TWI661433B - Electronic medical record system based on blockchain and method thereof - Google Patents

Abstract

An electronic medical record system based on a blockchain and a method thereof. An electronic medical record is realized through a smart contract of a blockchain, so that a patient node in the blockchain network can read the medical record data from the blockchain, and then the medical record data Send to the physician node in the blockchain network for display, for medical diagnosis, and then generate medical records by the physician node after medical treatment, and transmit the medical records to the blockchain network through blockchain transactions. The smart contract address generated after receiving the blockchain transaction is transmitted to the patient node to provide the confirmed medical record. When the patient node confirms, it is allowed to add the medical record to the medical record data, improving the technical efficacy of the availability of electronic medical records.

Description

Electronic medical record system and method based on block chain

The invention relates to an electronic medical record system and a method thereof, in particular to an electronic medical record system and a method based on a blockchain.

In recent years, with the popularization and vigorous development of electronic medical records, most medical institutions have electronicized their medical records. However, most of them use a custom format to electronicize their medical records. As a result, the generated electronic medical records cannot be applied to different medical records. Medical institutions.

In view of this, some international standards organizations have implemented international standard formats, and some government units have also implemented national standard standard formats to avoid the incompatibility of electronic medical records established by different medical institutions. However, even if all medical institutions use the standard format, the patient's electronic medical records are still scattered in different medical institutions. For example, if a patient visits a dermatology clinic, an electronic medical record will be generated in this dermatology department. Clinic, when the same patient goes to another hospital for treatment, another electronic medical record is also stored in the hospital. In other words, when a patient seeks a doctor, the doctor cannot obtain the patient's complete historical medical records, and therefore lacks sufficient information to make the best diagnosis. In addition, patients cannot have their own electronic medical records, so they cannot use smart medical devices or medical assistant software that require electronic medical records in their homes. Therefore, the availability of electronic medical records is poor.

In summary, it can be seen that the availability of electronic medical records has been poor for a long time in the prior art, so it is necessary to propose improved technical means to solve this problem.

The invention discloses an electronic medical record system and method based on the blockchain.

First, the present invention discloses a blockchain-based electronic medical record system, which is applied to multiple nodes forming a blockchain network, and each node has a blockchain and the ability to process blockchain transactions. The system includes: Affected nodes and physician nodes. Among them, the patient node is one of the nodes, which includes: an execution module and a confirmation module. The execution module is configured to execute a blockchain medical record smart contract to read the corresponding medical record data according to the medical record data smart contract address stored in the medical record data address array, and to decrypt the patient's private key according to a preset patient private key. The medical record data is transmitted; the confirmation module is used to receive the medical record smart contract address to confirm the medical record, and after the confirmation is correct, the medical record smart contract address is stored in the medical record data address array through the blockchain transaction as One of the medical contract data smart contract addresses.

The doctor node is also one of the nodes, which includes: a medical module, an encryption module, and a transaction module. Among them, the medical module is used to receive the decrypted medical record data from the patient node for display and generate medical records after medical treatment; the encryption module is used to encrypt the medical records to generate encrypted records according to a preset patient public key, And the encrypted record is signed according to the preset doctor's certificate; the transaction module is used to transmit the signed encrypted record to the blockchain network as a blockchain transaction, and to receive the blockchain network to complete the blockchain The smart contract address of the medical record generated after the transaction is transmitted to the patient node.

In addition, the present invention discloses a blockchain-based electronic medical record method, which is applied to a plurality of nodes constituting a blockchain network, and each node has a blockchain and the ability to process blockchain transactions. The steps include: providing A patient node and a physician node, each of which is one of the nodes; the patient node executes a blockchain's medical record smart contract based on the medical record data smart contract address stored in the medical record data address array Read the corresponding medical record data, and decrypt the medical record data according to a preset patient private key for transmission to the physician node; the physician node receives the decrypted medical record data from the patient node for display, and generates a medical record after medical treatment ; The physician node encrypts the medical record according to a preset patient public key to generate an encrypted record, and signs the encrypted record according to a preset physician certificate; the physician node sends the signed encrypted record to the blockchain transaction to The blockchain network and the smart contract address of the medical records generated after the blockchain network completes the blockchain transaction, and The medical record smart contract address is transmitted to the patient node; the patient node receives the medical record smart contract address to confirm the medical record, and after confirmation is correct, the medical record smart contract address is stored in the medical record data address array through blockchain transactions, and As one of the smart contract addresses of the medical record data.

