Blockchain in Critical Care

Abstract

Background and aims

Intensive care units (ICUs) face growing challenges with cybersecurity, data interoperability, medication safety, and resource management in an increasingly digital healthcare environment. This review explores how blockchain technology can address these issues and improve critical care delivery.

Data sources

Relevant literature was sourced from peer-reviewed journals, healthcare cybersecurity reports, and studies on blockchain applications in medical settings.

Study selection

Included works focused on blockchain's role in enhancing data security, drug traceability, consent management, and integration with AI tools in ICU contexts.

Data synthesis

Blockchain offers tamper-proof health records, decentralized data sharing, and automated smart contracts, potentially transforming ICU operations. Benefits include improved patient safety, resource efficiency, and decision support. However, challenges such as scalability, regulatory concerns, and implementation costs remain.

Conclusion

Blockchain holds strong potential to enhance ICU workflows and patient outcomes. Realizing its impact will require collaborative efforts and further research to overcome current limitations.

How to cite this article

Gondode P, Dass C, Kumar S, Malviya A, Ashwin M, Khanna P. Blockchain in Critical Care. Indian J Crit Care Med 2025;29(6):525–530.

Highlights

• Blockchain enhances data security, interoperability, and patient privacy in intensive care unit (ICU) settings.

• Enables drug traceability and helps combat counterfeit medications.

• Facilitates secure integration of real-time data from IoMT devices for timely interventions.

• Streamlines ICU resource and bed allocation through transparent, auditable records.

• Secures patient consent and end-of-life decisions with immutable, accessible documentation.

Introduction

The ICUs are specialized wards designed to save lives by providing care to critically ill patients. They are among the most resource-intensive places in any hospital. In recent years, there has been a surge in the use of technology, especially in patient health records and data management. While catering the services to the critically ill patients, these units encounter many challenges such as enabling data interoperability across different medical devices and electronic health records, protecting private patient data, administering safe and precise drug dosages, optimizing the allocation of staff, equipment, and medications, and allowing real-time patient monitoring to enable timely interventions.^1–3 In the high-pressure environment of the ICU, where quick decisions matter, these issues are even more pronounced.⁴

A recently published report entitled “The State of Global Cyber Security 2025” has brought to light the alarming state of the cyber threat landscape in India. Over the past 6 months, organizations across the nation have experienced an astonishing average of 3,291 cyberattacks per week. This figure starkly contrasts with the global average of 1,847 attacks per week, underscoring the heightened vulnerability faced by Indian entities. Among various sectors, the Indian healthcare industry has emerged as the most severely affected, grappling with an overwhelming average of 8,614 cyberattacks per organization each week. This is followed closely by the educational and research sectors, which have encountered an average of 7,983 attacks, and the government and military sectors, facing 4,731 attacks weekly. The data reflects a troubling trend that not only jeopardizes sensitive information but also poses significant risks to operational integrity within these critical domains.⁵ In May 2024, India was rocked by a significant data breach that compromised a staggering 500 GB of biometric data, including sensitive information such as fingerprints and facial scans. This incident highlights the urgent need for enhanced cybersecurity measures. Similarly, the United Kingdom's National Health Service (NHS) experienced severe service disruptions due to a cyberattack orchestrated by the Russian hacking group Qilin, which successfully infiltrated a vendor named Synnovis, stealing over 400 GB of private medical data.⁶ The threat to the healthcare sector is further exacerbated by previous incidents involving esteemed institutions such as AIIMS New Delhi and the Indian Council of Medical Research (ICMR), which have been targeted in the past, resulting in the exposure of personal data belonging to approximately 815 million Indians. Such breaches not only compromise individual privacy but also fall outside the effective reach of traditional healthcare systems, which may lack the necessary agility and responsiveness to address these evolving threats.⁷

The ramifications of these cyberattacks extend beyond immediate data loss; they can adversely affect patient outcomes and escalate healthcare costs. Issues such as data silos, security breaches, medication errors, and suboptimal resource allocation can arise, ultimately compromising the quality of care delivered to patients.⁸ In light of these challenges, blockchain technology is emerging as a promising solution poised to transform the landscape of critical care. By leveraging the inherent security features of blockchain, healthcare organizations may enhance data integrity, improve interoperability, and safeguard sensitive patient information against the ever-evolving cyber threats they face. This innovative approach could play a pivotal role in reshaping healthcare delivery, ensuring that patient safety and data security remain paramount in an increasingly digital world.

