CN105455904B

CN105455904B - Recognition circuit of medical operation electrode

Info

Publication number: CN105455904B
Application number: CN201511005371.XA
Authority: CN
Inventors: 林敏�
Original assignee: SCANMED (CHINA) Ltd
Current assignee: SCANMED (CHINA) Ltd
Priority date: 2015-12-25
Filing date: 2015-12-25
Publication date: 2020-03-24
Anticipated expiration: 2035-12-25
Also published as: CN105455904A

Abstract

The invention provides a recognition circuit of a medical operation electrode, which comprises: one-wire bus with two-wire port "

"memory chip, electrode connector and system host; the system host comprises a high-frequency power generator and an isolation interface adapting circuit which are in signal connection; the electrode connector comprises a plug and a socket; the socket is an output socket of the high-frequency power generator, two ports of the memory chip are respectively connected with the plug and the medical operation electrode and used as a recognition device of the medical operation electrode, and the plug is connected into the socket so as to be connected with the isolation interface adapting circuit; the system host reads the data of the memory chip through the isolation interface adapter circuit, identifies the type of the electrode and reads data information. The invention uses circuit isolation method, the specific area in one line bus memory device stores data to mark the type of electrode, the system host can write information into other memory area of the memory device, and manage the state of electrode.

Description

Recognition circuit of medical operation electrode

Technical Field

The invention relates to a method for marking medical instruments by using an electronic circuit, in particular to an isolation circuit and a method for identifying medical operation electrodes and instruments by using a wire bus device.

Background

A bipolar operation electrode is an operation instrument used for a bipolar high-frequency power source to perform electrosurgery treatment on a patient, such as performing operation treatment on prostatic hyperplasia, gynecological diseases, bladder tumor and the like on a male patient. By properly controlling the high-frequency power, the electrode can generate surgical effects such as vaporization cutting or tissue coagulation on the lesion tissue. Surgery is typically performed endoscopically in saline. A high frequency surgical system can be provided with a plurality of different types of electrodes and instruments according to the surgical application.

Each dedicated electrode and instrument has different properties, such as adaptive mode limitation, maximum power limitation, etc., and the probability of error is high when manual input setting operation is performed. So that the surgical electrodes and instruments are generally electronically identified by the high frequency surgical system. Namely, after the electrode is inserted into a high-frequency power source, the system can identify the model of the electrode and simultaneously set the optimized working parameters, the limiting parameters and the like of the electrode of the model.

The prior art uses several identification methods:

a method of capacitive identification. The method uses one or two capacitors to identify the electrodes. The capacitance of each capacitor represents the type of the electrode, the capacitance corresponding to each type has a proper capacity difference with other types, and the identification circuit can accurately identify the type of the electrode and also needs to enable a measurable capacitance section to contain more type identification values. The method has the advantages that the circuit for identifying and reading capacitance is simple, one end of the capacitor is easy to be at a reference potential such as an electrode, and the capacitance is too large due to too many types. The use of two capacitors allows a considerable increase in the number of identifiers, but the electrodes are therefore provided with at least one connecting line and connecting pin. Examples of using this method are: "Gyeus plasma kinetic System" by Jiale Medical Inc. (Gyrus Medical Inc.) and the G400 Work Station (G400 workstation), the former using one capacitor for identification and the latter using two capacitors for identification.

Resistance marking method. The method uses one or more resistors to identify the electrodes. Each section of resistance value interval corresponds to one type, or the combination of a plurality of resistors corresponds to the type of the electrode, and the connection method is that the resistance value interval is in common polarity with the electrode or is insulated with the electrode. The method for reading the resistance value is simple, and if the resistance and the electrode are in common polarity, an electric isolation reading method is needed.

The utility model of the Chinese patent, the patentee: beijing Hengshi Fuji science and technology Co., Ltd, the application numbers are: 201120372589.X discloses a method for identifying and counting surgical electrodes for high-frequency electric surgical equipment, which comprises an identification and counting main module and a radio frequency card, the identification and counting main module is arranged in a high-frequency electric surgical equipment box body, the radio frequency card is arranged on a plug connected with the surgical electrodes, the identification and counting main module comprises a microprocessor, a radio frequency reading and writing module, the signal input and output ends of a clock circuit are respectively connected with corresponding IO ends on the microprocessor, the signal communication transmission end of the microprocessor is connected with the control end of the corresponding control circuit in the high-frequency electric surgical equipment, the antenna insertion end of the radio frequency reading and writing module is connected with an antenna, when the plug of the surgical electrodes is inserted on a socket for the surgical electrodes, the induction working surface of the radio frequency card is opposite to the induction working surface of the antenna. The utility model discloses can discern the operation electrode to count its use number of times, remind medical personnel in time to change the operation electrode that uses transfinite, avoid because of using the hidden danger that unsafe operation electrode brought.

