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Circinus Medical Technology

Handheld navigation for spinal screw placement

Raised to date

$4.2M

of $5M offered across 1 Form D filing

Still open
$760K
Investors
11
Last filed
Aug 4, 2026

About

Circinus Medical Technology, LLC, which operates under the Bolt Navigation brand, designs and manufactures a handheld surgical navigation system for spine surgery. Its Bolt Navigation System uses gyroscope-on-chip technology and an iOS device to guide pedicle screw placement in open and minimally invasive posterior thoracolumbar and sacral procedures. The system received FDA 510(k) clearance in December 2022 and is sold on a zero-capital subscription model rather than as a capital purchase. The company was founded in 2019 and is based in Concord, Massachusetts.

A near-zero-footprint handheld navigation unit that works with standard pre-op CT/MRI and intraoperative X-ray instead of requiring an O-arm or dedicated navigation cart, is compatible with virtually any pedicle screw system, and is delivered as a maintenance-free subscription instead of a capital equipment purchase.

Funding

  • EquityFiled Aug 4, 2026Form D
    $4.2M/ $5M

Product

Bolt Navigation System

Surgical navigation device

A handheld, surgeon-controlled spine navigation system consisting of a reusable Bolt Navigation Unit that attaches to standard surgical instruments such as pedicle probes and drivers, plus single-use sterile disposables per procedure. It guides pedicle screw placement in the thoracolumbar and sacral spine (T-9 to S1) using a three-step acquire, plan, and navigate workflow.

  • Gyroscope-on-chip technology delivering real-time positioning to one hundredth of a degree
  • Runs on an iOS device with a familiar touchscreen interface
  • Works with standard pre-operative CT/MRI and intraoperative X-ray, no O-arm required

Built for

Spine surgeons and the hospitals and ambulatory surgery centers where they perform open and minimally invasive pedicle screw fixation

People on file