The system and method disclosed in the present invention are as above. The difference from the previous technology is that the present invention implements electronic medical records through the smart contract of the blockchain, so that patient nodes in the blockchain network can read the medical records from the blockchain. Data, and then send the medical record data to the physician nodes in the blockchain network for display, for medical diagnosis, and then generate medical records by the physician nodes after medical treatment, and transmit the medical records through blockchain transactions. To the blockchain network, and receive the smart contract address of the medical record generated after receiving the blockchain transaction to send to the patient node to provide confirmation of the medical record. When the patient node confirms, the medical record is allowed to be added to the medical record data.

Through the above technical means, the present invention can achieve the technical effect of improving the usability of the electronic medical record.

In the following, the embodiments of the present invention will be described in detail with reference to the drawings and examples, so as to fully understand and implement the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects.

Before explaining the blockchain-based electronic medical record system and method disclosed by the present invention, the environment in which the present invention is applied will be described. The present invention is applied to a plurality of nodes constituting a blockchain network, and each node Both have a blockchain and are used to process blockchain transactions (Blockchain Transactions). In practice, these nodes are computer devices with network connection capabilities and connected through a peer-to-peer method, such as: Servers, computer hosts, notebook computers, tablets, etc., are used to execute computer program instructions, such as the blockchain program "Ethereum". In particular, the patient node and the physician node according to the present invention are one of the nodes, wherein the patient node is the node where the patient is located; the physician node is the node where the physician is located.

In addition, the smart contract address and medical record smart contract address of the present invention are the addresses of the smart contract in the blockchain. The difference between the two is that the smart contract corresponding to the former (that is, the smart contract for medical records) has become Part of the patient's electronic medical record; the smart contract corresponding to the latter is required to be confirmed by the patient before being allowed to be added to the patient's electronic medical record. The smart contract refers to a computer program that executes instructions based on established conditions and transmitted information. In actual implementation, the smart contract is implemented through programming languages such as: Solidity, Serpent, LLL, EtherScript, Sidechain, etc. Written, it can contain a variety of different functions, parameter states, etc. Take the blockchain program "Ethereum" as an example. Its smart contract is compiled to obtain a binary code and an application binary interface (ABI). In order to broadcast the smart contract to the blockchain network, wait for the miner to put the smart contract on the blockchain and get the corresponding address. After that, the corresponding smart contract can be executed according to this address, and the state of the smart contract on the blockchain can be changed by different instructions.

The following is a further description of the electronic medical record system based on the blockchain and the method thereof according to the drawings. Please refer to "Figure 1" first, and "Figure 1" is a block diagram of the electronic medical record system based on the blockchain of the present invention. It is applied to multiple nodes 100 that make up the blockchain network 10, and each node 100 has a blockchain and the ability to process blockchain transactions. This system includes: a patient node 110 and a physician node 120. The part of the patient node 110 includes an execution module 111 and a confirmation module 112. The execution module 111 is used to execute the smart contract of the medical records of the blockchain to read the corresponding medical record data according to the smart contract addresses stored in the medical record data address array (Array), and according to the preset The patient's private key decrypts the medical records for transmission. In actual implementation, the patient node 110 has a set of key pairs, that is, the patient's public key and the patient's private key, and the patient's public key is transmitted to the doctor's node 120 or directly posted on the physician node 120 On the blockchain, it is used for physician node 120 to encrypt data, ensuring that the encrypted data can only be decrypted by patient node 110 with patient private key. In addition, in actual implementation, the transmitted medical record data can also be signed by the patient's private key for the physician node 120 to confirm that the received medical record data is indeed transmitted by the patient node 110.