At its most basic level, blockchain is a type of distributed, immutable ledger that records transactions in a secure and transparent way. Because no central authority is needed, it is a powerful technology in terms of data security as it eliminates single points of failure.⁹ Transparency across the supply chain guarantees that all stakeholders have access to a common, auditable record of information flowing along the supply chain, reinforcing trust and accountability. Blockchain includes cryptographic security to ensure data integrity and patient privacy. Immutable means there is no alternative: once the data has been recorded on the blockchain, it cannot be changed or removed, ensuring the reliability of the audit trail.¹⁰ These fundamental aspects of blockchain – decentralization, transparency, security, and immutability – find a strong alignment with the requirements of critical care, thereby presenting a pathway toward overcoming the aforementioned challenges and improving patient care in these high-pressure settings. This narrative review aims to investigate the potential of blockchain technology in solving the challenges of intensive care units. Utilizing the fundamental components of blockchain, this review highlights the application of this revolutionary technology in critical care, thereby potentially leading to better patient outcomes and more economics in the stream of healthcare delivery.

Basics of Blockchain Technology

Blockchain technology is essentially a decentralized, unchangeable ledger that records an ever-growing list of records, known as blocks, which are secured and linked together using cryptographic hashes. Each block contains a timestamp, a cryptographic hash of the previous block, and the transaction data.¹¹ This establishes a chronological sequence of blocks, and any effort to change an earlier block would not only alter its hash but also break the chain, alerting those in control of its authenticity to tamper attempts (Fig. 1).

Fig. 1.

Basic structure of blockchain technology

Functional and Security Blockchains

Several core mechanisms are the backbone of blockchain technology both from a functional and security aspect:

Consensus Algorithms

These ensures the network agrees on the validity of transactions and the addition of new ones to the chain. Consensus mechanisms can include methods such as Proof-of-Work, Proof-of-Stake, and Practical Byzantine Fault Tolerance. Each also impacts the energy efficiency, scalability, and security of the blockchain.¹²

Hashing

Cryptographic hash functions map input data of any size to a string of fixed length (the hash). This process is deterministic, so the same input will always produce the same hash. A minute variation in the input data will result in a completely different hash. This property is important to maintain data integrity and detect tampering.¹³

Smart Contracts

These contracts are self-executing with the terms of the agreement directly written into code, and they disperse among the blockchain. Smart contracts facilitate self-executing contracts with the terms of the agreement directly written into code, automating the execution of transactions once predetermined conditions are met, thereby removing the need for intermediaries and improving efficiency and trust.¹⁴

Governance Blockchains

Based on their access restrictions and governance, they can be classified as several types ofblockchains:

Public Blockchains

Open and permissionless, allowing anyone to take part in the network, access the ledger, and add their weight to the consensus process (e.g., Bitcoin, Ethereum).¹⁵

Private Blockchains

These are governed by a group of organizations with specific access controls and allowed participants. It offers more control and privacy but lose some decentralization advantages.¹⁶

Consortium Blockchains

These are managed by a group of organizations, providing a balance between decentralization and control. They are typically utilized in supply chain management and other collaborative use cases.¹⁷

Hybrid Blockchains

These are a fusion of public and private blockchains that allows organizations to benefit from both types of blockchains while modifying access and control mechanisms according to their requirements.¹⁸

Utilization of Blockchain in Critical Care

In healthcare systems, blockchain provides multiple benefits (Fig. 2). Blockchain technology has the potential to transform patient data management in the ICU. Healthcare providers can utilize the inherent characteristics of blockchain to generate interoperable electronic health records (EHR) that are shared across platforms and have strong patient privacy, data integrity, and data accessibility.

Fig. 2.

