Clinical Resources

The Clinical Resources below are designed to support prosthetists and clinicians working with the ProHensor® VC and VCAL systems. Each section provides evidence-based materials to help you deliver confident fittings, accurate reimbursement submissions, and consistent training for patients in clinical practice.

Beyond the Band

Resources referenced in the CE Course "Beyond the Band."

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Cover of Marins ‘Beyond the Band’ CE course on VC and VCAL prosthetic training.

VCAL Technology Quick Reference

Purpose: Explain the mechanics and options of Voluntary Closing Auto Locking (VCAL) terminal devices in clear, non-prescriptive Use as a downloadable handout within the eLearning course.

Download VCAL Quick Reference


VCAL Clinical Rationale Aids

One-page explanations that link mechanism choice to safety, fatigue, and ergonomics, with simple visuals comparing VO, VC, and VCAL. Use during or after the course to reinforce why and when to use locking vs non-locking control.

Download Clinical Rationale

VCAL Evaluation Testing Protocols

Step-by-step instructions for four quick, repeatable in-clinic tests (Oscillation Bar, Weighted Box Hold and Carry, Tip-Grip Penny Pick-and-Place, Small Peg Placement). Includes purpose, setup, procedure, and what to record for VO, VC, and VCAL.

Download Testing Protocols

VCAL Evaluation Scoring Sheet

Single-page worksheet to capture results from all tests across VO, VC, and VCAL, including time, errors, regrips, gaze checks, RPE, and notes. Designed for easy comparison and documentation in the patient

Download VCAL Scoring Sheet

Beyond the Band References

Curated citations and further reading that support the course content on mechanism differences, cognitive load, and functional outcomes. Useful for justification, staff education, and follow-up study.

Download Course References

Reimbursement Toolbox

Resources for suggested pathways for Reimbursement. Not a guarantee of coverage.

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ProHensor VC and VCAL LockCore Reimbursement Guide

Concise billing aid for ProHensor claims, outlining suggested HCPCS pathways for VC (L6722) and VCAL Locking Cartridge as NOC (L7499 with narrative), plus documentation checklists and sample narratives. Not a guarantee of coverage.

Download Guide

Reimbursement Reference Card

This Reimbursement Reference Card summarizes key HCPCS coding guidance, coverage criteria, and documentation reminders for the ProHensor® VC and VCAL LockCore. Designed to help clinicians and billing teams streamline prosthetic reimbursement and claim accuracy.

Download Reimbursement Card

Warranty Information

Learn about warranty coverage for the ProHensor, including the terms for standard and modular components. This document outlines what’s covered, warranty duration, and how to initiate a service or replacement request.

Download Warranty

Specifications (weight and size)

The specifications of weight and size of the ProHensor with a VCAL LockCore installed.

Download Specs Sheet

Benefits to Wearer Chart

A quick-reference guide highlighting the functional, ergonomic, and psychological benefits of body-powered prosthetic systems, specifically how the ProHensor’s design improves safety, reduces fatigue, and enhances user confidence.

Download Benefits Chart

Sample Letters

Pre-drafted sample letters that clinicians can use for insurance documentation, appeals, and justifications. Each letter aligns with standard reimbursement language and can be tailored to the patient’s case.

Download Sample Letters

Directions for Use

Step-by-step instructions for the safe use, adjustment, and care of the ProHensor® VC and VCAL systems.

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Marins Inc. patented locking cartridge seen from the side, held with fingers, with a black background.

Assembly Instructions

Step-by-step instructions for assembling the ProHensor system, from initial setup to secure connection of key components. Designed to support clinicians during fitting and maintenance.

Download Assembly Instructions

Directions for Use

Comprehensive directions for the safe and effective use of the ProHensor.

Download Directions for Use

Replacing the VCAL LockCore Cartridge

An illustrated guide showing how to remove and replace the LockCore Cartridge in the ProHensor VCAL. This reference is designed for clinicians to perform the process safely and efficiently in the field or clinic.

Download Cartridge Replacement Instructions

Three Modes of Function

A visual overview of the ProHensor’s three operating modes: wide lock, narrow non-lock, and narrow lock. Explaining their ideal use cases and how to switch between them during patient training.

Download Three Modes Instructions

Finger Installation

Instructions for installing or replacing ProHensor fingers. Includes torque guidance, safety notes, and maintenance tips to ensure precise alignment and reliable performance.

Download Installation Instructions