The confirmation module 112 is used to receive the medical record smart contract address from the physician node 120 to confirm the medical record, and after the patient is confirmed to be correct, the medical record smart contract address is stored in the medical record data address array through the blockchain transaction as the One of the medical contract data smart contract addresses. In practice, if the patient confirms that the medical record is wrong, the smart contract address received from the medical record can be ignored. In other words, it is not allowed to store the medical contract smart contract address corresponding to this medical record in the medical record data address array. In this way, this medical record will not become the medical record data in the electronic medical record, because it is only stored in the medical record data address. The address in the array (that is, the smart contract address of the medical record data), the corresponding data will become the medical record data in the electronic medical record.

The part of the doctor node 120 includes a medical module 121, an encryption module 122, and a transaction module 123. The medical module 121 is configured to receive the decrypted medical record data from the patient node 110 for display, and generate a medical record after medical treatment. The medical records may include records after diagnosis, treatment or examination. In addition, as mentioned earlier, the medical record data transmitted by the patient node 110 can also be signed with the patient's private key, so the physician node 120 can decrypt it with the patient's public key to confirm that the received medical record data is indeed It is transmitted by the patient node 110.

The encryption module 122 is configured to encrypt a medical record according to a preset patient public key to generate an encrypted record, and sign the encrypted record according to a preset physician certificate. In practice, the doctor's certificate can be issued by a third-party public credential certification unit (for example: Taiwan Internet Certification Center) and provides a public key query service, so the patient node 110 can verify the signature to ensure that the encrypted record is issued by the corresponding Generated by the physician node 120. In other words, the physician credential can include the physician credential private key and the physician credential public key. The physician node 120 signs the private credential based on the physician credential and provides the physician credential public key to the patient node 110, so that the patient node 110 can Certificate public key to verify signature. In actual implementation, the public key of the doctor's certificate can also be published on the blockchain to provide patient node 110 query.

The transaction module 123 is used to transmit the encrypted record after signing to the blockchain network 10 as a blockchain transaction, and to receive the smart contract address of the medical record generated after the blockchain network 10 completes the blockchain transaction, and The medical record smart contract address is transmitted to the patient node 110. In actual implementation, the encrypted record is transmitted to the blockchain network as a blockchain transaction. 10 A smart contract (ie, a medical record smart contract) is generated on the blockchain, and the corresponding smart record smart contract address is obtained. When the patient node 110 stores the medical record smart contract address in the medical record data address array, the content of the receiving medical record smart contract becomes a part of the medical record data. At this time, the medical contract smart contract address becomes the medical record data smart contract address.

Next, please refer to "Figure 2". "Figure 2" is a flowchart of the method of electronic medical records based on the blockchain of the present invention, which is applied to multiple nodes 100, each node 100 constituting the blockchain network 10. Both have a blockchain and the ability to process blockchain transactions. The steps include: providing a patient node 110 and a physician node 120. The patient node 110 and the physician node 120 are a plurality of each of which constitutes the blockchain network 10. One of the nodes 100 (step 210); the patient node 110 executes the blockchain medical record smart contract to read the corresponding medical record data according to the medical record data smart contract address stored in the medical record data address array, and according to the preset disease The patient's private key decrypts the medical record data for transmission to the physician node 120 (step 220); the physician node 120 receives the decrypted medical record data from the patient node 110 for display, and generates a medical record after medical treatment (step 230) ; The physician node 120 encrypts the medical record according to a preset patient public key to generate an encrypted record, and signs the encrypted record according to a preset physician certificate (step 240); the physician Point 120 sends the signed encrypted record to the blockchain network as a blockchain transaction, and receives the medical record smart contract address generated by the blockchain network after completing the blockchain transaction, and sends the medical record smart contract address Send to the patient node 110 (step 250); the patient node 110 receives the medical record smart contract address to confirm the medical record, and after confirming that it is correct, stores the medical record smart contract address into the medical record data address array through blockchain transactions. As one of the smart contract addresses of the medical record data (step 260). Through the above steps, an electronic medical record can be realized through the smart contract of the blockchain, so that the patient node 110 in the blockchain network 10 can read the medical record data from the blockchain, and then transmit the medical record data to the blockchain. The physician node 120 in the network 10 displays it for medical diagnosis, and then the medical node 120 generates a medical record after medical treatment, and transmits the medical record to the blockchain network 10 through a blockchain transaction. And the smart contract address generated after receiving the blockchain transaction is transmitted to the patient node 110 to provide a confirmed medical record. When the patient node 110 confirms, the medical record is allowed to be added to the medical record data. In this way, patients can keep their own electronic medical records through the blockchain, and the medical record data in the electronic medical records can be applied to medical equipment or medical auxiliary software through the characteristics of blockchain data interconnection.