Applications of blockchain in critical care

Despite its great potential, electronic health record systems are currently plagued by interoperability challenges that hinder the seamless sharing of patient information across healthcare providers and organizations. Such interoperability issues can result in delays when urgent access to patient care data is needed, sometimes jeopardizing the quality of patient care. One solution lies in leveraging blockchain technology, which can provide a shared, distributed ledger that enables multiple authorized stakeholders to efficiently access and update patient records. This distributed model also minimizes dependency on a single source of truth and reduces the potential for data breaches or other centralization-related issues.

In addition, the cryptographic security features that blockchain provides ensure both the integrity and confidentiality of patient data. Every block in the blockchain is cryptographically connected to the block before it, making it a tamper-proof audit trail. Whoever wants to change or erase a data will be immediately identified, thus increasing confidence about the EHR system. Ensuring this added security is essential in the ICU, where accurate and reliable patientdata is critical for informed decision-making.

In addition, patients are better empowered via blockchain as they gain more control over their health data. Patients hold the private keys to their records and can share information securely with whichever healthcare providers they choose. This patient-centered method promotes privacy and builds trust between patients and healthcare providers.¹⁹

Drug Supply Chain and Medication Administration

Blockchain technology has great promise to improve drug traceability, reduce counterfeit medications, and provide medication administration compliance in the ICU. Blockchain can solve some crucial challenges on drug safety and supply chain integrity owing to its secure and transparent approach.

Drug Traceability

When every action in the lifecycle of a drug, from creation to administration, is stamped on a blockchain, healthcare providers can rely on a complete and verifiable history of the drug. The improved traceability means drug batches can be efficiently tracked, potential contamination sources can be traced, and drug recalls can happen much more quickly. In the rapidly moving world of the ICU, this kind of traceability can be essential in ensuring patient safety.²⁰

Pharmaceutical Anti-counterfeiting (PAC)

Counterfeit medicines pose a major threat to patient safety. This becomes impossible to control with conventional methods due to the wide number of counterfeit drugs going through various networks. Blockchain can directly address this issue by creating a secured and tamper-free system of verifying the authenticity of the drug. You could give each drug a unique digital identifier that is recorded in the blockchain, allowing healthcare providers to confirm where a drug came from and that it paths a legitimate drug before they give it to patients. It thereby minimizes the chances of dispensing fake drugs and consequently safeguards the patients from adverse outcomes.²¹

Compliance in Medication Administration

Blockchain may improve compliance with medication administration protocols in the ICU. When details of drug administration, such as the drug administered, dosage, time, and administering personnel, are recorded on the blockchain, it creates a permanent, auditable record. This record prescribing medicine can be used to ensure that medication regimens prescription compliance and medication safety in improving the greater pot. Additionally, smart contracts can be used to prompt automated actions regarding medication administration, like notifications of missed doses or potential drug interactions, aiding in patient safety.²²

Integration with Remote Monitoring and IoMT

Secure integration of data from wearables and Internet of Medical Things (IoMT) devices for ICU patients is possible using blockchain technology. This approach generates great amounts of real-time data with potential applications to enhance the monitoring and care of the patient. Nonetheless, securing the safety and accuracy of such information is crucial.

The adoption of IoMT has risen dramatically, and blockchain provides a robust approach to securing the data that the devices collect. The immutable nature of how data from wearables and other sensors can be encrypted and recorded on a blockchain provides a permanent and auditable record of patient health metrics. Such decentralized model does notrequire a centralized data store, minimizing security vulnerabilities and the risk of a single point of failure.²³

In addition, blockchain can enable authorized stakeholders to share secure data with healthcare providers. Patients can then use private keys to control access to their data, allowing only physicians, nurses, and other members within that care team if they choose to share theirdata. This increased autonomy gives patients greater control over who can access their data while also enhancing trust between patients and healthcare professionals.

In addition, smart contracts can be used to automate certain aspects of remote patient monitoring. For example, smart contracts can then set up alerts or notifications when vital signs reach certain thresholds, drawing the attention of healthcare providers to potential emergencies or changes in a patient's status. Such automated monitoring will potentially improve the speed of the healthcare system and patient outcomes.²⁴

Organ Donation Coordination

A potential example where blockchain or distributed ledger technology could facilitate organ donation and transplantation is in a critical care setting. Blockchain's transparency, security, and immutability can help dodge various challenges related to organ options, delivery, and verification.

