From FDA Reviewer to Medtech CEO

Interview with Zenflow CEO Shreya Mehta

Key Learnings From Shreya's Experience

  • Design your product to address unmet clinical needs — the technology should follow from there. Once Zenflow identified gaps in BPH treatment, the team focused on developing a solution that met patients’ desire for a flexible and reversible system, even in the face of technical challenges. This patient-centric approach informed engineering decisions and ultimately defined the Spring System’s value proposition in the market.


  • Treat FDA relationships as strategic business partnerships. With experience on both sides of the regulatory process, Shreya emphasizes building rapport with reviewers, noting it can lead to more productive outcomes — but just as important is the value of strong clinical evidence. Even if it means pursuing a more rigorous path like a PMA, solid data doesn’t just support approval — it drives adoption, reimbursement, and exit potential.


  • Leverage accelerator programs like Y Combinator and StartX to support the transition from academia to business — not just for fundraising, but to build essential business fundamentals and community support. For Zenflow, these accelerators helped transform its concept from "just an idea" with prototypes into a structured company with clear business parameters.

Shreya Mehta closed a Series C $24 million financing round for Zenflow just four days after giving birth to her daughter in 2024. "My daughter was born on Sunday night, and I literally had her in one hand and DocuSign in the other on Monday morning," Shreya recalls.

This high-stakes multitasking came during a pivotal moment in Zenflow's decade-long development of the Spring System, a minimally invasive treatment to relieve symptoms related to benign prostatic hyperplasia (BPH). The device uses a small spring-like coil to gently prop open the urethra, improving urinary flow while preserving the patient's anatomical structures.

"Our approach in particular is really unique in that we deliver not just with a gentle implant, but also a flexible system," Shreya explains. "It doesn't require any catheterization after the procedure. Then most importantly, the implant is removable, making the procedure totally reversible."

This combination of features enables the procedure to be performed in a urologist's office with minimal recovery time, and its reversibility addresses a significant concern for patients considering treatment.

Zenflow has positioned the device as a first-line therapy. "By virtue of it being a much more patient-friendly procedure and approach, we think that we can open up the market to many millions of more patients. Obviously, billions of dollars is a larger market opportunity," she says.

Zenflow has treated approximately 300 patients through pilot and pivotal studies and is preparing for PMA approval with commercialization expected in 2026. The company's journey offers valuable insights for other medical device entrepreneurs navigating the complex terrain from concept to commercialization.

CEO of Zenflow

Shreya is the co-founder and CEO of Zenflow, a medical device company focused on treating benign prostatic hyperplasia (BPH). A biomedical engineer, she brings over 15 years of experience in medtech, including serving as a lead reviewer at the FDA, where she specialized in cardiovascular devices. Shreya co-founded Zenflow in 2014 out of the Stanford Biodesign Innovation Fellowship. The company was one of the first medical device startups backed by Y Combinator and also received early support from StartX and the UCSF Rosenman Institute at QB3.

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Ground Your Device in Unmet Clinical Needs

For Shreya, a key lesson is to focus on genuine patient problems — technology should follow. 

"One of the things I say is always start with the unmet clinical need," Shreya says. "Ground yourself in that. [Technological potential] is really tempting as an engineer, especially. We like toys. We like complex systems.” But if your product isn't addressing a meaningful gap in care, the technical bells and whistles won't matter. “It's already difficult to survive in the startup world," Shreya adds.

This philosophy was tested early in Zenflow's development when the team faced pressure to abandon their flexible delivery system approach in favor of a more technically straightforward rigid design. 

"I was challenged very early on. I started off as CTO at the company, and it's like, Can we just do this through a rigid system?" she recalls. "At the end of the day, the patient friendliness of this approach is what's going to drive the market and adoption. We were persistent — some might call it stubborn — [about sticking] with a flexible approach."

Similarly, the team identified removability — and therefore reversibility of the procedure — as another critical unmet need. This feature addresses a significant psychological barrier for patients contemplating treatment for a sensitive condition.

"When men have BPH issues, it's the first time that something's happening below the belt that isn't pleasure," Shreya observes. "For men, it's a very private decision. It's something that's really meaningful to them."

By allowing patients to try the treatment with the assurance it can be reversed if needed, Zenflow's approach mirrors the familiarity of medication: "It's similar to drugs. If it's not working for you, if you're having a side effect that's not worth the benefit, you can stop taking the drug. Similarly, you can have the implant removed."

When facing technical challenges with the flexible delivery system, Shreya's team could have taken the easier path and limited the product’s flexibility. Instead, they stayed grounded in the patient's perspective. "If that piece of your technology is likely to be the game changer, the difference maker in this space, then lean into it," she advises. "There are always shortcuts and easy ways out. But if you're grounded in what's most important…the patient's decision, then I think you’ve got to stick to your guns."

