How blockchain is set to revolutionize health tech
When a group of developers, presumed to be working under the pseudonym Satoshi Nakamoto, launched Bitcoin in 2009, it is unlikely they were thinking about whether or not they were on the cusp of a great medical discovery. After all, the promise of lower transactions fee than those that were on offer from traditional online payment methods at the time, was a concept clearly rooted in finance.
The idea was simple. Bitcoin is a decentralized currency and therefore it can be traded without central banks. All that was required was a digital ledger that could distribute the currency. So not unlike many medical discoveries, when Satoshi Nakamoto was focusing on one area, they actually made a superior discovery in another. Once the furore around cryptocurrencies did eventually die down, many commentators were quick to point out that it might be the underlying ledger, blockchain, that could really have wider applications.
So what does a public ledger have to do with healthcare and why is it relevant now, over a decade after blockchain was invented?
The question cannot be answered solely by referring to Covid-19 but it is important. The pandemic has created numerous obstacles in providing care, including concerns about viral spread within primary care, potential shortages in intensive care capacity, and challenges obtaining sufficient levels of personal protective equipment (PPE).
In less than two months, A&E attendance fell by half and there were concerns people with serious conditions were staying away and not getting access to the treatment they needed. In response, GP surgeries were advised by NHS England to move to a total online triage system. Now only one in four patients are seeing their GP in person and the NHS is undergoing a complete overhaul in how it delivers healthcare.
It's therefore possible the healthcare sector is entering a new era, one that will see a digital explosion that almost every other industry has been enjoying over the last decade. We all knew for years that demand for healthcare was slowly outstripping existing clinical resource as populations aged and health provision became more sophisticated and expensive. Covid-19 has accelerated this problem by generating extraordinary demand on health systems around the world in a very short space of time, making it clear that technology is the only way to meet these surges in demand.
This all starts with personal data. The more that can be collected and analysed, the better picture of an individual’s health a clinician is going to get. In the past, the data points a clinician needed to make a patient assessment were few and far between and often arduous to collect. However, now we are able to track almost every aspect of our personal health in near real time, creating a continuous and increasingly detailed picture of our body’s functions. This will make it easier and easier for clinicians to draw more and more accurate assessments and potentially spot issues before they happen.
We are just at the start of this new era, where personal data becomes the basis of treatments and preventative care. However, despite its potential, data portability across multiple systems and services is a real issue. There is nothing more valuable and personal to an individual than their personal medical records, so making data shareable across services will inevitably raise concerns around the spectre of data being misused.
Currently, data does not flow seamlessly across technology solutions within healthcare. For example, in the UK your hospital records do not form part of your GP records, but the advantages are clear in terms of treatment and preventative care if they were to do so. Unfortunately, it is not likely a centralised storage and delivery system will get traction until there is one that can ensure the appropriate encryption and security. The risks are simply too high.
Yet, it is an issue that a technology like blockchain can tackle. This is because the purpose of the chain is to store a series of transactions in a way that cannot be altered or changed. What renders it immutable is the combination of two opposing things: the cryptography and its openness. Each transaction is signed with a private key and then distributed amongst a peer to peer set of participants. Without a valid signature, new blocks created by data changes are ignored and not added to the chain. While it does then become a public artefact, inspection of blockchain does not reveal any data, only IDs and hash codes. That is why it becomes an incorruptible digital ledger. As a decentralised and distributed system, a hack into even just one part of the system will not affect any others.
In principle, blockchain might be useful in any situation where we currently trust someone to manage our data in ways that help us to interact. Instead of storing Bitcoin, blockchains could instead be used to store our medical records. In that way, we would resume ownership of our data, while also allowing others to interact with it at our convenience. Blockchain could therefore play a vital role in underpinning our digital progress and giving health professionals more access to vital data.