Chinese patent of invention, patentee: guangdong Hehao Industrial and trade Co Ltd, the application number is: 02135013.2 entitled "Circuit identification method for medical Bipolar plasma cutting head". The plasma cutting device is characterized in that one end of the two-port voltage stabilizing device is connected with a medical plasma cutting outer electrode and a cutting head overpass, and a cutting inner electrode is connected with the cutting head connector. The system applies current to the voltage stabilizing device, and the voltage of the voltage stabilizing device can be tested, so that different types of the cutting head are identified by the voltage stabilizing device. The invention has accurate and reliable measuring mark, the measuring precision is not influenced by the damp leakage factor, and the invention can resist the impact of electric pulse. The right of the patent is transferred to Schmei technology Co., Ltd, Juhai city, and the registration effective date is 2011, 05 and 12.

The merits of the four methods are analyzed as follows:

the capacitance identification method is a method which is used more, the types of identifiable types are more, a special capacitance capacity test circuit is needed, and under the actual working condition, the test circuit needs to bear the interference of high-frequency current. The capacitance method can only read the capacitance value, and the system host can not store new information for the capacitance method.

The resistance method is easy to read and has more use, but when the resistance value is larger, the capability of resisting high-frequency current interference is reduced, and a system host cannot store new information for the resistance value.

The identification method of the two-port voltage stabilizing device is accurate and reliable, the identification circuit is simple, but the types of the identification are few, and the system host can not store new information for the identification.

The radio frequency card identification method has the advantages of non-contact, capability of carrying out interactive operation such as counting and the like, and uncertainty in judging whether the electrode is reliably inserted or not as a system because the radio frequency card can be read or stored when being away from the socket by a certain distance. In addition, the radio frequency card needs high-frequency induction power supply and power taking, and system electromagnetic interference can be increased.

Disclosure of Invention

In view of the background, the present invention is to provide a new identification method, which combines the advantages of the above methods and avoids the disadvantages.

The purpose of the invention is realized by the following technical scheme:

an identification circuit for a medical procedure electrode, comprising: the identification circuit includes: one-wire bus with two-wire port

The memory chip, the electrode connector and the system host; the system host comprises a high-frequency power generator and an isolation interface adapting circuit which are in signal connection; the electrode connector comprises a plug and a socket; the socket is an output socket of a high-frequency power generator, two ports of the memory chip are respectively connected with a plug of the electrode connector and the medical operation electrode and used as an identification device of the medical operation electrode, and the plug is connected into the socket so as to be connected with the isolation interface adapting circuit; and the system host reads the data of the memory chip through the isolation interface adapting circuit so as to identify the type of the electrode and read data information.

The medical operation electrode is a bipolar electrode, and two output lines of the medical operation electrode are isolated to the ground.

The IO level of the memory chip is connected with the loop pole of the medical operation electrode, and the ground loop pole of the memory chip is connected with the system host through the electrode connector.

The memory chip is arranged in the electrode connector and is in circuit connection with the electrode connector: the memory chip is connected with two of the three electrode plug pins of the electrode connector nearby, and the electrode connector is connected with the medical operation electrode through a cable; the socket is installed on the front panel of the system host and is connected with a high-frequency power generator and an isolation interface adapting circuit in the system host.

The isolation interface adapter circuit may be an ADUM series DCDC and bus adapter chip (i.e., utilizing) from ADI (analog devices) corporation

Of the technologyA digital isolator); the circuit can also be formed by data isolator chips with the same function of other companies.

The isolation interface is suitable for a distribution circuit, ADUM6000(U4) is used as a DCDC converter, an isolated floating power supply is provided for the memory chip, and the isolation withstand voltage is 5000 VAC; adopts ADUM2250(U5) as application I²And an isolation bus of the C bus is matched with the chip, and the isolation withstand voltage is 5000 VAC.

The IO end of the memory chip is connected with an SDA2 pin of the U5, R1 serving as a pull-up resistor of an IO pole of a line bus memory is connected between VDD output by the U4 and the IO pole of the line bus memory, and D1 serving as a protection diode is connected between VDD output by the U4 and the IO pole of the memory chip; the IO end of the system host is connected with the SDA1 pin of the U5, the R2 which is used as a pull-up resistor of the system host bus IO is connected between the circuit power supply VCC and the SDA1 pin of the U5, and the SDA1 pin of the U5 is grounded through the D2 which is used as a protection diode; capacitors C1 and C2 are respectively connected between VDD output by the U4 and a reference ground GND2 of a power supply end, capacitors C3 and C4 are respectively connected between VCC and a reference ground GND1 of the power supply end, and capacitors C1, C2, C3 and C4 are respectively used for power decoupling on two sides of an isolation circuit.

