An epidural anesthesia catheter is a thin, flexible tube advanced through a Tuohy needle into the epidural space — the potential space between the dura mater and the ligamentum flavum within the spinal canal. Once positioned, the catheter serves as a continuous conduit for delivering local anesthetic or analgesic agents directly to the nerve roots exiting the spinal cord, producing segmental sensory and motor blockade without the systemic distribution associated with intravenous administration.
The epidural route is used across a wide range of clinical scenarios: labor analgesia, cesarean section, major abdominal and thoracic surgery, lower limb orthopedic procedures, and postoperative pain management. In each setting, catheter design directly affects how reliably the clinician can place and maintain the device, how predictably the drug distributes within the epidural space, and how safely the catheter can be managed across multiple dosing cycles.
A disposable epidural catheter is intended for single-patient, single-procedure use. It is supplied sterile and discarded after the procedure or course of analgesia is complete. This single-use design eliminates the reprocessing steps — cleaning, inspection, re-sterilization — that reusable devices require, and removes the reprocessing-related variables that can compromise sterility or mechanical integrity between uses.
The CE Certified Epidural Anesthesia Catheter from Zhejiang Sujia Medical Device Co., Ltd. represents current best practice in single-use epidural catheter design, combining wire reinforcement, precision depth marking, pre-attached connector hardware, and CE certification into a product configured for routine clinical use across international markets.
CE marking on a medical device indicates that the product meets the essential requirements of the applicable European Union directives and regulations. For an epidural anesthesia catheter, the relevant framework is the EU Medical Device Regulation (MDR) 2017/745, which replaced the earlier Medical Device Directive (MDD 93/42/EEC). Products that obtained CE certification under the MDD prior to the MDR transition date carry valid certification during the MDR transitional period per Article 120 of the regulation.
An epidural catheter is classified as a Class IIa or Class IIb medical device under EU MDR Annex VIII rules — the classification depends on whether it is intended for short-term use (greater than 60 minutes, up to 30 days) or continuous use, and whether it contacts the central nervous system or circulatory system. Epidural catheters used for extended postoperative analgesia (24–72 hours continuous infusion) typically fall under Class IIb due to invasive use in direct contact with the central nervous system environment, requiring conformity assessment through a Notified Body.
The CE mark itself appears on the device label alongside the four-digit identification number of the Notified Body that conducted the conformity assessment. Procurement officers sourcing for EU-facing markets should verify both the presence of CE marking and the Notified Body number — CE self-declaration without Notified Body involvement is not valid for Class IIa or higher devices.
ISO 13485 Quality Management System
Alongside CE marking, ISO 13485:2016 certification is the recognized quality management system standard for medical device manufacturing globally. It specifies requirements for design and development controls, production process validation, traceability, post-market surveillance, and corrective and preventive action (CAPA) processes. For a hospital procurement department or distribution partner evaluating a new epidural catheter supplier, ISO 13485 certification provides documented evidence that the manufacturer operates under a controlled quality framework — not simply that individual products have passed end-of-line testing.
Zhejiang Sujia Medical Device Co., Ltd. has held ISO 9001 quality management certification since 2003 and CE product certification since 2004, establishing over two decades of documented compliance history. The company was among the first batch of enterprises in China to pass NMPA (National Medical Products Administration) GMP pilot acceptance, and holds recognition as a National High-Tech Enterprise. Full company background is available on the Sujia Medical About page.
EO Sterilization (Ethylene Oxide)
Disposable epidural catheters are typically sterilized using ethylene oxide (EO) gas sterilization — the industry standard process for polymer medical devices that cannot withstand the heat and moisture of steam autoclave sterilization. EO sterilization operates at low temperature (typically 37–63°C) and achieves a Sterility Assurance Level (SAL) of 10⁻⁶ per ISO 11135 requirements, meaning the probability of a viable microorganism remaining on a sterilized unit is less than one in one million.
Following EO sterilization, devices undergo aeration to reduce residual ethylene oxide concentration below the limits specified in ISO 10993-7 — the standard governing biological evaluation for residual EO. Compliance with this standard is a specific prerequisite for CE marking of EO-sterilized devices sold in EU markets. EO residual testing results should be available in the technical file supporting CE certification and can be requested by procurement teams conducting supplier qualification.
Wire-Reinforced (Enhanced) Construction
The single most clinically significant design feature of the enhanced epidural catheter is the embedded wire reinforcement within the catheter wall. Standard non-reinforced epidural catheters are susceptible to kinking when advanced through the epidural space, particularly when threading through the curved anatomy at the level of the intervertebral foramen or when the patient flexes the spine after catheter placement. A kinked catheter obstructs drug flow and may require removal and replacement — an additional procedure for the patient and an additional cost and time burden for the clinical team.
