.
- Such a coating is described in German utility model application 687 111.9.
- the coating instructs at one end a bluntly narrowing area which can be fastened between the coupling elements of the television camera and the endoscope in such a way that the non-sterile parts are completely surrounded by the sterile covering after the covering has been slipped on.
- the tubular cover Since the connecting cable often has a length of several meters, the tubular cover must also be several meters long.
- the cover In the commercially available form, the cover is delivered folded several times in sterile packaging. The cover must be spread out for use, and then the television camera with the cable must be pushed through the tubular cover, which is several meters long. Because of the large cable length, this process is cumbersome and can hardly be done by one person. Contact between the sterile person and the non-sterile cable is difficult to avoid.
- the invention is based on the object of providing a television camera system for sterile use in the medical field, in which parts which cannot be sterilized or can only be sterilized with difficulty can be coated with a sterile coating by one person using one hand.
- the invention is characterized in that the control unit of the television camera system has a pull-in device for pulling in the cable.
- the connecting cable can be pulled in completely so that the television camera is held directly on the control unit. This avoids the need to pull a sterile covering over a randomly lying cable or to first bring the cable into a manageable position before covering.
- the camera Before use, the camera is positioned directly on the control unit and the connection cable is pulled into the control unit.
- the cable When the camera is moved away from the control unit, the cable is gradually removed from the pull-in device of the control unit.
- the cable piece removed in each case is led through the hose-like cover.
- the tubular cover has shrunk in length to a fraction of its actual length and is attached to the control unit so that the camera can be gripped through the cover and moved away from the control unit so that the The camera and the cable are automatically covered with the sterile cover.
- control unit has an integrated holding device which receives the television camera when it is not in use.
- the entire television camera system is housed in the control unit to save space.
- a sensor Before opening the integrated holding device, a sensor can be attached to the control unit by means of clamping elements.
- the transducer holds the tubular cover with an open cross section in front of the camera so that the camera can be easily pushed through the cover.
- the transducer is designed as a hollow body which is open on both sides and which, depending on the shape of the camera, has a circular, oval or rectangular cross section.
- the hollow body is attached to a base plate which has a corresponding opening in the area of the opening of the hollow body and which enables the cover to be easily attached to the control unit.
- the cover is slipped over the hollow body in the shrunk state. The camera protrudes so far into the hollow body that it can be easily gripped through the tubular cover and removed from the control unit.
- the transducer of the device according to the invention can also consist of two jaws, which partially surround the tubular coating in the shrunk state.
- tubular cover a preferred choice of material for the tubular cover is characterized, resulting in a tear-resistant and hard-wearing covering that is easy to sterilize and can be produced sterile without difficulty.
- the non-narrowing end of the hose-like cover is firmly connected to the base plate according to claim 7. This ensures that the coating always securely envelops the parts of an instrument to be coated.
- the sensor of the device according to the invention and the base plate can consist of cardboard according to claim S. This embodiment is particularly inexpensive to manufacture. bar
- the base plate and the receiver consist of a thermally formable plastic and are preferably manufactured using deep-drawing technology. This achieves a particularly high level of durability and avoids the use of adhesive materials. Since in this embodiment the end of the tubular cover can also be connected to the base plate by welding technology, the introduction of disruptive vapors, which can originate from adhesives, into the sterile area is reliably prevented.
- the senor has finger depressions at the opening which faces the narrowed end of the tubular coating. This facilitates the removal of the part to be coated after it has been carried out by the transducer.
- the tubular coating is fixed to the transducer with the aid of a sterile adhesive strip.
- This adhesive strip which is designed to be easy to tear open, prevents the coating from slipping off the receiver prematurely.
- the adhesive strip is preferably fastened to the body of the body on the side and spans the covering placed over the transducer.
- the repair strips provided in accordance with claim 10 enable the operating personnel to repair cracks in the tubular coating which may occur due to incorrect operation during use.
- the cover can continue to be used without having to provide the non-sterilizable part of the instrument with a new sterile cover.
- the entire transducer is surrounded by a sterile protective cover.
- This protective cover ensures that the device can be kept sterile.
- the protective cover is only opened when in use. Before opening the protective cover, the transducer can safely come into contact with non-sterile devices or with non-sterile helpers. A non-sterilizable part of an instrument can be inserted into the device holder, even if the protective cover is still closed.
- an optically transparent plate is provided, which is welded into the opening of the coating, for example.
- This embodiment can also be used if the television camera is not to be connected to the eyepiece of an endoscope, but is used to record open operations.
- Claim 12 describes a development of the invention in which the pickup can advantageously be selected to be short.
- the sterile cover is shrunk onto the transducer with the help of vacuum, reducing its length from approximately three meters in the unshrunk state to just a few centimeters.
