Sterilization and Packaging Full Process of Disposable Electrosurgical Pencils

Published: JULY 27, 2026 - Shanghai Zhichen Medical Technology Co., Ltd.

Disposable electrosurgical pencils are critical sterile single-use medical consumables for cutting and coagulation during open and minimally invasive surgeries. All finished pens must be produced, disinfected and sealed in a 100,000-class dust-free clean workshop following ISO 11135 sterilization specifications to meet global hospital hygiene and clinical safety standards.

1 Pre-Sterilization Cleanroom Pretreatment Process

1.1 Full Visual Inspection

After assembly, each electrosurgical pencil goes through full appearance inspection. Staff check handle insulation integrity, wire tightness, tip sharpness and protective cap assembly, filtering out deformed, scratched or defective products before entering cleaning links.

1.2 Precision Dust Removal & Surface Purification

All qualified pens enter closed dust removal equipment to eliminate workshop floating dust, fiber residues and surface impurities. Sharp metal tips are fitted with protective sleeves to prevent scratching packaging film and secondary contamination in subsequent procedures.

1.3 Batch Classification & Loading

Products are sorted by model specification and placed on dedicated sterilization trays with uniform stacking height, ensuring ethylene oxide gas can fully penetrate every product gap during disinfection.

2 EO Low-Temperature Sterilization Standard Cycle

Ethylene oxide sterilization is the mainstream disinfection solution for temperature-sensitive surgical pens, avoiding high-temperature damage to plastic handles, insulated wires and stainless steel cutting tips. The whole cycle strictly follows international medical sterilization standards.

2.1 Preconditioning & Vacuum Extraction

Adjust constant temperature and humidity inside the sterilization chamber first, then extract air to form negative pressure, removing residual air trapped between product structures to facilitate EO gas penetration.

2.2 EO Gas Infusion & Constant Temperature Permeation

Inject calibrated concentration ethylene oxide gas, maintain stable temperature and pressure for several hours to kill bacteria, fungi and microbial spores attached to the pen surface and internal gaps.

2.3 Aeration Degassing Treatment

Complete sterilized products go through long-term aeration to fully volatilize residual ethylene oxide, strictly controlling residual value within medical safety limits to prevent skin irritation during surgery.

2.4 Biological Indicator Verification

Each sterilization batch is equipped with biological test strips. Only when the indicator confirms complete microbial inactivation can the batch be transferred to packaging procedures.

3 Automatic Sealed Packaging Production Line

3.1 Single Medical Paper-Plastic Pouch Sealing

Each electrosurgical pencil is independently packed in breathable medical composite film. The material has strong barrier performance to isolate external bacteria, moisture and dust during storage and transportation.

3.2 Batch Outer Carton Labeling

Sealed single products are counted and packed into uniform outer cartons, printed with production batch, sterilization date, expiry date, product model and CE export related information for full batch traceability.

4 Closed-Loop Quality Control Advantages

The integrated flow of cleanroom pretreatment, EO low-temperature sterilization and dust-free automatic packaging effectively avoids secondary contamination of surgical pens. The complete sterile packaging system guarantees stable sterile validity during long-term warehouse storage and cross-border logistics, fully complying with medical device supervision requirements of European, Southeast Asian and Latin American markets.