Of course, data is useless in itself and intelligence is required to interpret it and find patterns to generate benefits. For example, at Doctorlink we use patient data to assess, prioritise and direct patients to the right healthcare instantly at any time of day or night in a process known as triage. Our online triage algorithms in some GP surgeries have created up to 30% additional capacity in the system simply by making sure the right patients get to see the right healthcare provider at the right time.
Digital transformation is coming to healthcare. We have achieved great amounts in the last decade, but ultimately, we are still only at the beginning of this process. The healthtech sector is very vibrant at the moment, but too many companies are still focused on issues like how we bring medical services to the patient, such as talking to your doctor via a video chat or getting your prescriptions delivered to your door.
Instead, a second phase where using technology to enhance clinician’s capabilities and allowing them to operate at the top of their licence is where we can expect to see real efficiency. Not just by handling more patients, but by handling them more effectively and treating their conditions more easily. Blockchain’s unique ability to both protect and flexibly hold our data could provide the crucial step between these two phases, allowing healthcare to advance with the times.
Ultimately, as a delivery system that can ensure appropriate encryption and security, blockchain could provide us with a platform to securely protect healthcare’s exciting future. With research already suggesting that 55% of all healthcare applications will have employed blockchain by 2025 and with the global healthcare market spend on blockchain expected to hit $5.61 billion per year by the same time, blockchain technologies are set to become a major factor in future healthcare programs.
Rupert Spiegelberg is the Chief Executive Officer at Doctorlink, the UK’s leading online triage platform, providing 24/7 access to healthcare for 12.5 million NHS patients covering 1,500 GP practices. The platform has also recently been selected by the NHS for a new digital roll out that will see online video consultations and digital triage extended to millions more.
Data de-identification - why it matters in healthcare
Large amounts of healthcare data is generated yet goes unused due to privacy concerns. To address this, data privacy firm TripleBlind has created Blind De-identification, a new approach that allows healthcare organisations to use patient data while eliminating the possibility of the user learning anything about the patient’s identity.
We asked Riddhiman Das, co-founder and CEO to tell us more about data de-identification.
Why is data de-identification important in healthcare?
Blind De-identification allows every attribute of any given dataset to be used, even at an individual level, while being compliant to privacy laws, rules, and regulations by default.
Governments around the world are adopting global data privacy and residency laws like GDPR, which prohibit citizens’ personally identifiable information data from leaving the borders of the country. While great for data protection, data residency laws result in global silos of inaccessible data. TripleBlind allows computations to be done on enterprise-wise global data, while enforcing data residency regulations.
In the US, HIPAA compliance has relied on what is called the Safe Harbor method, which requires removing 18 types of personal patient identifiers like names, email addresses, and medical record numbers. The Safe Harbor method can be too restrictive with the data or can leave too many indirect identifiers, which puts the patient data security at risk. Getting de-identification wrong could make an organisation liable for a costly mistake.
What does TripleBlind's solution do?
With TripleBlind, data is legally de-identified in real time with practically 0% probability of re-identification. Our solution allows analytics on data containing personally identifiable information and protected health information with zero possibility of re-identifying an individual from the dataset. This allows healthcare organisations to access more meaningful data, creating more accurate and less biased results.
For example, a healthcare drug researcher in a rural, predominantly white area, would only have patient data that would reflect their local population. With TripleBlind’s de-identification, they could more easily leverage third-party data from another healthcare facility in a more diverse region, creating a more complete data set that more accurately reflects the larger population. This has the possibility to create more accurate diagnoses and better drug results for more diverse populations.
How can healthcare organisations use this in practice?
TripleBlind is blind to all data and algorithms. That means we never take possession of customer data. We only route traffic between entities, enforce permissions, and provide audit trails. The enterprise’s data remains under their control. TripleBlind does not host, copy or control their data, algorithms or other information assets, ever.
We facilitate a connection to an encrypted version of their information assets. Our technology allows the algorithms and data to interact in an encrypted space that only exists for the duration of the operation. Organisations use their existing infrastructure, so it’s not hardware dependent.