Organ Tracking and Management

Blockchain can establish a secure and transparent system for tracking organs from donation to transplantation. This would create an entire and auditable history of the organ's journey by storing every relevant detail – from donor information, organ properties, transport logistics, to the recipient matching. Improved tracking would allow for increased efficiency, fewer errors, and decreased risk of loss or damage to organs.

Streamlined Allocation Process

By automating certain steps and ensuring transparency, blockchain can streamline the organ allocation process. This would enable the automation of the matching process between donors and recipients through smart contracts formed when certain conditions are met (e.g., matching blood type, tissue typing, proximity, etc.). Automated compactness minimizes delays, reduces human error, and provides a uniform, equitable distribution of organs.

Improved Verification and Security

Blockchain's securing capabilities can improve verification and security of organ donation records. This technology can minimize fraud and secure the transparency of donations by recording all transactions on a tamper-proof ledger. This increased security can help create trust between stakeholders and improve the overall system efficiency.²⁵

Information About Resource Allocation and ICUs Bed Management

During crises such as pandemics, ICU beds and facilities often face strain, but blockchain technology can mitigate this complication by ensuring that allocation of these scarce resource is handled effectively. Its transparency and security have the potential to make resource management more efficient, fair, and accountable.

True Summary of Power Sources

Blockchain may provide multiple medical crisis centers with the use of a shared information to see in real-time what ICU beds and resources are available. This critical insight allows resources to be distributed according to urgency, yielding authorities the ability to address shortages and maintain access to life-saving treatments. This real-time data can be critical for coordinating responses and managing surges in patient demand during a pandemic.²⁶

Transparent and Secure Allocation

Blockchain technology can create a tamper-proof ledger that records all resource allocation decisions, ensuring a transparent and secure process of resource allocation. Appropriate Use of Algorithm Transparency in Triage Decision-making. Algorithm transparency is an aid in triage. This transparency promotes fairness and equity in access to critical care and may help prevent favoritism or bias in resource allocation. In addition to this, the audit trail that blockchain enables can provide accountability and help analyze how resources were managed post-crisis.²⁷

Automated Resource Management

Smart contracts can be used to automate parts of resource allocation, e.g. by prioritizing patients by severity of illness or other criteria established ahead of time. Automation improves timeliness, reduces human errors, and creates better allocation of resources and in overall much more efficient way of fulfilling a need when it is required.

Consent and Decisions at the End of Life

However, blockchain technology provides a secure and transparent means of recording patient consent and advance directives, like Do Not Resuscitate orders, so that these significant choices are always accessible and tamper-proof.

Immutable Records

Patient consent and advance directives can be stored on a blockchain, creating an immutable record. Such immutability guarantees that these essential documents cannot be tampered with or removed without a trace, securing patient agency and mitigating the risk of future conflict. In implementation settings, particularly critical care settings where time is often of the essence, having documentation that is readily available and can be verified is important.²⁸

Improved Access and Portability

Blockchain can enable authorized healthcare providers to securely and efficiently access patient consent and advance directives. This increased accessibility is especially valuable in emergencies or when transferring a patient from one healthcare facility to another. Essential data are accessible precisely at the right time and location, thanks to the decentralized structure of blockchain that makes information sharingmore effortless.

Enhancing Trust and Transparency

Blockchain's transparent nature can build trust between patients, healthcare providers, and family members. Blockchain can help reduce misunderstandings and ensure that patient wishes are honored by maintaining a transparent and auditable record of consent and advance directives.²⁹

Barriers to Implementing Blockchain in Critical Care

Although blockchain holds significant potential for solving critical care, numerous hurdles must be overcome before widespread implementation.

Cost and Infrastructure

Adopting blockchain technology in critical care environments entails a substantial commitment to infrastructure and expertise. Implementing and maintaining a blockchain network in a secure and reliable way can be costly, especially for smaller healthcare institutions with fewer available resources. In addition, specialized hardware, software, and trained personnel add to the cost of the solution.

Classification and Standardization of Data

Effective data governance frameworks and protocols for standardization are essential to the successful deployment of blockchain-based solutions. In healthcare, data are siloed and stored in different file formats across different systems. When moving this data onto the blockchain, issues around data privacy, security, and interoperability need to be considered. Transactions, data formats, and governance models would need to be standardized to ensure data integrity and interoperability of healthcare records on the blockchain.