- a reel-up device is provided in the control unit which clicks the connection cable between the camera and the control unit.
- the retractor ensures that the cable in the housing of the control device is recorded so regularly that damage is excluded that the Cable is not kinked and that it can always be removed easily.
- the cable is wound on a rotatable cable drum which is driven according to claim 14 by a spring mechanism or by a motor.
- the motor is a motor which is provided in the control unit for other purposes, for example as a drive for a fan, and which drives the drum via a magnetic coupling. This further development saves an additional motor and keeps the weight of the television camera system low.
- the control unit with a supply power supply, two adjacent fixed lamps, an optical fiber and a controller.
- the light emitted by a lamp is coupled into one end of an optical fiber cable, the other end of which is flanged to the endoscope.
- One end of the light guide and the coupling optics are arranged on the rotatable drum and can be positioned in front of the lamp being operated.
- the motor or the spring mechanism (claim 14) exerts a torque on the rotatable drum.
- Two positioning devices which counter rotation, are attached to the drum. Depending on which of the two positioning devices is active, the end of the light guide is compared to the first or the second lamp.
- a control device is provided in the lighting device according to the invention, which controls the Positioning device controls such that if the first lamp fails, the associated first positioning device is switched off and the second positioning device is switched on, so that the drum is rotated further until the end of the light guide has assumed the position in front of the second lamp.
- the positioning devices consist of permanent magnets which are attached to the drum and which are guided past a pole of an electromagnet when the drum rotates. Since a permanent magnet with its north pole, the other with its south pci, points in the direction of the electromagnet, depending on the position of the electromagnet, one or the other permanent magnet is attracted to the electromagnet. and held.
- a permanent magnet with its north pole, the other with its south pci points in the direction of the electromagnet, depending on the position of the electromagnet, one or the other permanent magnet is attracted to the electromagnet. and held.
- suitable polarity the end of the light guide is in the intended position in front of a lamp. If the polarity is reversed, the end of the optical fiber faces the second lamp.
- the currently operated lamp and the coil of the electromagnetic element of the positioning device are connected in series.
- the pole of the electromagnet exerts an attractive force on the permanent magnet, provided that the pole facing the electromagnet has an opposite polarity.
- the end of the light guide is held in the predetermined position.
- the automatic change of position and a pole reversal of the electromagnet are carried out by a Controlled switching unit, which consists essentially of a Zener diode, a transistor and a relay.
- the zener diode is connected in front of the base contact of the transistor in such a way that no base current can flow and the transistor thus blocks.
- the circuit is interrupted, which on the one hand breaks the magnetic field of the electromagnet and on the other hand increases the voltage across the zener diode above its breakdown voltage.
- the breakdown of the magnetic field has the effect that the positioning device becomes ineffective and the torque acting on the drum sets the drum into a rotary movement.
- the voltage rise at the zener diode causes a base current to flow through the transistor and thus the transistor's emitter circuit becomes conductive.
- the current flows through the downstream relay, which closes a second circuit in such a way that the second lamp and the coil of the electromagnet are now connected in series and the current flows through the coil in the opposite direction. This creates a magnetic field with reverse polarity in the electromagnet.
- this embodiment of the invention provides further advantages: Since the operated lamp is always connected in series with the coil of the electromagnet, the inrush current is damped by the coil, which extends the life of the lamp.
- the non-operated lamp is connected in parallel to the coil, so that part of the current flows continuously through the lamp and preheats it.
- the described development of the invention results in a lamp change taking place fully automatically if a lamp fails. This minimizes the time for lamp replacement, so that, for example, an operation in the event of a lamp failure does not have to be interrupted or only briefly. In particular when used in the sterile field, it proves to be advantageous that any contact between a sterile person and the non-sterile lighting device is avoided when changing the lamp.
- the drum for winding the connecting cable on the tread has a recessed locking mechanism. This locking mechanism folds out of the recess when the cable is completely wound from the roll and prevents the drum from being rotated further in the unwinding direction.
- an electrical switch is actuated, which switches on the supply voltage for the control unit including the lighting device.
- the television camera system is ready for use after the camera has been removed and the cable has been completely rolled out, without having to actuate another switch.
- a further development of the television camera system is characterized in claim 19, which offers advantages particularly when used in the sterile field.
- the control lines for the television camera and the light guide for transmitting the illuminating light from the illuminating device to the endoscope are arranged in a single cable. This ensures that only one cable has to be covered with a sterile covering when used in a sterile area.
- both the electrical feed for the camera and the light guide are accommodated in the control unit in a space-saving manner.
- the connection between the television camera and the electrical leads and the light guide is achieved with a single connection point on the back of the camera.
