Qingshi Bio — Advanced Wound Care | VSD Systems · Hydrogel Dressings

Core Technology

VSD (Vacuum Sealing Drainage) Closed Negative Pressure Drainage Kit

Vacuum Sealing Drainage (VSD) applies controlled negative pressure to create a sealed wound environment — efficiently draining exudate, controlling infection, accelerating granulation tissue growth, and significantly shortening healing time. Qingshi Bio's VSD platform delivers a complete, sterile, clinically-ready medical device solution.

› Flow Rate ≥8 L/min — Efficient exudate removal from high-output wound beds

› Pressure Accuracy ±10 mmHg — Stable and reliable negative pressure delivery

› Dual-Material Sponge: PVA (white) or PU (black) for different wound types

› Type I / Type II — Single-tube and dual-tube configurations

› Sizes: 10×6, 15×5, 15×10, 20×15 cm — covering most wound geometries

› Complete Closed Drainage System — No additional components required

› OEM/ODM Customization: Configurable specs and custom sizes available

Three Configurations to Meet Clinical Needs

3 Configurations · 4 Key Advantages

⚠ Contraindications

Active bleeding · Coagulopathy · Untreated osteomyelitis · Malignant tumor in wound bed

Clinical Notes

Anti-infective combo · Monitor protein/electrolytes · −125 mmHg continuous · Replace 48–72h

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Application Procedure

01

Wound Preparation

›Assess size, depth & condition
›Debride all necrotic tissue
›Irrigate with 500–1000 mL saline
›Control bleeding & measure wound

02

Foam Fitting

›Select PVA or PU foam type
›Trim foam 1–2 cm beyond wound margin
›Pack all cavities — zero dead space
›Embed drainage tube 3–5 cm into foam

03

Film Sealing

›Protect peri-wound skin (3–5 cm margin)
›Drape film from centre outward
›Overlap edges ≥3 cm, seal all seams
›Test for air leaks after activation

04

Connect & Activate

›Attach tube to VSD device securely
›Set to −125 to −450 mmHg
›Confirm foam collapses evenly
›Document baseline & brief patient

05

Monitor & Change

›Check pressure & seal every 2–4 hrs
›Monitor drainage volume & colour
›Replace dressing every 48–72 hours
›Wean off when granulation is complete

Design Principles

PVA Sponge — Hydrophilic Material

✓ Soft texture, pore size 0.2–1 mm ✓ Maintains pore structure under negative pressure ✓ Three-dimensional interconnected microstructure ✓ Excellent fluid passage through foam ✓ Good resistance to blockage and adhesion ✓ Excellent biocompatibility

PU Foam — Hydrophobic Material

✓ Open-cell structure, pore size 400–600 μm
✓ Compresses to <50% volume under negative pressure
✓ Draws wound edges together effectively
✓ Does not harden after fluid extraction
✓ Generates macrostrain & microstrain on wound
✓ Stimulates rapid granulation tissue growth

Product 2 of 3

NMPA Reg: CQ Med Dev No.20192140059

Bio-Active Hydrogel Functional Dressing

Moisture retention ≥90% — maintains optimal moist wound environment 24 hours a day
pH 7.2 neutral formula — scientifically proven to promote fibroblast proliferation and epithelialization
Painless dressing changes — non-adherent wound interface eliminates mechanical damage during removal
Pain reduction ≥90% vs traditional gauze during dressing changes (VAS scale clinical data)
Sterile individual packaging — 1g, 1.7g, 2g configurations
Promotes faster wound closure — clinical studies show mean 2.4 days earlier complete epithelialization
Transparent matrix enables wound inspection without dressing removal

For: Ulcers · Burns · Donor sites · Pressure injuries (Stage I–II) · Post-dermatological procedure wounds

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Product 3 of 3

NMPA Reg: CQ Med Dev No.20182140089

Disposable Medical Hydrogel Eye Patch

24-hour corneal moisture retention — prevents exposure keratopathy in sedated patients
Intraoperative corneal protection — complete sealed barrier without pressure on the globe
Sterile individual packaging — eliminates cross-contamination risk between patients
Dimensions: 158mm × 58mm — full orbital coverage for adult patients
Clinical data: 0% corneal epithelial breakdown at 24h vs 11.7% in untreated control group
Hypoallergenic medical-grade acrylic adhesive — painless removal without skin irritation
Up to 72-hour continuous wear capability — reduced nursing intervention frequency

For: General anesthesia surgery · ICU long-term bedridden patients · Sedated emergency patients · Post-ophthalmic procedures

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Hydrogel Eye Patch

Packaging

Clinical Use

Clinical Applications

Eight Clinical Scenarios, One Integrated Platform

🩹

Chronic Wound Care

Persistently stalled wound closure — diabetic foot ulcers, pressure injuries, and venous leg ulcers. VSD + hydrogel therapy addresses both bioburden control and moisture deficit simultaneously.

