The power of Prehab™
Unlock your natural potential to heal through the power of preparation.
The power of Prehab™
Unlock your natural potential to heal through the power of preparation.
What can you do to prepare for your surgery?
Preparing for surgery is a powerful way of preventing complications.
Prevention means a better recovery, reduced hospital stay, quicker progression to additional essential planned treatments, and most importantly, getting back to the things that matter.
We exist to make Prehab™ the global standard of care—ensuring every patient enters surgery stronger, more confident and better prepared.
Our mission is to empower every patient to achieve a complication-free surgical journey through Prehab™, combining the science of supraphysiological preconditioning™ with innovative digital tools—so they can achieve the outcomes they want and deserve.
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Prehab™ program
Follow a 8 week pre and post surgery program with expert insights and guidance
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Non-invasive and drug free
Bloom⁴³ works by heating the skin to 43°C (108°F). Simply wear the device over your breast for 3 hours the night before surgery.
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Evidence based platform
Our technology has been proven effective in two clinical trials and the app is home to a vast library of evidence based content *Proof of concept trials
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Wearable device for home use
Designed to fit seamlessly into your lifestyle, the lightweight, wearable BLOOM⁴³ device offers comfort and freedom, so you can stay active and get on with your day.
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FDA registered and ISO certified
BLOOM⁴³ is a class II 510k exempt medical device that complies with IEC 60601-1 and EMC requirements and meets international standards for safe, reliable medical devices.
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HSA/FSA payment eligible
Use your HSA/FSA funds to pay for the device
How does it work?
Part 1
Download the BLOOM⁴³ app
The BLOOM⁴³ app is a free, evidence-based resource designed to support and empower anyone preparing for breast surgery, or their support network. evidence-based resource designed to support and empower anyone preparing for breast surgery.
✔ Prehab™ and rehab program
✔ Trusted evidence based information
✔ Patient support community
✔ Track healing progress
✔ Support a loved one
✔ Personal data is secure and private
✔ DHAF certified and Orcha certified
Part 2
Precondition with the BLOOM⁴³ devicee
BLOOM⁴³ is a medical device that uses Supraphysiological Preconditioning™ to boost skin resilience. Clinical trials have shown that this technique can help prevent post-operative wound complications, such as skin necrosis
✔ FDA cleared medical device
✔ ISO 13485: 2016 QMS certified
✔ Drug free and non invasive
✔ Wearable technology
✔ Designed for home use
✔ Evidence based technology
✔ Eligible for HSA and FSA payments
Step 1
Download the app
Access evidence-based guidance and begin your Prehab™ journey.
Step 2
Get a prescription
Your healthcare provider prescribes the BLOOM⁴³ device.
Step 3
Order your device
Place your order through the app and receive BLOOM⁴³ before your surgery. BLOOM⁴³ is HSA/FSA eligible.
Step 4
Prehab™
Use the app to prehabilitate before surgery and complete your preconditioning treatment with the BLOOM⁴³ device the night before surgery.
Step 5
Recover confidently
Follow your post-op Rehab program in the app to support a smoother recovery.
Return the device easily and get your deposit refunded.
Personalised Prehab™ & rehab program
Follow an 8-week pre and post-surgery program with expert insights to support you before, during, and after your procedure.
Connect with other patients
Connect with a community of other patients on the same journey, share your experiences and support others.
Evidence-based content & patient stories
Explore a vast library of evidence based articles and videos to help you navigate your surgical journey with confidence.
Track your symptoms & healing progress
Monitor your recovery and stay on top of your health. Analyse patterns and gain insight into your health and wellbeing throughout Prehab™ and rehab.
Manage appointments & keep documents safe
Securely upload relevant clinical documentation, keep on top of your medical appointments and surgery details.
What patients are saying
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"It was great to feel that I was doing everything possible to ensure fast healing, and reduced pain and bruising, post procedure.”
BLOOM⁴³ patient
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“I am really happy I used the BLOOM⁴³ device. The difference in my healing and recovery between the biopsy (without BLOOM) and my surgery (with BLOOM) was like day and night.”
BLOOM⁴³ patient
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"Using BLOOM⁴³ was very easy and intuitive. It was comfortable to wear and easy to carry on doing things I needed the evening before surgery"
BLOOM⁴³ patient
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“I had a great experience with BLOOM⁴³! The ability to begin improving chances of surgery before the post-op recovery even starts is the biggest advantage
BLOOM⁴³ patient
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“I got a reduction mammoplasty and used the BLOOM⁴³ device prior to surgery. Preconditioning with BLOOM⁴³ helped me feel like I was getting a jump on the recovery and allowed me to have agency in setting myself up for the best possible outcome."
BLOOM⁴³ patient
What healthcare professionals are saying
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“We’re truly excited to be collaborating with Plexāā on the BLOOM⁴³ platform. It aligns perfectly with our mission to support patients through every step of their surgical journey — both physically and emotionally. The combination of evidence-based guidance and digital innovation is exactly what the future of patient care looks like.”