- a connection point is provided on the camera for the connection of the light guide to the light guide of the endoscope, which is preferably attached to the front of the camera.
- the advantages achieved by the invention are, in particular, that the use of the television camera system in the sterile field is considerably simplified.
- the system is housed in a housing to save space be prepared for use by a sterile person using one hand.
- the covering does not have to be spread out before the non-sterilizable parts are wrapped.
- the non-sterilizable parts of an instrument can be pulled over by one person using ⁇ hand control.
- the length of the parts of instruments to be sterile covered does not have a negative effect on the handling of the device according to the invention.
- a cable several meters long can be provided with a sterile sheath just as easily as a short part of an instrument.
- the advantages achieved by the invention are, in particular, that if the lamp fails, the lighting device initiates the lamp change automatically and is carried out automatically. This ensures that the lamp change causes only a minimal interruption, for example an operation. Since no manual intervention is required, it is impossible for a sterile person to come into contact with the non-sterile part of the lighting device. -13-
- the replaced lamp shines after a short time with optimum efficiency and with its final color temperature.
- FIG. 4 Schematic representation of the transducer with a tubular cover.
- Fig. 5 schematic, three-dimensional representation of the transducer with coating. Way of carrying out the invention
- FIGs 1 and 2 the winding unit for the connecting cable 1 between the television camera 2 and the control unit is shown.
- the cable 1 is wound on the drum 3.
- the motor of the fan 4 which is connected to the drum 3 via a magnetic coupling, serves as the drive.
- a coupling device 5 is attached to the illumination light of the lamps L1 and L2 into the light guide 6.
- the light guide 6 and the electrical connecting lines 7 between the camera 2 and the control electronics 11 are arranged together in the connecting cable 1.
- the lamps L1 and L2 of the lighting device are fixedly mounted on a base plate 1.
- One end of a light guide 6 with a device 5 for coupling the light into the light guide is attached to the rotatable drum 3.
- a rotary device 4 exerts a torque on the drum 3 about its axis of rotation.
- the control 11 switches off the magnetic field of the electromagnet, so that the drum 3 is set into a rotary movement by the torque acting on it.
- the control then causes a magnetic field in the electromagnet again, but with Reverse polarity is built up, so that the rotation of the rotatable body is stopped as soon as the permanent magnet 12 faces the electromagnet.
- the light guide 6 with the coupling device 5 is then positioned by the lamp L2. The illuminating light is guided to a desired location via the light guide 6.
- the television camera 2 is removed from the control unit while the cable 1 is being unwound.
- the locking mechanism 10 prevents the drum 3 from being rotated further in the unwinding direction.
- the power supply for the control unit and the lighting device is switched on.
- FIGS. 3A and 3B The circuit of the electronic control 11 is shown in FIGS. 3A and 3B.
- FIG. 3A shows the initial situation in which the lamp L1 is operated and the lamp L2 serves as a replacement lamp.
- Ll and L2 are low-voltage lamps for operation at 12 V and have a power of 75 W.
- the coil of the electromagnet EM has an inductance of 4 mH and a DC resistance of 0.24 Ohm.
- the lamp L1 and the coil EM are connected in series. Through the series connection, the coil EM dampens the peaks of the inrush current, which increases the life of the lamp Ll.
- the lamp L2 is connected in parallel to the coil EM and has a DC resistance approximately 10 times higher than the coil EM. As a result, a small current flows through the non-operated lamp, which is sufficient to preheat the lamp filament.
- the supply voltage is + 13.5 V.
- the voltage applied to the Zener diode Z is below the breakdown voltage of the Zener diode so that no current flows through the diode. As a result, no base current flows through the transistor T, which is why the collector-emitter circuit of the transistor blocks.
- the Schaiterweehsei arrangement is shown in Fig. 3B. Due to the automatic switchover of the switch S1, the lamp L2 and the coil of the electromagnet EM are now connected in series. The current flow through the coil EM takes place in the opposite direction, so that a pole reversal of the electromagnet takes place. The lamp L1 now lies parallel to the coil EM and takes on the function of the replacement lamp after replacement. With the help of switch S2, a control lamp is switched on, which indicates that a lamp change has taken place.
- FIG. 4 shows the pickup 15 with the tubular cover 16, which enables the television camera 2 and the connecting cable 1 to be pulled over with one hand.
- the device shown in FIGS. 4 and 5 consists of the tubular cover 16, which is slipped over the receiver 15 in the shrunk state.
- the sensor 15 is a hollow body open on two sides, with a rectangular cross section. It is firmly connected to the base plate 18.
- the coating 16 is fixed with an adhesive strip 17 on the transducer.
- the adhesive strip 17 is connected to the base plate 18 at both ends.
