LC Engineering case studies

LC Engineering · Put your knowledge to work in context.

LC Engineering is a professional certification exam for clinical or biomedical engineers who install, maintain, calibrate, and support medical equipment in hospitals, clinics, and service organizations. It validates the applied engineering judgment behind safe device performance: electrical and electronic fundamentals, device safety and regulation, preventive maintenance and testing, technology management, cybersecurity, clinical physiology, facility environment-of-care requirements, and professional ethics. The LC Engineering case studies are 5 cases and about 5,082 words.

Line Isolation Monitor at 4.8 mA with a Reported Tingle in a Six-Bed ICU

At 02:10, in a six-bed adult ICU served by an ungrounded (isolated) power system, the line isolation monitor (LIM) at the nurses' station reads 4.8 mA hazard current and holds there; its alarm limit is set at 5 mA under the facility's NFPA 99 program. Bed 4 has a patient on mechanical ventilation and continuous renal replacement therapy (CRRT).

1,037 words, about 5 min 2

Critical SMBv1 Vulnerability in a 212-Pump Fleet the Vendor Will Not Patch

Northgate Health Partners runs three hospitals on one clinical network. Its fleet of 212 large-volume infusion pumps runs an embedded Windows platform whose last vendor-validated build dates from 2016.

1,003 words, about 5 min 3

Pulse Oximeter Reading 98% in a House-Fire Victim with a Measured SaO2 of 72%

A 62-year-old man is brought to the emergency department after being carried from a house fire. He is confused, has soot around the nares, a respiratory rate of 26, and is on 2 L/min nasal cannula.

887 words, about 4 min 4

Eleven-Year-Old Defibrillator Under-Delivering Energy at Annual PM

An 11-year-old manual defibrillator used as the backup unit in a 12-bed emergency department comes due for annual preventive maintenance. Bench results into a calibrated 50 Ω analyzer, using the unit's own paddles and cable: at 360 J setting, delivered 318 J; at 200 J, delivered 178 J; at 100 J, delivered 86 J; charge time to maximum energy 11.4 s; synchronized cardioversion delay 42 ms; battery 4.5 years old, discharged 26 times at 200 J before the low-battery indicator appeared.

1,047 words, about 5 min 5

Eight Occlusion-Alarm Complaints in 45 Days: Reportable or Not?

Over 45 days, a 340-bed hospital receives eight internal reports involving the same model of large-volume infusion pump: the pump continues infusing after a downstream occlusion, with no occlusion alarm, and the line is later found to have a kink or closed clamp. One case involved a vasopressor: the delay was discovered roughly four hours later, the patient became hypotensive and was transferred to the ICU for additional support.

1,108 words, about 6 min