Clinical Summary: SIGVARIS Premium Cotton Class 2 Open Toe Calf (Series 230, Style AD) is a medical-grade graduated compression stocking delivering 23-32 mmHg ankle pressure in the calf (A-D) length with an open-toe design. The interior Swiss cotton knit provides moisture-wicking against the skin while a durable blended outer fibre structure maintains calibrated graduated compression. Indicated for chronic venous insufficiency (CEAP C3-C5), moderate to severe varicose veins, post-sclerotherapy management, and prevention of recurrent venous leg ulcers in ambulatory patients.
Product Overview
The SIGVARIS Cotton 230 Series is manufactured in Switzerland by SIGVARIS AG under RAL-GZ 387/1 German medical compression certification. Class 2 (Kompressionsklasse 2) provides graduated compression of 23-32 mmHg at the ankle, decreasing progressively up the leg according to the Laplace principle, which accelerates venous return in patients with compromised calf muscle pump function or valvular incompetence of the superficial or deep venous system.
The A-D (ad genu) calf length terminates two finger-widths below the popliteal crease. The open-toe configuration is selected for patients with forefoot pathology, toe deformity, peripheral neuropathy requiring daily skin inspection, or footwear fit constraints. The interior-cotton knit structure positions mercerised Swiss cotton against the skin for thermal comfort and transepidermal moisture transport, while the external blended synthetic fibres carry the elastomeric load required to maintain calibrated interface pressures across the recommended 6-month service life.
Specifications
| Manufacturer |
SIGVARIS AG, Winterthur, Switzerland |
| Series / Style |
Cotton 230 Series, Style AD (A-D calf length) |
| Compression Class |
CCL 2 (Class 2), 23-32 mmHg at the ankle, graduated |
| Toe Configuration |
Open toe |
| Material Composition |
Interior: Swiss cotton. Exterior: polyamide and elastane blend |
| Sizing System |
SIGVARIS size chart S, M, L, XL; short, normal, long leg lengths |
| Latex Content |
Latex-free |
| Regulatory |
RAL-GZ 387/1 certified, CE marked (EU MDR 2017/745 Class I), HSA Singapore listed medical device |
| Service Life |
6 months with proper laundering (recommended: machine wash 30-40°C, no fabric softener, air dry) |
| Packaging |
One pair per retail box |
Clinical Indications
- Chronic venous insufficiency CEAP clinical classes C3 (oedema), C4 (skin changes), C5 (healed ulcer)
- Moderate to severe primary or secondary varicose veins
- Post-sclerotherapy or post-endovenous ablation compression (per ESVS 2022 guideline)
- Post-thrombotic syndrome following proximal deep venous thrombosis
- Pregnancy-related venous symptoms when Class 2 is clinically indicated
- Long-haul air travel prophylaxis in patients with established venous disease
Frequently Asked Questions
Q: Why choose the cotton variant over a standard synthetic compression stocking?
A: The interior-cotton knit reduces pruritus and contact irritation reported by patients with atopic dermatitis, xerotic skin, or long-term compression wearers, without compromising calibrated interface pressures required by RAL-GZ 387/1.
Q: When is open toe preferred over closed toe?
A: Open toe is indicated when the patient has hallux valgus, hammer toes, diabetic foot surveillance requirements, fungal nail disease under treatment, or where closed toe restricts appropriate shoe fit. Closed toe is preferred for maximum distal compression and cold-foot complaints.
Q: How should the stocking be fitted for optimal compression?
A: Measurement of ankle circumference (cB), calf circumference (cC), and A-D length must be taken in the morning before oedema accumulates. Size selection follows the SIGVARIS size chart; off-size dispensing reduces compression accuracy and may cause tourniquet effect at the proximal band.
Q: What are the contraindications?
A: Absolute contraindications include advanced peripheral arterial disease (ABPI < 0.5), decompensated cardiac failure, septic phlebitis, and severe diabetic microangiopathy. Relative contraindications include ABPI 0.5-0.8, peripheral neuropathy, and fragile skin requiring clinician-supervised application.
Q: Is this registered for sale in Singapore?
A: Yes. SIGVARIS compression stockings are listed with the Health Sciences Authority (HSA) Singapore under the medical devices register. EMIS is an authorised distributor and supplies hospitals, polyclinics, vascular surgeons, and community pharmacies across Singapore.
