MEDICAL SYSTEM, MEDIA AND/OR ENERGY SOURCE, AND TROCAR

Abstract

A medical system including: a trocar configured to provide an artificial access to a body cavity of a patient; a medical instrument configured to be inserted through the trocar and into the body cavity of the patient for performing a medical function in the body cavity of the patient; and a controller configured to: determine whether the medical instrument is inserted into the trocar; and enable the performing of the medical function by the medical instrument only if the medical instrument is determined to be inserted into the trocar.

Claims

1. A medical system comprising: a trocar configured to provide an artificial access to a body cavity of a patient; a medical instrument configured to be inserted through the trocar and into the body cavity of the patient for performing a medical function in the body cavity of the patient; and a controller configured to: determine whether the medical instrument is inserted into the trocar; and enable the performing of the medical function by the medical instrument only if the medical instrument is determined to be inserted into the trocar.

2. The medical system according to claim 1, further comprising one or more of a media source and an energy source configured to provide media and energy, respectively, for the performing of the medical function; wherein the controller is configured to enable one or more of the media source and the energy source only when the medical instrument is determined to be inserted into the trocar.

3. The medical system according to claim 2, wherein the medical instrument is an endoscope.

4. The medical system according to claim 3, wherein the media source is configured to provide flushing fluid.

5. The medical system according to claim 3, wherein the energy source comprises a light source.

6. The medical system according to claim 5, wherein the light source comprises a laser light source.

7. The medical system according to claim 3, wherein the endoscope comprises a shaft with a conductive surface, and the trocar has at least one electrical contact configured to come into contact with the shaft of the endoscope when the shaft is inserted into the trocar.

8. The medical system according to claim 7, wherein the at least one electrical contract comprises two electrical contacts which are interconnected by the shaft of the endoscope when the shaft is inserted into the trocar.

9. The medical system according to claim 7, wherein the at least one electrical contact is part of a seal of the trocar.

10. The medical system according to claim 9, wherein the part of the seal is a sealing element made of an electrically conductive elastic polymer.

11. The medical system according to claim 3, wherein the endoscope comprises a shaft made of a magnetic material, and that the trocar comprises at least one coil whose inductance is changed when the shaft is inserted into the trocar.

12. The medical system according to claim 3, wherein endoscope comprises a shaft and the trocar comprises a capacitor whose capacitance is changed when the shaft is inserted into the trocar.

13. The medical system according to claim 3, wherein endoscope comprises a shaft and the trocar comprises a tactile switch which is actuated when the shaft is inserted into the trocar.

14. The medical system according to claim 1, wherein the controller comprises a circuit integrated in the trocar.

15. The medical system according to claim 1, wherein the controller is configured to provide one of a wireless or wired enabling signal when the medical instrument is determined to be inserted into the trocar.

16. A trocar for use with a medical instrument, the trocar comprising: a controller configured to: determine whether the medical instrument is inserted into the trocar; and enable performing of a medical function by the medical instrument only if the medical instrument is determined to be inserted into the trocar.

17. The trocar according to claim 16, wherein the medical instrument comprises a shaft with a conductive surface, and the trocar has at least one electrical contact configured to come into contact with the shaft of the medical instrument when the shaft is inserted into the trocar.

18. The trocar according to claim 17, wherein the at least one electrical contract comprises two electrical contacts which are interconnected by the shaft of the medical instrument when the shaft is inserted into the trocar.

19. The trocar according to claim 17, wherein the at least one electrical contact is part of a seal of the trocar.

20. The trocar according to claim 19, wherein the part of the seal is a sealing element made of an electrically conductive elastic polymer.

21. The trocar according to claim 16, wherein the medical instrument comprises a shaft made of a magnetic material, and that the trocar comprises at least one coil whose inductance is changed when the shaft is inserted into the trocar.

22. The trocar according to claim 16, wherein medical instrument comprises a shaft and the trocar comprises a capacitor whose capacitance is changed when the shaft is inserted into the trocar.

23. The trocar according to claim 16, wherein medical instrument comprises a shaft and the trocar comprises a tactile switch which is actuated when the shaft is inserted into the trocar.