Zenflow’s commitment to prioritizing patient needs paid off. It gave the team a clear benchmark: every technical decision had to support their ultimate goal of creating a solution patients would willingly choose over existing options.

Firsthand observation played a critical role in identifying real clinical needs and keeping the team aligned. It helped them stay focused, grounded in the belief that they were working from accurate, experience-based insights. Instead of relying solely on physician interviews or market reports, Shreya champions an immersive, in-person approach — one that puts entrepreneurs directly in the clinical environment.

“Any opportunity you have to be alongside key opinion leaders, physicians, or even nurses in the field or operating room — take it,” she advises. “With firsthand observation, you learn far more than what’s conveyed verbally.”

Treat FDA as a True Partner 

Having sat on both sides of the regulatory table — as an FDA reviewer and now as a startup CEO navigating the PMA process — Shreya offers valuable perspective on how to work effectively with regulators. Her central insight: treat regulatory relationships as critical business partnerships, not just bureaucratic obligations.

She highlights a common industry oversight — medical device companies often invest significant effort in building ties with suppliers, vendors, and financial institutions, but neglect to cultivate similar rapport with regulators. This missed opportunity can have real consequences, potentially affecting both approval timelines and outcomes.

While maintaining professional boundaries, Shreya emphasizes the importance of building authentic connections with reviewers. “Yes, they’re regulators, and you have to be thoughtful about what you say — but at the end of the day, it’s still about relationships,” she explains. “You need to invest in building a rapport with your reviewer.”

Companies that take this approach often see tangible benefits. “I was often on a text basis with my best companies,” Shreya recalls of her time at the FDA. “That doesn’t mean it wasn’t professional, but having that relationship and being able to get questions answered quickly — that’s going to be to your company’s benefit.”

While it can be tempting to pursue the least burdensome regulatory path, Shreya is a believer in pursuing a PMA when it makes sense – oftentimes, these are the big and bold unmet needs. 

“Don’t necessarily shy away from a PMA path,” she advises. “Even if you have a Class II device, oftentimes you don’t see the level of adoption you expect until you gather clinical data on that device.”

She points to industry data linking strong clinical evidence with better exit outcomes. “By virtue of pursuing a PMA — you might have to run a randomized controlled trial — but that’s building real value,” she says. “You might feel a little burdened by the regulatory path, but I think it’s okay to pursue that because you’re strengthening the company.”

Shreya’s mindset and focus on the bigger picture helped the Zenflow team navigate the complexities of the PMA process. Rather than viewing regulatory hurdles as setbacks, they treated them as opportunities to improve their product and reinforce their market position. The clinical evidence collected through their pivotal trial has not only supported their submission but also bolstered credibility with physicians and strategic partners.

Shreya underscores that the benefits of clinical data extend well beyond approval. “That clinical evidence is everything — even from a reimbursement standpoint,” she notes.

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Leverage Accelerator Programs for the Academia-to-Business Transition

For Zenflow, participation in prominent startup accelerators like Y Combinator and StartX played a crucial role in transitioning from academic concept to viable business. Shreya credits these programs with providing not just fundraising opportunities, but essential business frameworks and community support.

Shreya says the programs provided structure around business fundamentals that technical founders often lack: "It gave us a lot more parameters around the business side of things. Fundraising, obviously, is something that we had to work on, but also resources around IP."

Beyond formal programming, Shreya notes the value of connecting with entrepreneurs at similar stages of company development. "Having the community of those other startups surrounding us in the same place of evolution of their company was really helpful," she says. "Sometimes you just need a sounding board from people who are going through the same thing that you are."

The accelerator experience culminated in Y Combinator’s Demo Day, which helped the Zenflow team secure initial financing — an important milestone in the company's journey from Stanford lab project to venture-backed startup.

Final Thoughts: The Path Forward

With PMA approval and commercialization targeted for 2026, Zenflow is preparing for the next phase of its development. The company plans to expand its commercial team later this year.

Shreya’s experience navigating both technical and business challenges offers several practical takeaways for medtech entrepreneurs. First, she emphasizes resilience when facing inevitable setbacks: "There'll be things that feel like you took two steps forward and one step back, but that's still progress. And sometimes we learn best from those setbacks."

Second, she advises entrepreneurs to actively seek out and incorporate critical feedback: "Don't surround yourself with yes-men. Surround yourself with people who are going to challenge you." This approach helped Zenflow refine its technology and business strategy over time.

Perhaps most importantly, Shreya underscores that patient impact remains the driving force behind the work. “It has been most gratifying to see patients truly affected by this technology,” she says, recalling how physicians have shared stories of patients moved to tears by their symptom relief.

“It’s those moments that keep me and the team going every day,” Shreya adds. “That’s why we do what we do in medtech.”

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