The following description will be given in an embodiment in conjunction with "Figure 3" to "Figure 5". Please refer to "Figure 3" first. "Figure 3" is a schematic diagram of reading medical record data at a patient node using the present invention . Assume that the patient located at the patient node 110 wants to read the medical record data of the blockchain, and transmits the read medical record data to the physician node 120, which can enter the disease in the medical record address input box 310 through the patient operation window 300. Suffer from his own medical record smart contract address in the blockchain (ie, the medical record data smart contract address), for example: "0xcee285f6eb0a3cf918891117272a7bec686cf996", so that after clicking load component 311, the input address The medical record data is read in the chain and displayed in the medical record data display block 320. In actual implementation, the medical record data read from the blockchain is encrypted with the patient's public key. Therefore, before being displayed in the medical record data display block 320, it will correspond to the patient's public key first. The patient ’s private key is decrypted in order to successfully display the decrypted medical record data in the medical record data display block 320. In this way, you can ensure that other people cannot read the medical record data only by the smart record address of the medical record, and they must have the corresponding patient private key to decrypt it correctly.

Next, if the decrypted medical record data is to be transmitted to the physician node 120. Patients can enter the Uniform Resource Identifier (URI) of the Physician Node 120 through the Physician Node Address Input Box 330 as shown in "Figure 3", for example: "enode: // 82498ed4295f1ce8fd6273f18b201c68c7ae9a76b47d35a7d980d2264d78bd120052fda79ae5c5e5c35e5c35e5c5e5c5c5e5c5e5c5c5e5c5c5c5c5c5c5c5c5c5c5c3c5c5c5c5c5c5c5c5c5c5c5c5c5c5c5c5c5c5c" ", And click the transmitting element 331 with a cursor or touch to transmit. Among them, "82498ed4295f1ce8fd6273f18b201c68c7ae9a76b47d35a7d740d2264d78bd120052fda79ae03a35c17875a55c8e35395146c118fa90b5e25c7bf91d6a5980e4" is the public key of the physician node 120, and "192.168.1.1" is the doctor ’s node 120, and "192.168.1.1"

As shown in "Figure 4", "Figure 4" is a schematic diagram of generating medical records at a physician node by applying the present invention. As mentioned earlier, the decrypted medical record data will be transmitted to the physician node 120. In actual implementation, the physician node 120 displays the received medical record data in the medical record display block 410 in the physician operation window 400. The physician located at the physician node 120 can use the displayed medical record data as a reference for medical diagnosis, and After the medical treatment, enter the relevant records in the medical record block 420 (that is, the physician records the records of documents performed by the medical service) to generate medical records. If you want to re-record due to mistaken mistakes, you can click the editing element 431 to edit. Then, after generating the medical record, click the signature element 432 to first encrypt the medical record according to a preset patient public key to generate an encrypted record, and then sign the encrypted record with a preset physician certificate. For confirmation that the encrypted record is generated by the physician node 120. Finally, you can click the transmission element 433 to send the signed encrypted record to the blockchain network 10 as a blockchain transaction. The blockchain network 10 will process the blockchain transaction and receive the block. The medical record smart contract address generated after the blockchain network 10 completes the blockchain transaction, in order to transmit the medical record smart contract address to the patient node 110, and provide the patient to confirm the corresponding medical record. In actual implementation, when the physician node 120 receives the medical record smart contract address, it can also generate a display window 450 as shown in "Figure 4", which is used to display the medical record smart contract address so that the physician can pass this medical record. The smart contract address queries and confirms the medical records it generates from the blockchain.