— Dr David Boudreault, MD, FACS
ILLUMINATE PLASTIC SURGERY
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“Plexāā really has an incredible technology that is built around science and addresses a need that we face everyday. They are building in an area that is the next forefront of innovation when it comes to plastic surgery. This product fits in a perfect beachhead when it comes to exposure to surgical intervention and improving outcomes when it comes to wound healing”
— Dr Rahim Nazerali, MD, MHS, FACS
STANDFORD MEDICINE
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“The team is excited about all the support that BLOOM⁴³ has to offer us. I believe that this is important new technology that will improve patient satisfaction and patient safety in a meaningful way”
— Dr Daniel Mills, MD, FACS
AESTHETIC PLASTIC SURGICAL INSTITUE
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"Healing well after a mastectomy is such a big concern for so many people, and I know it was a huge one for me! I did everything I could to get my body ready in terms of exercising and eating well, but was also grateful to have extra help with the use of BLOOM⁴³"
— Dr Anne Peled, MD
PLASTIC SURGEON & BREAST CANCER SURVIVOR
Found BLOOM⁴³ comfortable to wear and could easily continue their normal daily activities whilst using the device.
Said BLOOM⁴³ helped them feel well-prepared for their surgery.
Said BLOOM⁴³ gave them a sense of actively improving their chances of a successful surgery.
*BLOOM⁴³ early users program, 17 pilot participants
Evidence based
The BLOOM⁴³ device delivers ultra-precise Supraphysiological Preconditioning™ to boost blood flow and prime the skin, helping lower the risk of post-op complications such as skin necrosis.
Using a sensor-controlled, patented, intermittent thermal algorithm, BLOOM⁴³ triggers the release of protective Heat Shock Proteins (HSPs), including HSP-32, which induces the release of carbon monoxide in the local tissue- a powerful vasodilator and increases blood flow to the area.
Better blood flow means better healing.**
*Sources: “Local Heat Preconditioning in Skin Sparing Mastectomy: A Pilot Study”, Mehta S, Rolph R, Cornelius V et al., 2013; “A Randomised Controlled Feasibility Trial to Evaluate Local Heat Preconditioning on Wound Healing After Reconstructive Breast Surgery: The preHEAT Trial.”, Mehta S, Cro SC, Coomber B et al., 2019.**Source: Mehta et al, 2019FAQ
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BLOOM⁴³ is designed to be worn for 3 hours the night before surgery, pre-emptively priming your skin to get ready to heal. In clinical trials the effects of supraphysiological preconditioning™ have been shown to last many hours, with increased blood flow still seen hours after surgery.
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To use BLOOM⁴³, you’ll need a prescription from your doctor. Here’s a prescription template your doctor can use. Once the prescription is completed, you can place your order directly through the BLOOM⁴³ app. If your doctor would like more information about BLOOM⁴³, please ask them to contact our clinical team at info@bloom43.com
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BLOOM⁴³ is drug-free and non-invasive, ensuring no side effects or interference with treatment plans. This means additional procedures or treatments can proceed without delay. BLOOM⁴³ is even suitable for use by those who've had pre-operative radiotherapy. Ultra-precise, sensor-controlled, and a certified medical device BLOOM⁴³ gently preconditions the skin, without the risk of burns, offering safe and effective supraphysiological preconditioning™.
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BLOOM⁴³ is a FDA registered, Class II medical device, having undergone the necessary certification processes meeting the standards required of medical devices. This certification ensures its safety and suitability for use in the context of preparation for surgery. The benefits of supraphysiological preconditioning™ have been shown in two clinical trials.
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Preparing for surgery is a powerful way of preventing complications that might cause prolonged healing times, additional outpatient appointments or possibly even more surgery. BLOOM⁴³ works in harmony with your body, boosting its natural ability to respond to interventions, using the power of supraphysiological preconditioning™. This works by causing the release of naturally occurring heat-shock proteins, which protect our skin from the effects of surgery. They do this by improving the blood flow to the skin through the release of carbon monoxide, a potent vasodilator. The effect of better blood flow means more oxygen gets delivered to your skin. And better blood flow means better healing.
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Below is a breakdown of the cost:
$750 for one device
$900 for two devices
(Each device supports one breast, so bilateral surgery requires two.)
A refundable deposit is also required:
$200 for one device
$300 for two devices
The deposit is refunded once the device(s) are returned after surgery.
BLOOM⁴³ is also HSA/FSA eligible, which may help with payment if the patient has access to one of those accounts.
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Shipping is typically quick—devices usually arrive within 2–3 business days, and we aim to ensure they reach the patient at least three days before surgery. If your surgery date is approaching soon, please contact our customer service team directly and let us know when it is scheduled, and we will personally manage the delivery to ensure the devices arrives on time.
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BLOOM⁴³ is currently available for breast surgery patients in the U.S. market.
Our team is working hard to make it available in other countries around the world.
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Here’s the complete BLOOM⁴³ Instruction for Use manual