When OneDose (formerly Hinckley Medical) officially rebranded in February, it marked more than a name change. It reflected the company’s evolution from a single hardware innovation into a broader point-of-care technology platform serving one of the most overlooked segments of healthcare: EMS and emergency professionals.
Founded by Tristen Hazlett, OneDose® is built on a clear, ambitious mission.
“Our mission is to turn every paramedic into a super paramedic,” Tristen says. “To give them the tools that they need in order to provide the best patient care they’re capable of.”
From the beginning, that mission has centered on supporting clinicians in the field, not through training programs or administrative tools, but through real-time, point-of-care clinical decision support.
An Overlooked, Under-Supported Corner of Healthcare
EMS occupies a unique and often misunderstood place in the healthcare ecosystem. “It’s very widely overlooked,” Tristen explains. “It’s not part of the healthcare system. It’s actually part of the Department of Transportation.”
That structural distinction affects everything from funding models to operational authority. Yet EMS professionals are delivering frontline emergency medicine every day. If you call 911, roughly 80 percent of the time it is for a medical emergency.
“Paramedics are our highest-volume first responders,” Tristen notes. “Overlooked, underpaid, and overworked is how you can characterize them.”
At the same time, hospital emergency departments are known for high stress and high churn. EMS providers operate at the intersection of those two realities—delivering emergency medicine in unpredictable field conditions before transferring patients directly into hospital care. In practice, EMS functions as an extension of the emergency room, even though it is administratively outside the traditional healthcare system.
For Tristen and his team, working alongside these professionals is more than a market opportunity. “It’s an absolute honor,” he says. “They’re here for service. They’re not getting into EMS to make a bunch of money.”
That respect for frontline clinicians is foundational to OneDose’s product philosophy.
From Guessing Patient Weights to Reinventing Point-of-Care Support
The company’s origins began with a simple yet startling realization: paramedics often have to guess patients’ weights. That guess affects medication dosing, equipment sizing, and clinical decisions.
“It all started with a conversation with a family member about how paramedics actually have to guess people’s weights,” he recalls. “I thought that seemed like a pretty big problem.”
That insight became a senior engineering project at the University of Nebraska–Lincoln, where Tristen graduated in 2020 with a degree in mechanical engineering. What he initially assumed would be a straightforward build turned into a three-and-a-half-year development journey.
The result was an FDA-regulated patient scale that attaches securely to existing ambulance gurneys. This product, now branded OneWeight, launched in 2023 and eliminated guesswork in medication dosing and equipment sizing by delivering accurate, real-time patient weight in the field.
But customer feedback revealed something bigger. They told the team, “You built a scale — but what does that help us with?” That question prompted a deeper dive into the EMS software landscape and what the team found was a space largely untouched by innovation.
“We found that the software side of EMS was completely underserved,” Tristen explains. “There hadn’t been innovation for the last 15 years.”
Paramedics were juggling fragmented tools — shared documents, standalone calculators, and disconnected reference materials — all while managing high-stakes clinical decisions.
A Customizable Clinical Decision Support Platform
In response, OneDose expanded into software. Developed throughout 2024 and launched in early 2025, the platform provides point-of-care clinical decision support designed specifically for EMS workflows. Typically deployed on tablets in ambulances, the application supports medication dosing, quick-reference protocol tools, equipment sizing calculators, and even voice-enabled AI queries.
“If you’re the paramedic using our solution, it’s an application,” Tristen explains. “But we also have an admin console and backend platform where agencies can build out their medication dosages, infusions, equipment sizing, calculators, and protocols.”
Customization is essential because EMS is not federally standardized; each agency operates under its own protocol set and governance structure. The OneDose platform allows departments to tailor their system so that what appears on-screen in the field reflects their exact clinical requirements.
The platform operates on a subscription-based model tailored to municipal and government realities. Agencies must establish budgets in advance and cannot accommodate unpredictable usage-based billing. A predictable subscription model allows departments to plan financially without the risk of unexpected year-end costs.
Today, approximately 3,500 of the roughly 23,000 EMS agencies in the United States use OneDose software, with deployments nationwide. The company has also established integration partnerships with major EMS electronic health record platforms and maintains hardware distribution partnerships as it continues to grow.
Scaling with Discipline and Mentorship
As a venture-backed company, OneDose is scaling with intention. The company previously raised $1.1 million in an angel round and recently closed an additional pre-seed round. With venture capital comes an ambitious growth trajectory, but Tristen and his team are deliberate about major decisions.
“These are one-way-door decisions,” he says. “You take someone’s money, or you enter a big partnership — things are going to happen.”
As first-time founders, Tristen and his cofounders, Michael Elsbernd and Colton Hazlett, sought experienced guidance through MESA. Over the past several years, they have worked closely with mentors Jason Marx and Mary Lynne Perushek.
“Without mentoring, I’m sure we would have failed a number of times by now,” Tristen says candidly.
Much of the mentoring relationship has focused on capital structure and high-impact partnerships.
“The goal was to take their experience and put it into our heads as much as possible,” he explains. “That’s the absolute most important thing any mentor can offer — real-world experience.”
Beyond business mechanics, the mentorship relationship has also provided visible leadership models for the team. Observing how seasoned executives communicate, evaluate risk, and think strategically has been equally valuable. Having trusted leaders to openly exchange ideas and learn from has strengthened both the company’s decision-making and its leadership development.
“Mary Lynne and I are honored to support the OneDose team on their growth journey,” MESA mentor Jason Marx shares. “As part of their mentorship, OneDose has tripled the agencies they serve, forged key partnerships, and expanded nationwide. Tristen and his leadership team remain intensely curious. That curiosity has led to valuable debate and better, more intentional decision-making.”
Engineering Support for Those Who Serve
At its core, OneDose is building tools to reduce cognitive load in high-stress environments. By eliminating guesswork and centralizing clinical decision support at the point of care, the company aims to support the professionals who carry extraordinary responsibility every day.
For Tristen Hazlett, the vision remains consistent: equip EMS professionals with technology that matches the importance of their role. In doing so, OneDose is not just innovating in emergency medicine, it is advocating for a workforce that has long operated without the support it deserves.