- the device is covered with a protective coating 19.
- raster devices 21 for receiving the television camera 2 to be covered are shown with a cable 1.
- the television camera is provided with raster devices 20.
- the television camera with raster devices is only shown schematically.
- the camera 2 is inserted into the sensor 15 through the opening 14 until the raster devices 20 snap into the raster devices 21 provided on the sensor 15. This fixes the TV camera. This insertion can be done by a non-sterile person.
- the protective cover 19 is opened by a sterile person and the adhesive strip 17 is cut through.
- the television camera 2 is gripped so that the narrowing end 23 of the cover comes to rest between the hand of the operating personnel and the non-sterilized television camera.
- the coupling element 23 of the television camera can be connected to the coupling element, for example of an endoscope eyepiece.
- the television camera 2 and the camera cable 1 are automatically covered with the sterile, tubular cover 16.
- the tubular cover 16 is gradually removed by the receiver 15.
- the receiver has finger depressions 24, which are shown in FIG. 5.
- FIG. 5 shows a situation in which the camera 2 has already been removed from the sensor 15.
- the tubular cover 16 is partially removed from the pickup 15 and envelops the camera 2 and the cable 9.
- a repair adhesive strip 25 is attached to the tubular cover 16, which enables the operating personnel to detect possible cracks in the cover, for example due to improper use Handling arose, to be repaired without the part to be coated having to be provided with a new coating.
- the sensor is fastened to the control unit with the aid of the base plate 18.
Abstract
Description
Claims
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3920508A DE3920508A1 (en) | 1989-06-22 | 1989-06-22 | Miniature TV camera and sheath for sterile area |
DEP3920513.4 | 1989-06-22 | ||
DEP3920494.4 | 1989-06-22 | ||
DE3920513A DE3920513C2 (en) | 1989-06-22 | 1989-06-22 | TV camera system for use in the sterile field |
DE3920494A DE3920494A1 (en) | 1989-06-22 | 1989-06-22 | Illumination with mains adaptor for optical system - has two lamps on rotary body, with positioner for each lamp and rotary drive |
DEP3920508.8 | 1989-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990015569A1 true WO1990015569A1 (en) | 1990-12-27 |
Family
ID=27199767
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1990/000475 WO1990015569A1 (en) | 1989-06-22 | 1990-06-22 | Television camera system for use in sterile conditions |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0429622A1 (en) |
WO (1) | WO1990015569A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5587736A (en) * | 1993-02-16 | 1996-12-24 | Envision Medical Corporation | Sterilizable CCD video camera |
US5971916A (en) * | 1995-12-27 | 1999-10-26 | Koren; Arie | Video camera cover |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3821496A (en) * | 1972-03-09 | 1974-06-28 | Troy Malone De | Electrical conductor adjusting means for medical diagnostic equipment |
US4408692A (en) * | 1982-04-12 | 1983-10-11 | The Kendall Company | Sterile cover for instrument |
US4593699A (en) * | 1983-06-13 | 1986-06-10 | Poncy Richard P | Sterile cover for intraoperative ultrasonic diagnostic devices and method and kit for providing same |
DE8711189U1 (en) * | 1987-08-17 | 1987-10-22 | Lemke Gmbh, 8038 Groebenzell, De | |
US4878485A (en) * | 1989-02-03 | 1989-11-07 | Adair Edwin Lloyd | Rigid video endoscope with heat sterilizable sheath |
-
1990
- 1990-06-22 WO PCT/DE1990/000475 patent/WO1990015569A1/en not_active Application Discontinuation
- 1990-06-22 EP EP90909629A patent/EP0429622A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3821496A (en) * | 1972-03-09 | 1974-06-28 | Troy Malone De | Electrical conductor adjusting means for medical diagnostic equipment |
US4408692A (en) * | 1982-04-12 | 1983-10-11 | The Kendall Company | Sterile cover for instrument |
US4593699A (en) * | 1983-06-13 | 1986-06-10 | Poncy Richard P | Sterile cover for intraoperative ultrasonic diagnostic devices and method and kit for providing same |
DE8711189U1 (en) * | 1987-08-17 | 1987-10-22 | Lemke Gmbh, 8038 Groebenzell, De | |
US4878485A (en) * | 1989-02-03 | 1989-11-07 | Adair Edwin Lloyd | Rigid video endoscope with heat sterilizable sheath |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5587736A (en) * | 1993-02-16 | 1996-12-24 | Envision Medical Corporation | Sterilizable CCD video camera |
US5971916A (en) * | 1995-12-27 | 1999-10-26 | Koren; Arie | Video camera cover |
Also Published As
Publication number | Publication date |
---|---|
EP0429622A1 (en) | 1991-06-05 |
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