As shown in "Figure 5", "Figure 5" is a schematic diagram of confirming a medical record at a patient node using the present invention. In the above example, after the patient node 110 receives the medical record smart contract address transmitted by the physician node 120, it can generate a confirmation window 500 as shown in "Figure 5", which is used to display the medical record smart contract address 510. The medical record corresponding to the medical record smart contract address 510 is displayed in block 520. Assuming that the patient confirms that the medical record is correct, click the confirmation component 531 to store the medical record smart contract address 510 in the medical record data address array of the medical record smart contract through the blockchain transaction as one of the medical record data stored in this array. Smart contract address. In this way, when the medical record smart contract is executed in the future, the medical record data corresponding to the medical record smart contract address 510 can be read from the medical record data address array. Conversely, if the patient confirms that the medical record is incorrect, he can click the dissent element 532 to ignore the medical record smart contract address 510. In this way, the medical record smart contract address 510 will not be added to the medical record data address array, causing it The corresponding medical record cannot be written into the patient's electronic medical record, that is, the medical record corresponding to the medical record smart contract address 510 is in the blockchain, which is equivalent to a piece of data that no one will read.

In summary, it can be seen that the difference between the present invention and the prior art lies in the realization of electronic medical records through the smart contracts of the blockchain, so that patient nodes in the blockchain network can read the medical record data from the blockchain, and then Send medical records to physician nodes in the blockchain network for display, for medical diagnosis, and then generate medical records from physician nodes after medical treatment, and transmit medical records to the block through blockchain transactions. Chain network, and the smart contract address of the medical record generated after receiving the blockchain transaction is transmitted to the patient node to provide the confirmed medical record. After the patient node confirms, the medical record is allowed to be added to the medical record data. It can solve the problems existing in the prior art, and then achieve the technical effect of improving the usability of electronic medical records.

Although the present invention is disclosed in the foregoing embodiments as above, it is not intended to limit the present invention. Any person skilled in similar arts can make some modifications and retouches without departing from the spirit and scope of the present invention. The scope of patent protection shall be determined by the scope of the patent application attached to this specification.

10‧‧‧ Blockchain Network

100‧‧‧node

110‧‧‧patient node

111‧‧‧Execution Module

112‧‧‧ Confirmation Module

120‧‧‧Physician Node

121‧‧‧Medical Module

122‧‧‧Encryption Module

123‧‧‧Transaction Module

300‧‧‧patient operation window

310‧‧‧ Medical Record Address Input Box

311‧‧‧Loading components

320‧‧‧ medical record data display block

330‧‧‧Physician node address input box

331‧‧‧Transmission element

400‧‧‧Physician operation window

410‧‧‧ medical record data display block

420‧‧‧medical record block

431‧‧‧Editing element

432‧‧‧Signature components

433‧‧‧Transmission element

450‧‧‧display window

500‧‧‧Confirmation window

510‧‧‧medical record smart contract address

520‧‧‧Display block

531‧‧‧Confirm component

532‧‧‧Dissent element

Step 210‧‧‧ provides a patient node and a physician node, each of which is one of a plurality of nodes forming a blockchain network

Step 220‧‧‧ The patient node executes a medical record smart contract of the blockchain to read corresponding at least one medical record data according to at least one medical record data smart contract address stored in an array of medical record data address, and according to a preset A patient's private key decrypts the medical record data for transmission to the physician node

Step 230‧‧‧ The physician node receives the decrypted medical record data from the patient node for display, and generates a medical record after medical treatment

Step 240‧‧‧ The physician node encrypts the medical record according to a preset patient public key to generate an encrypted record, and signs the encrypted record according to a preset physician certificate

Step 250‧‧‧ The physician node sends the encrypted record after signing to the blockchain network as a blockchain transaction, and receives a medical record intelligence generated after the blockchain network completes the blockchain transaction The contract address, and transmit the medical record smart contract address to the patient node

Step 260‧‧‧ The patient node receives the medical record smart contract address to confirm the medical record, and after confirmation is correct, the medical record smart contract address is stored in the medical record data address array through a blockchain transaction as One of the medical contract information smart contract addresses

FIG. 1 is a system block diagram of the electronic medical record system based on the blockchain of the present invention. FIG. 2 is a method flowchart of the electronic medical record method based on the blockchain of the present invention. FIG. 3 is a schematic diagram of reading medical record data at a patient node by applying the present invention. FIG. 4 is a schematic diagram of generating medical records at a physician node by applying the present invention. FIG. 5 is a schematic diagram of confirming a medical record at a patient node using the present invention.

