Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/064—Surgical staples, i.e. penetrating the tissue
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/064—Surgical staples, i.e. penetrating the tissue
  • A61B17/0644—Surgical staples, i.e. penetrating the tissue penetrating the tissue, deformable to closed position
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B2017/00831—Material properties
  • A61B2017/00867—Material properties shape memory effect
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
  • A61F2002/3006—Properties of materials and coating materials
  • A61F2002/30092—Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
  • A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol

Definitions

• the present invention relates to a device for heating and closing heat-shrinkable memory clips used in surgery
• hot staples which are open at room temperature for their installation and require the addition of a quantity of heat to close and thus maintain the tissue.
• one of the objects of the invention is to provide a device which can be used to close all types of staples, whether they are bipod or quadnpod monocortical or bicortical staples and whatever their cross-section.
• Another object of the invention is to equip the device with an effective and reliable safety system to prevent accidental bone necrosis due to heat.
• Another object of the invention is to design an apparatus the heating cord of which is stenlisable in an autoclave or disinfectable in a bath
• the invention which consists of a device for heating and closing heat-shrinkable memory staples used in surgery, device comprising a housing enclosing an electronic power circuit and controlling a power supply cord
• the device further comprises a stenlisable assembly in the form of a connecting cord terminated at one end by a plug-in plug on the outlet of the electronic circuit and at its other end by a sleeve carrying the two heating electrodes and a control switch in that all the elements composing the stenlisable assembly support the passage in autoclave
• the sténbilisable assembly is totally waterproof
• the control switch is a switch with sensitive contacts
• the electronic circuit essentially consists of a current supply block, a control block and an adjustment block making it possible to deliver several predetermined quantities of heat each corresponding to a given size of staple
• the adjustment block is calculated so that the quantity of heat delivered to a clip does not generate in it a temperature exceeding a maximum value, for example 55 °
• the electronic circuit further includes an automatic circuit breaker block cutting the heating current after a predetermined maximum time, for example 5 seconds. Also for security purposes, the electronic circuit further comprises an audible signaling unit emitting a first audible signal during the heating time and a second audible signal, different from the first if the maximum heating time is exceeded.
• the device according to the invention essentially consists of a box (1) enclosing an electronic power and control circuit, a mains supply cord (2), an assembly sterilizable (3) formed of a connecting cord (4), terminated at one end by a plug (5) pluggable into an outlet (14) of the electronic circuit and at its other end by a sleeve (6) carrying the two electrodes heater (7) of the clip and a control switch (8).
• the front face of the box (1) ( Figure 5) is equipped with a main switch (9), a fault indicator light (10), a power-on signal (11), a button (12) potentiometer for adjusting the amount of heat, an indicator (13) for heating the electrodes (7), and an output plug (14) into which the sterilizable assembly (3) is connected .
• the electronic circuit consists of:
• TR ⁇ It includes two transformers TR ⁇ and TR2, the primaries of which are connected to the network.
• is a plate transformer resistant to short circuits, the secondary of which supplies a 12V voltage supplying the control block C, the circuit breaker block D, and the signaling block E.
• the transformer TR2 is a toroidal transformer with screen effect, the secondary of which delivers a current of 20 A at 4V and is used to supply the heating electrodes (7).
• the transformers are energized by action on the main switch SW3 of FIG. 3, itself controlled by the button (9) (FIG. 1).
• the transformers fulfill, in addition to their power supply function, a safety function isolating the patients and the sector. - an adjustment block B
• the phase attack of the power supply is connected to the primary of the transformer TR2 and consists of a tnac TH1, a diac TH2 and a phase shifting circuit R11 C 10
• the triac TH1 switches from 0 to the maximum value, at each alternating current in a very short time