24. The trocar according to claim 16, wherein the controller comprises a circuit integrated in the trocar.

25. The trocar according to claim 16, wherein the controller is configured to provide one of a wireless or wired enabling signal when the medical instrument is determined to be inserted into the trocar.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The embodiments will be explained in more detail below with reference to some exemplary drawings. In this context, the illustrated examples of embodiments are merely intended to contribute to a better understanding of the invention without limiting it.

[0028] The figures show:

[0029] FIG. 1 illustrates a medical system,

[0030] FIG. 2 illustrates a trocar,

[0031] FIG. 3 illustrates another trocar, and

[0032] FIG. 4 illustrates still another trocar.

DETAILED DESCRIPTION

[0033] FIG. 1 shows a medical system 1. The medical system 1 comprises a medical instrument in the form of an endoscope 2, and a trocar 3.

[0034] The endoscope 2 has a main body 10 and an elongated shaft 11. The shaft 11 and the main body 10 can be made of a biocompatible metallic material, for example medical grade steel.

[0035] The trocar 3 has a trocar head 15 and a cannula 16, which may be made of a biocompatible plastic such as PEEK, for example.

[0036] The medical system 1 is used in minimally invasive surgical procedures to provide an image of the surgical site. For this purpose, the trocar 3 is inserted through an incision into a body cavity (not shown) under treatment or examination, with the trocar head 15 remaining outside the patient where it can be fixed. The shaft 11 of the endoscope 2 is then inserted through the trocar 3 into the body cavity.

[0037] To enable an operative procedure in the body cavity, it is expanded with a gas, for example CO.sub.2. To prevent the gas from escaping through the trocar 3, the trocar is equipped with seals 17, 18. Herein, the seal 17 is configured as a closure seal, which completely closes the trocar 3 when no instrument is inserted. The seal 18 can be a lip seal, which contacts the shaft of the instrument when it is inserted. The seals 17, 18 are made of a biocompatible elastic polymer such as silicone.

[0038] The medical system 1 further comprises an energy source in the form of a light source 20. The light source 20 is connected to the endoscope 2 via an optical fiber 21 cable. In operation, light from the light source 20 is transmitted into the endoscope via the optical fiber cable 21, where it is transmitted via optical fibers, not shown, to a distal end of the shaft 11. At the distal end of the shaft 11, the light is emitted to illuminate a field of view of the endoscope 2.

[0039] The light source 20 produces intense white light that may damage an unprotected eye. This is particularly true if the light source includes a laser light source, such as described for example in DE102016124730A1. Laser light sources are also used to generate excitation light in fluorescence examinations.

[0040] The medical system 1 further comprises a media source in the form of a pump 30 for flushing fluid. The pump 30 is connected to the endoscope 2 via a flushing tube. Flushing fluid is delivered by the pump 30 through the flushing tube into the endoscope 2, where it is delivered in the direction of an optics, not shown, to clean the optics of soiling during the procedure.

[0041] Flushing fluid from the endoscope 3 can cause fouling in an operating room, and furthermore, flushing fluid can cause a risk for accidents, such as slipping.

[0042] The medical system comprises a controller, such as the circuits described below, that prevents the delivery of energy and/or flushing fluid by the light source 20 or the pump 30 as long as the endoscope 2 is not inserted into the trocar 3.

[0043] In the embodiment shown in FIG. 1, the seals 17, 18 are made of an electrically conductive polymer. For this purpose, the polymer of the seals 17, 18 may be mixed with a metal powder or provided with a suitable coating. The seals 17, 18 are connected to a circuit 50.

[0044] When the endoscope 2 is inserted into the trocar 3, an electrical interconnection is established between the seals 17, 18 by the metallic shaft 11. This is detected by the circuit 50. The circuit 50 then generates an enabling signal, which is provided at an interface 51. The interface 51 may, for example, be a connector or a wireless interface. As a wireless interface, for example, a Bluetooth or WLAN interface may be considered. In the case of a connector, the enabling signal may be transmitted via a signal line 52.

[0045] The light source 20 and the pump 30 are configured to receive the enabling signal from the circuit 50, and to provide light or flushing fluid only when the enabling signal is present. In this way, the light source 20 or the pump 30 are safely prevented from being activated when the endoscope 2 is not inserted through the trocar 3 into the body cavity under examination or treatment. Likewise, if the endoscope 2 is retracted from the trocar 3 during the procedure, for example in order to clean it more thoroughly, this is detected by the circuit 50, and the light source 20 and/or the pump 30 can be safely deactivated before an accident risk occurs.