Claims (10)

A blockchain-based electronic medical record system is applied to multiple nodes forming a blockchain network. Each node has a blockchain and the ability to process blockchain transactions. The system includes: a patient node The patient node is one of the nodes and includes: an execution module for executing a medical record smart contract of the blockchain to perform at least one medical record data smart contract stored in an array of medical record data addresses The address reads the corresponding at least one medical record data, and decrypts the medical record data for transmission according to a preset patient private key; and a confirmation module for receiving a medical record smart contract address to confirm a medical record And after confirming that there is no error, the medical record smart contract address is stored into the medical record data address array through a blockchain transaction as one of the medical record data smart contract addresses; and a physician node, the physician node is One of the nodes includes: a medical module for receiving the decrypted medical record data from the patient node for display, and Generating the medical record after medical treatment; an encryption module for encrypting the medical record according to a preset public key of a patient to generate an encrypted record, and signing the encrypted record according to a preset physician certificate ; And a transaction module for transmitting the encrypted record after signing to the blockchain network as a blockchain transaction, and receiving the medical record generated after the blockchain network completes the blockchain transaction The smart contract address is transmitted to the patient node. According to the blockchain-based electronic medical record system of the first patent application scope, the patient node has a set of key pairs, the set of key pairs containing the patient's public key and the patient's private key, and The patient public key is transmitted to the physician node in advance. According to the blockchain-based electronic medical record system according to item 1 of the patent application scope, before the execution module transmits the medical record data, the medical record data is encrypted according to the patient's private key to complete The signature of the medical records. According to the blockchain-based electronic medical record system of the first patent application scope, wherein the physician certificate includes a physician certificate private key and a physician certificate public key, the encryption module is signed according to the physician certificate private key and provided The doctor certificate public key enables the patient node to verify the signature based on the doctor certificate public key. According to the blockchain-based electronic medical record system of the first patent application scope, the patient's private key, the patient's public key, and the physician's certificate are generated and issued by a third-party public credential unit, and the disease The patient's public key and a doctor's certificate public key of the doctor's certificate are written into the blockchain for query. A blockchain-based electronic medical record method is applied to multiple nodes forming a blockchain network. Each node has a blockchain and the ability to process blockchain transactions. The steps include: providing a patient Node and a physician node, the patient node and the physician node being one of the nodes, respectively; the patient node executes a medical record smart contract of the blockchain to store at least one of a medical record data address array according to The medical record data smart contract address reads the corresponding at least one medical record data, and decrypts the medical record data according to a preset patient private key to transmit to the physician node; the physician node receives the decrypted said from the patient node The medical record data is displayed, and a medical record is generated after the medical treatment; the physician node encrypts the medical record according to a preset patient public key to generate an encrypted record, and the encrypted record according to a preset physician certificate Signing; the physician node sends the encrypted record after signing to the blockchain network as a blockchain transaction, and receives the blockchain network Into a medical record smart contract address generated after the blockchain transaction, and transmitting the medical record smart contract address to the patient node; and the patient node receives the medical record smart contract address to confirm the medical record, and After the confirmation is correct, the medical record smart contract address is stored in the medical record data address array through a blockchain transaction as one of the medical record data smart contract addresses. The blockchain-based electronic medical record method according to item 6 of the scope of patent application, wherein the patient node has a set of key pairs, the set of key pairs containing the patient's public key and the patient's private key, and The patient public key is transmitted to the physician node in advance. According to the blockchain-based electronic medical record method according to item 6 of the patent application scope, before the patient node transmits the medical record information, the medical record information is encrypted according to the private key of the patient, so as to complete the The signature of the medical records. According to the blockchain-based electronic medical record method according to item 6 of the scope of patent application, wherein the doctor certificate includes a doctor certificate private key and a doctor certificate public key, the doctor node signs and signs the doctor certificate private key and provides the The public key of the physician certificate enables the patient node to verify the signature based on the public key of the physician certificate. According to the blockchain-based electronic medical record method according to item 6 of the scope of patent application, wherein the patient's private key, the patient's public key, and the doctor's certificate are generated and issued by a third-party public credential unit, and the disease The patient's public key and a doctor's certificate public key of the doctor's certificate are written into the blockchain for query.