Compared with the prior art, the invention has the advantages that:

the identification circuit of the invention adopts a data isolation transmission method to realize the electrical isolation of the identification device and the read-write circuit, and the withstand voltage can reach several kilovolts; the high-frequency bipolar electrode for operation is provided with controllable high-frequency energy by a system host, and the electrode is connected with the system host through a connector; the model of the electrode is identified by storing data in a specific area in a one-line bus storage device, and the model and the data information of the electrode can be identified by a method of reading the data of the memory chip through the isolating interface adapter circuit by a system host, so that the state of the electrode can be managed.

Drawings

FIG. 1 is an overall schematic block diagram of a first embodiment of the present invention;

FIG. 2 is a schematic block diagram of an isolated one-line bus interface according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of the electrical connection principle of the embodiment of the present invention;

fig. 4 is a schematic diagram of the circuit connection relationship of the present embodiment.

Detailed Description

The present embodiment provides a recognition circuit of a medical operation electrode, as shown in fig. 1 to 4, which includes: one-wire bus with two-wire port

The system comprises a memory chip, an electrode connector and a system host. The system host comprises a high-frequency power generator and an isolation interface adapting circuit which are in signal connection; the electrode connector comprises an electrode plug and an electrode socket; the electrode socket is an output socket of a high-frequency power generator, two ports of the memory chip are respectively connected with a plug of the electrode connector and the medical operation electrode and used as a recognition device of the medical operation electrode, and the electrode plug is connected into the electrode socket so as to be connected with the isolation interface adapting circuit; and the system host reads the data of the memory chip through the isolation interface adapting circuit so as to identify the type of the electrode and read data information.

The IO pole of the memory chip is connected with the loop pole of the medical operation electrode, and the ground loop pole of the memory chip is connected with the system host through the electrode connector.

Because the memory chip is directly connected with the high-frequency output high-voltage part of the high-frequency power generator, the problem of isolation between the memory chip and the low-voltage part of the system needs to be solved, and bidirectional data transmission is carried out while isolation is carried out, namely the high-frequency power generator carries out reliable data read-write operation on the memory chip.

A line bus memory chip is disposed in the electrode connector, the memory chip is connected with the electrode connector, and the circuit principle is shown in fig. 1 and fig. 2: the electrode socket J1B is an output socket of a high frequency power generator through which high frequency power is output, and a high frequency high voltage output part of the high frequency power generator is connected to both

pins

1 and 2 of the electrode socket J1B; the output end of the high-voltage part of the isolation interface adaptation circuit is connected with a high-frequency output line (pin 2 of the electrode socket J1B) of the high-frequency power generator through a signal line, and the other signal line is communicated with the output end of the high-voltage part of the isolation interface and pin 3 of the electrode socket J1B. The electrode plug J1A is a connector for connecting the electrode with the high-frequency power generator host, the pins 1 and 2 (marked as 22 and 23 in figure 2) of the electrode plug J1A are respectively connected with the

pins

1 and 2 of the electrode plug J1A in the vicinity of the wire bus memory chip (marked as 1 in figure 2), so as to reduce the influence of external interference on the read-write operation of the chip, and the

pins

1 and 2 of the electrode head are respectively connected with the

pins

1 and 2 of the electrode plug J1A through cables (marked as 21 in figure 2). The electrode plug J1A is inserted into the electrode socket J1B during operation, and the pins correspond to each other. The electrode socket J1B is mounted on the front panel of the system host and is connected to the internal circuitry of the host.

Fig. 3 is a schematic diagram of a bus line isolation data transmission principle, which indicates that the internal data isolation of the isolation chip of the bus line adopts high-frequency transformer isolation transmission, i.e., the internal topology of the admm series chip, and the isolation data transmission chip of this type has excellent data transmission performance. U4 is a DCDC converter, an alternative model being ADUM 6000. U5 is an isolated bus transfer chip, an alternative model is ADUM 2250. The isolated output power VDD of U4 is connected to U5; GND1 is the ground reference for the power supply terminals, and VCC is typically +5V relative to GND 1. SDA1 pin of U5 is connected with IO port of a host MCU (Microcontroller Unit). GND2 is the ground reference of the electrode terminal, i.e., "ground return", and VDD is typically +3.3V relative to GND 2. The SDA2 is connected with the IO port of the memory chip.