[0046] If the light source 20 is configured to provide both white light and laser light, white light can be provided independently of the enabling signal, while laser light is provided only when the enabling signal is present.

[0047] In the medical system 1 shown, the trocar 3 includes two electrical contacts. In principle, the insertion of the endoscope 2 into the trocar 3 may also be detected with a single contact. For this purpose, it can be determined whether an electric circuit is closed via the signal line 51 and the optical fiber cable 21 or the flushing tube 31 and the shaft 11 of the endoscope 2. For this purpose, electrical conductors may also be provided in the optical fiber cable 21 and/or the flushing tube 31.

[0048] FIG. 2 shows a trocar 60 which can be used as an alternative to the trocar 3 in the medical system 1.

[0049] The trocar 60 again comprises a trocar head 61 and a cannula 62, which is closed by seals 63, 64. In contrast to the seals 17, 18, the seals 63, 64 are not or not necessarily electrically conductive.

[0050] In the trocar head 61, a coil 65 is arranged in such a way that the endoscope 2 not shown in FIG. 2 has to be guided through the coil 65 when it is inserted into the trocar 60. In this process, the inductance of the coil 65 changes due to the magnetic, for example, ferromagnetic, behavior of the shaft 11 of the endoscope 2.

[0051] The trocar 60 further comprises a circuit 70 that measures the inductance of the coil 65. When the inductance is changed by the shaft 11, the circuit 70 generates an enabling signal and transmits it through an interface 71. The interface 71 may be similar to interface 51, for example, a connector or a wireless interface.

[0052] In FIG. 3, another trocar 80 is shown which is configured similarly to trocar 60. The trocar 80 includes a capacitor 85 having two capacitor plates 85a, 85b. The capacitor 85 is arranged in such a way that an endoscope not shown in FIG. 3 reaches the vicinity of the capacitor plates 85a, 85b when inserted into the trocar 80, such as between the capacitor plates 85a, 85b. As a result, the capacitance of the capacitor 85 is changed.

[0053] The trocar 80 comprises a circuit 90 that measures the capacitance of the capacitor 85. When the capacitance is changed, the circuit 90 generates an enabling signal and transmits it through an interface 91. The interface 91 may be similar to interface 51, for example, a connector or a wireless interface.

[0054] FIG. 4 shows yet another trocar 100, which is configured similarly to trocars 3, 60, 80 described previously. The trocar 100 comprises a tactile switch 105 which is actuated when an endoscope not shown in FIG. 4 is inserted into the trocar 100. For this purpose, a flap 106 may be arranged in the trocar 100, which is pivoted in the direction of the arrow 107 by the endoscope and actuates the tactile switch 105. The flap 106 may be biased against the direction of arrow 107 by a spring not shown, so that it moves back to the position shown in FIG. 4 after the endoscope is retracted from the trocar 100.

[0055] The trocar 100 includes a circuit 110 that evaluates the switch position of the tactile switch 105. When the tactile switch 105 is actuated, the circuit 110 generates an enabling signal and transmits it through an interface 111. The interface 111 may be similar to interfaces 51, 71, for example, a connector or a wireless interface.

[0056] The trocars 3, 60, 80, 100 may be configured to be reusable. For this purpose, the circuits 50, 70, 90, 110 must be sufficiently protected from damage during a reprocessing procedure. Alternatively, the trocars 3, 60, 80, 100 may be configured for single use. In this case, the circuits 50, 70 may be relatively inexpensive when provided as printed circuits, and need not be protected from the effects of a reprocessing process.

[0057] A simple battery can be provided as the power supply for the circuits 50, 70, 90, 110, for example a button cell. Alternatively, an external power supply not shown is also possible.

[0058] While there has been shown and described what is considered to be preferred embodiments of the invention, it will, of course, be understood that various modifications and changes in form or detail could readily be made without departing from the spirit of the invention. It is therefore intended that the invention be not limited to the exact forms described and illustrated, but should be constructed to cover all modifications that may fall within the scope of the appended claims.