Diabetic Foot Ulcer Pressure Injury Venous Leg Ulcer

⚡

Acute Trauma Repair

Traumatic lacerations, burns, and post-surgical dehisced incisions require rapid granulation stimulation. NPWT system provides continuous sub-atmospheric pressure across irregular wound geometries.

Trauma Burn Wound Surgical Dehiscence

🛡️

Post-Operative Protection

Pre- and post-operative wound management to prevent SSI (Surgical Site Infection), control post-surgical fluid accumulation, and reduce adhesion formation risk in abdominal and thoracic procedures.

SSI Prevention Incision Care Anti-Adhesion

👁️

Ophthalmic Intraoperative Care

Long-term sedation patients lose blink reflex — creating high corneal exposure risk. Hydrogel Eye Patch provides 24-hour sealed moisture hydration. Essential for all sedated and immobile patients.

General Anesthesia ICU Sedation Corneal Protection

💉

Plastic Surgery & Dermatology

Skin graft donor sites, flap procedures, and cosmetic surgery wound management — ensuring optimal aesthetic outcomes with minimal scarring and rapid healing.

Skin Graft Flap Procedure Cosmetic Surgery

🪖

Military & Emergency Trauma

Combat injuries, emergency trauma, and mass casualty scenarios — enabling field-deployable negative pressure therapy for critical wound management in resource-limited settings.

Combat Injury Field Deployment Mass Casualty

🐾

Veterinary Wound Care

VSD and hydrogel dressings are equally effective for veterinary applications — managing post-surgical wounds, traumatic injuries, and chronic wounds in companion and farm animals.

Veterinary Animal Wound Post-Surgical

🏠

Home Care & Remote Treatment

Portable VSD devices enable effective wound management in home care and remote clinical settings — expanding access to advanced wound care beyond hospital environments.

Home Care Remote Clinic Portable VSD

Business Cooperation

Three Major Business Models

Qingshi Bio provides flexible cooperation models tailored to different market needs — enabling global partners to access high-quality wound care products with full technical and regulatory support.

🤝

Distributor Recruitment

We are actively recruiting distributors worldwide. Benefit from exclusive territorial rights, comprehensive marketing support, and competitive pricing — building long-term partnerships for sustainable growth in the wound care market.

Exclusive Territory Marketing Support Competitive Pricing

🏭

OEM/ODM Customization

Full private-label and custom manufacturing services — from product specification adjustment to packaging design. Leverage our NMPA-certified manufacturing facility to build your own wound care brand with confidence.

Private Label Custom Specs Packaging Design

🏥

Hospital GPO Procurement

Direct hospital and Group Purchasing Organization (GPO) supply — streamlined procurement process with full regulatory documentation support. NMPA Class II registration ensures compliance with hospital procurement requirements.

Direct Supply Regulatory Support NMPA Compliant

Research & Development

R&D Capability — Three-Domain Integration

Qingshi Bio allocates 100% of R&D capacity toward three interdependent domains: biomaterial science, wound microenvironment modulation, and controlled-delivery dressing systems — enabling clinical precision that generalist manufacturers cannot replicate.

Biomaterial Science

PVA foam pore architecture optimization (400–600 μm), polyethylene oxide hydrogel crosslink density control, polyurethane film formulation and surface treatment — precision-tuned for therapeutic performance.

Wound Microenvironment

pH-buffered hydrogel systems (pH 7.2 ± 0.2), moisture vapor transmission rate (MVTR) optimization, bioactive component incorporation — engineered for cellular proliferation and granulation.

Delivery System Engineering

Negative pressure distribution modeling, seal integrity monitoring, patient interface comfort engineering — translating material science into clinically reliable therapeutic systems.