Fig. 4 is a schematic diagram of the circuit connection relationship of the present embodiment. In this embodiment, the isolation interface is adapted to use admum 6000(U4) as a DCDC converter to provide an isolated floating power supply for the memory chip (fig. 4, labeled as 1), and the isolation withstand voltage is 5000 VAC; adopts ADUM2250(U5) as application I²And an isolation bus of the C bus is matched with the chip, and the isolation withstand voltage is 5000 VAC. The one-wire bus memory coreThe IO end of the chip is connected with an SDA2 pin of the U5, R1 is a line bus IO pull-up resistor, and D1 is a protection diode; the IO end of the system MCU is connected with an SDA1 pin of U5, R2 is a system host bus IO pull-up resistor, and D2 is a protection diode. Capacitors such as C1, C2, C3 and C4 are respectively used for decoupling power supplies at two sides of the isolation circuit, and the electromagnetic compatibility performance can be improved by reasonably arranging the positions of the capacitors. Because the data port of the one-line bus memory chip has only one path, the data can be transmitted in two directions only by using the SDA1 transmission link of ADUM2250 (U5); the SCL1 transmission link is not used, and two sides are respectively connected with R3 and R4 pull-up resistors.

It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An identification circuit for a medical procedure electrode, comprising:

the identification circuit includes: one-wire bus with two-wire port

The memory chip, the electrode connector and the system host; the system host comprises a high-frequency power generator and an isolation interface adapting circuit which are in signal connection; the electrode connector comprises a plug and a socket; the socket is an output socket of a high-frequency power generator, two ports of the memory chip are respectively connected with a plug of the electrode connector and the medical operation electrode and used as an identification device of the medical operation electrode, and the plug is connected into the socket so as to be connected with the isolation interface adapting circuit; the system host reads the data of the memory chip through the isolation interface adapting circuit so as to identify the type of the electrode and read data information;

the IO electrode of the memory chip is connected with the loop electrode of the medical operation electrode, and the ground loop electrode of the memory chip is connected with the system host through the electrode connector;

the memory chip is arranged in the electrode connector and is in circuit connection with the electrode connector: the output end of the high-voltage part of the isolation interface adaptation circuit is connected with a high-frequency output line of a high-frequency power generator, namely a 2-pin circuit of the socket, meanwhile, the output end of the high-voltage part of the isolation interface is connected with a 3-pin circuit of the socket, and the high-frequency output line of the high-frequency power generator is simultaneously output to the 2-pin of the socket; the 1 pin and the 2 pin of the memory chip are respectively connected with the 3 pins and the 2 pins of the three electrode plug pins of the electrode connector nearby, and the 1 pin and the 2 pins of the three electrode plug pins of the electrode connector are respectively connected with the 1 pin and the 2 pins of the medical operation electrode through cables; the plug is inserted into the socket during working, and the pins correspond to one another;

the medical operation electrode is a bipolar electrode, and two output lines of the medical operation electrode are isolated to the ground;

the isolation interface adaptation circuit consists of an ADUM series DCDC converter and a bus adaptation chip of ADI company; the isolation interface is suitable for a distribution circuit, ADUM6000(U4) is used as a DCDC converter, an isolated floating power supply is provided for the memory chip, and the isolation withstand voltage is 5000 VAC; ADUM2250(U5) is adopted as an isolation bus adaptive chip applying an I2C bus, and the isolation withstand voltage is 5000 VAC;

the IO terminal of the memory chip is connected to SDA2 pin of the ADUM2250(U5), R1 as a pull-up resistor of the IO pole of a line bus memory is connected between VDD output from the ADUM6000(U4) and the IO pole of the line bus memory, and D1 as a protection diode is connected between VDD output from the ADUM6000(U4) and the IO pole of the memory chip; the IO end of the system host is connected with an SDA1 pin of the ADUM2250(U5), an R2 which is a pull-up resistor of a system host bus IO is connected between a circuit power supply VCC and an SDA1 pin of the ADUM2250(U5), and an SDA1 pin of the ADUM2250(U5) is grounded through a D2 which is a protection diode; capacitors C1 and C2 are respectively connected between VDD outputted by the ADUM6000(U4) and a reference ground GND2 of a power supply terminal, capacitors C3 and C4 are respectively connected between a circuit power supply VCC and a reference ground GND1 of the power supply terminal, and capacitors C1, C2, C3 and C4 are respectively used for isolating power decoupling on two sides of the circuit.