The medical system has been dealing with a number of difficult problems with the verification, synchronisation,sharing, and storage of electronic health information. Additionally, the random distribution of patient records offers a variety of risks to patient privacy. The problem then becomes how to distribute data safely while preserving customer privacy. Blockchain has recently been mentioned as a potential solution to enable data interchange with the protection of security and privacy because of its advantages of immutability. In this paper, a decentralised electronic medical records searchable system with performance-enhancing blockchain technology is proposed. We first perform a hash computation on the electronic medical data in order to ensure its validity and integrity, and then we store the result on the blockchain. In order to solve the scalability problem of the blockchain, the interplanetary file system, a distributed storage technology, is used to encrypt and store the encrypted electronic medical data. These steps not only address the problem of centralised data storage on the servers of multiple medical organizations, but they also assist in easing the burden of data storage and frequent access to blockchain.

This system was developed on a private blockchain network where scalability was the key bottleneck. Medical health systems currently produce a large number of records across all of their activities. All of the records are kept in this system as blockchain transactions. The data might be made accessible to all authorised users using a blockchain ledger, improving visibility and raising awareness of growth throughout the therapeutic process. To optimise the blockchain, performance bottlenecks are identified. We have performed, utilizing optimal endorsement policies and code level changes on the blockchain. The performance of the proposed network is compared with existing blockchain network with blockchain benchmarking tool. The network performance is observed to outperform by 13% and 8% when compared in terms of transaction throughput and latency, respectively, while addressing the security and trust concerns of stakeholders.