Medical endoscope comprising a consumable instrument having a fluid flow circuit
The invention provides a medical endoscope including a control handle ( 2 ) provided with a control mechanism and that, by means of an attachment system, is temporarily attached to a consumable medical instrument ( 3 ) including: at least one flow circuit for a fluid, a portion of which circuit extends along an insertion tube, the fluid circuit including a connector fitting accessible independently from the handle; an actuation system for actuating the head of the insertion tube, which actuation system is driven by the control mechanism after the handle and the consumable medical instrument have been attached together; in accordance with the invention, the control handle ( 2 ) and the consumable medical instrument ( 3 ) respectively have a first portion and a second portion of a closure device, which portions co-operate with each other in the attached position to close off at least one fluid flow circuit in controlled manner.
1. A medical endoscope including a control handle provided with a control mechanism and that, by means of an attachment system, is temporarily attached to a consumable medical instrument including: at least one flow circuit for a fluid, a portion of which circuit extends along an insertion tube, the fluid circuit including a connector fitting accessible independently from the handle; and an actuation system for actuating the head of the insertion tube, which actuation system is driven by the control mechanism after the handle and the consumable medical instrument have been attached together; said medical endoscope being characterized in that the control handle and the consumable medical instrument, respectively, have a first portion and a second portion of a closure device, which portions co-operate with each other in the attached position to close off at least one fluid flow circuit in a controlled manner;
wherein the first portion is formed by a deformable portion of the flow circuit that is not closed off prior to attachment, between the control handle and the consumable medical instrument; and
the second portion comprises a clamp, acting after attachment and on the deformable portion of the flow circuit in order to close off the flow circuit automatically, and caused to move by a control button for controlling closure of said circuit; wherein the clamp is carried by a slidably mounted pin that projects from the support to form a control button, making it possible to control closure of the circuit, the pin being biased by a spring, making it possible, in the absence of any pressing form of the control button, to place the clamp in a fully closed position in which the clamp fully closes the circuit.
2. A medical endoscope according to claim 1 , characterized in that the first portion and the second portion are carried respectively by the consumable medical instrument and by the handle, one of the portions comprising a closure member, while the other portion comprises a control member for controlling the closure member and co-operating with said closure member after the handle and the consumable medical instrument have been attached together.
3. A medical endoscope according to claim 1 , characterized in that the controlled closure device includes masking means for masking the clamp during the attachment, enabling it to be positioned without deforming the deformable portion, these masking means no longer acting on the clamp after attachment so that the clamp can close off the flow circuit.
4. A medical endoscope according to claim 1 , characterized in that it includes a locking member for locking an attachment between the consumable medical instrument and the handle, which locking member co-operates automatically with a blocking member at the end of a stroke over which the support and the consumable medical instrument are brought together.
5. A medical endoscope according to claim 4 , characterized in that the blocking member is driven by the control button of the clamp in order to unlock the locking member causing the consumable medical instrument and the handle to be detached.
6. A medical endoscope according to claim 4 , characterized in that the actuation system includes at least one pair of pulleys mounted on a common axis.
7. A medical endoscope according to claim 1 , characterized in that the actuation system includes at least one pulley provided with a male or female coupling member designed to co-operate, after attachment, respectively with a female or male coupling member of the control mechanism equipping the handle.
8. A medical endoscope according to claim 7 , characterized in that each male or female coupling member equipping the control handle is provided with a control lever.
9. A medical endoscope according to claim 1 , characterized in that the medical instrument includes a vision system suitable for illuminating and for returning an image from a portion of the insertion tube that is remote from the proximal portion.