• the blocking time is adjusted by the diac TH2 and the potentiometer Ri 3 operated by the button (12)
• the button (12) is calibrated from 1 to 10, each graduation corresponding to a quantity of current predetermined for a given staple size
• Positions 1 to 5 are used for a range of monocortical and bicortical staples of different dimensions comprising from 0.8 g to 1.7 g of alloy and positions 6 to 10 for a range of epiphyseal staples comprising up to 2.8 g of alloy
• Heating of the clip must be triggered by the control switch (8) which drives the relay K2 and the contact l 2 1 sets the capacity C7 to zero volts At the same time, the contact l 2 2 m and l '' clock U3 at + 12V.
• this block makes it possible to automatically cut the heating beyond a predetermined duration, thus limiting the quantity of heat delivered to the clip to avoid any risk of necrosis even if for example the surgeon forgets to cut the '' switch (8)
• the clock U3 is the main element of the short-circuit block D
• the times are set from 0 to 17s by the counter and then adjusted by the adjuster R1 7 A positive voltage is applied to the clock input so when stopped, the output (S3) of the clock has a potential and the relay K 3 has fallen
• Relay contact l ⁇ 2 1 sends the time sequence.
• is attracted and falls back when the determined time has elapsed.
• a warning light (11) comes on to signal that the power is on as soon as the SW 3 contacts are closed.
• An indicator light (13) at L.E.D. (light-emitting diode) D6 and an acoustic signal LAi indicate the operating state.
• the indicator light (13) comes on when the control switch (8) is closed.
• a voltage is established on the relay contact k2.2 of the modulator U2- This is activated and induces modulation pulses in the sound signal LAi.
• the modulation pulses are sent by gates U4 to the base of a transistor Q2 which is brought to O volt by intervals. If the control switch (8) is kept pressed after the time has elapsed, the indicator (13) remains on and the audible signal emits a continuous sound.
• the electronic circuit also includes other components, the assembly of which does not present any difficulties for those skilled in the art.
• Figure 4 shows, seen in section, the sleeve (6) electrode holder.
• the sleeve (6) has for example, but not limited to, a hollow cylindrical shape, but any other ergonomic shape facilitating handling by the surgeon may be suitable.
• Two conductive wires (15,16) are connected to two contact zones (8a, 8b) of a touch switch (8) connected to two heating electrodes (7a, 7b) held parallel to the end of the sleeve (6 ) and conventionally insulated by an insulating sleeve (17).
• a central conductor (18) provides the grounding.
• connection cord (4), sleeve (6) and plug (5) is made of sterilizable materials in an autoclave supporting up to 134 ° C. It also includes a seal (19) at the connection (sleeve-cord) to also allow sterilization by immersion at the user's choice.
• a reinforcement (20) at the outlet of the cord prevents bending and protects the conductive wires (15, 16, 18).
• the surgeon proceeds as described below: - preparation and positioning of bone fragments,
• the audible signal is then intermittent.
• the current is interrupted by the surgeon as soon as the clip is closed or, failing this, after five seconds thanks to the automatic circuit breaker D
• the sound signal is then continuous and warns the surgeon
• the 15 mm spacing of the electrodes allows, in a single application, to heat the dorsal part of small and medium staples, for larger staples, we will heat first one end of the dorsal part, then the other, which has the effect of successively bending the branches,
• the invention also relates to heat-shrinkable memory clips used in surgery, designed to be closed by the heating device described above. , and comprising a quantity of Nickel-Titanium alloy which can vary from 0.8 ga 2.8 g

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Surgery (AREA)
• Heart & Thoracic Surgery (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Surgical Instruments (AREA)
• Apparatus For Disinfection Or Sterilisation (AREA)

Applications Claiming Priority (5)

Publications (1)

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ID=26234333

Family Applications (1)

Country Status (3)

Families Citing this family (19)

Family Cites Families (10)

• 1999
  • 1999-05-14 EP EP99918067A patent/EP1003421A1/de not_active Withdrawn
  • 1999-05-14 WO PCT/FR1999/001150 patent/WO1999059478A1/fr not_active Application Discontinuation
  • 1999-05-14 US US09/462,862 patent/US6268589B1/en not_active Expired - Fee Related
• 2001
  • 2001-03-29 US US09/820,411 patent/US6323461B2/en not_active Expired - Lifetime

Non-Patent Citations (1)

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