# Puncture wounds, except gunshot wounds at Cox Engineering Inc
> OSHA SIR `2023043093` · 4/7/2023 · BURLINGTON, MASSACHUSETTS
## Severity
- **1 hospitalization**
- **Body part:** Hand(s), except finger(s)
- **Nature of injury:** Puncture wounds, except gunshot wounds
## Cause
- **Event:** Struck by discharged object or substance
- **Source:** Valves, nozzles
- **Secondary source:** Nitrogen
## Employer
- **Name:** Cox Engineering Inc
- **Location:** 400 Summit Drive, BURLINGTON, MASSACHUSETTS, 01803
- **NAICS:** 238220
- **Jurisdiction:** 1
## Narrative

An employee was conducting HVAC work when a valve released from the system and contacted their left hand. The valve punctured their left hand at the center of the palm and filled their left hand and arm with nitrogen.

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*Source: [OSHA Severe Injury Reports](https://www.osha.gov/severe-injury-reports) · MORVS · CC0 1.0*