Scalability

Scalability is still a major limitation for blockchain technology, particularly in critical care settings where large volumes of data are produced from multiple sources. In critical care environments, data needs to be processed and analyzed in real-time; however, existing blockchain networks may not be able to meet the throughput required. More work is required to further enhance the scalability of blockchain for healthcare use cases.

Cybersecurity Risks

Although blockchain is generally regarded as secure, new cybersecurity threats, such as fear of quantum computing, must be addressed. The immense processing power of quantum computers may theoretically compromise the cryptographic algorithms that secure blockchain networks. This poses considerable danger to blockchain-based healthcare systems’ long-term security and integrity. The development of quantum-resistant cryptographic methods and other security measures to mitigate these threats is crucial, and the possible effect of quantum computing on blockchain security.

Solutions to these challenges will be critical for unlocking the full power of blockchain technology in critical care. These challenges can be overcome if stakeholders work hand-in-hand in a trained manner to make the best out of blockchain in the healthcare space, and also further research and development in this area will enable the health systems to implement such solutions.^30–32

Outlook and Future Perspective: Transforming Critical Care with Blockchain

Advancements in blockchain technology, combined with other cutting-edge technologies such as smart contracts and AI, hold immense potential for revolutionizing critical care applications.

Integration of Smart Contracts and AI

Smart contracts that carry out the purpose of a contract based on logical if-then rules may automate processes used in critical care, including resource allocation, insurance claims processing, and supply chain management. Artificial intelligence, when paired with blockchain technology, can take these applications to the next level by allowing real-time data analysis, predictive modeling, and tailored treatment plans. AI algorithms, for example, can analyze patterns in patient data stored on a blockchain and predict potential complications before they occur, enabling the medical team to intervene proactively.³³

Predictive Analytics and Personalized Medicine

Prediction level analytics in critical care can be implemented using blockchain because it allows the collection and sharing of data in a secure and transparently. These predictive models can help provide solutions by predicting patients at risk of developing a particular condition or complication and taking early action measures on the aforementioned, helping to provide personalized treatment strategy. Using the inherent capabilities of blockchain, genomic data can be securely stored and shared, enhancing personalized medicine by providing treatment based on a specific patient's genome.³⁴

Opportunities for Enhancement

Real-time Monitoring and Alerts

Blockchain could facilitate real-time monitoring of vital signs and other relevant patient data, with automated alerts sent to healthcare providers in case of anomalies.

Clinical Trials and Research

Blockchain technology can also play an important role in clinical trials by securely managing patient data, ensuring data integrity, and facilitating collaboration among researchers.

Medication Traceability and Supply Chain Management

By providing a transparent and immutable record of drug provenance, blockchain can help enhance medication traceability and counterfeiting prevention.

Secure Data Sharing and Interoperability

Interoperability is a term that describes the capability of health information systems to work together within and across organizational boundaries.

The true potential of blockchain in critical care will be achieved through further research, development, and collaboration between relevant stakeholders. Widespread adoption of blockchain technology hinges on overcoming challenges related to scalability, interoperability, and regulatory compliance. Nonetheless, the future of blockchain in critical care remains bright, offering the potential for a paradigm shift in healthcare delivery.

Conclusion

Blockchain technology holds transformative potential for critical care, offering solutions for secure data management, enhanced patient consent, and streamlined processes. By addressing key challenges such as scalability, standardization, and cost, blockchain can revolutionize critical care delivery. While barriers to adoption exist, ongoing research and development, coupled with collaborative efforts among stakeholders, are paving the way for a future where blockchain empowers critical care, ultimately improving patient outcomes and transforming healthcare systems.

Orcid

Prakash Gondode https://orcid.org/0000-0003-1014-8407

Christopher Dass https://orcid.org/0000-0002-9314-1472

Shailendra Kumar https://orcid.org/0000-0003-1140-5444

Amit Malviya https://orcid.org/0000-0003-4300-9788

Ashwin M https://orcid.org/0000-0001-8061-7315

Puneet Khanna https://orcid.org/0000-0002-9243-9963