Wire reinforcement — typically a stainless steel coil or braid embedded within the catheter wall — provides resistance to kinking and compression while preserving the flexibility needed to navigate the epidural space. The reinforced wall maintains catheter patency across a wider range of patient positioning and movement, which is particularly important in obstetric applications where the patient may need to move between labor positions after epidural placement.
The reinforced design also resists the collapse that can occur when negative intrathoracic pressure is transmitted through the epidural space during breathing, which can intermittently obstruct drug delivery through non-reinforced catheters under specific conditions.
Depth Markings at 1 cm Intervals
Accurate depth tracking during epidural catheter placement is a patient safety requirement. The clinician must know how far the catheter has been advanced through the Tuohy needle and into the epidural space to avoid threading too deeply (risking intrathecal or intravascular migration) or insufficiently (risking inadequate drug distribution or catheter dislodgment).
Depth markings printed or molded at 1 cm intervals along the catheter length give the clinician a direct visual reference at the needle hub and at the skin surface for monitoring the interspinal depth of catheter insertion throughout the procedure and during subsequent care. The markings must be permanently attached — not removable by contact with saline, blood, or skin disinfectant — to maintain legibility throughout the procedure.
Pre-Attached Connector Design
The catheter-to-syringe or catheter-to-infusion-line connection is a recognized point of risk in epidural anesthesia management. A loose or improperly assembled connector can result in accidental disconnection, which may allow contamination of the catheter tip or connector port, loss of the drug being infused, or air entrainment. In labor epidural management, where the catheter may remain in place for many hours and the patient is mobile, connector security is a continuous concern.
The pre-attached connector design on the Sujia epidural catheter eliminates the assembly step at the point of use. The connector is attached at manufacturing under controlled conditions, with a secured, leak-tested junction. This reduces the handling steps required of the clinical team during catheter setup and removes the variability associated with manually assembling separate connector components under time pressure in a clinical environment.
Available Gauges: 17G / 18G / 20G
Gauge selection for an epidural catheter involves a direct tradeoff between catheter rigidity and the size of the Tuohy needle required for placement. Larger gauge (smaller gauge number) catheters are stiffer and thread more predictably; they require a correspondingly larger introducer needle, which increases tissue trauma and post-procedural back pain. Smaller gauge (larger gauge number) catheters require smaller introducer needles, reducing tissue disruption, but are more prone to kinking and may be harder to thread through the epidural space.
The 17G option is preferred in settings where catheter rigidity is prioritized — for example, in obese patients where epidural fat may make catheter threading more difficult, or in high-volume obstetric units where rapid placement is important. The 18G is the most widely used gauge across general and obstetric anesthesia practice, balancing ease of placement with acceptable introducer needle size. The 20G option is used where minimal invasiveness is the priority, typically in thinner patients or pediatric applications where tissue preservation is at a premium.
Offering all three gauges from a single manufacturer and supply chain simplifies procurement and standardization across different clinical departments or patient populations within a single institution.
Single-Use Safety Benefits
The infection control case for single-use epidural catheters is well established in anesthesia literature. Epidural space infection — epidural abscess — is a rare but potentially catastrophic complication that can result in permanent neurological deficit if not diagnosed and treated promptly. The risk profile is determined by both bacterial contamination at the time of procedure and colonization of the catheter during the dwell period. Single-use devices eliminate the reprocessing failure pathway as a contamination source, which is particularly relevant given that reprocessing validation for complex polymer devices with lumens is technically demanding and difficult to assure across repeated cycles.
Beyond infection, single-use design eliminates material fatigue-related failure modes — catheter wall micro-cracking from repeated sterilization, connector degradation from multiple assembly-disassembly cycles, and marking wear that reduces legibility of depth indicators. Each packaged unit is in factory-new condition at the time of use.
Infection Control in Multi-Patient Environments
In high-throughput clinical environments — busy labor suites, operating theater complexes, or intensive care units — the administrative burden of tracking and validating reusable device reprocessing creates process complexity that single-use devices eliminate entirely. The chain of custody from sterile supply to point of use is simpler, the audit trail is clearer, and the error pathway (wrong device reprocessed, incorrect sterilization cycle, missed inspection of catheter integrity) is removed.
Regulatory Acceptance in EU and International Markets
CE-certified disposable epidural catheters have regulatory standing for sale and use in all EU member states and in the approximately 60 non-EU countries that accept CE marking as the basis for market access. For procurement teams in EU hospitals or for distributors supplying EU-facing markets, CE certification is a binary requirement — a product without CE marking cannot legally be placed on the market under the EU MDR framework. This makes CE certification a procurement threshold, not a preference.
Beyond the EU, CE marking is widely recognized as a quality signal in markets across Southeast Asia, the Middle East, Africa, and Latin America where local regulators accept or reference EU conformity as part of their own market access review. Sujia Medical's products reach over 30 countries and regions, with international market sales currently accounting for approximately 10% of total revenues — a base the company is actively expanding through distribution partnerships globally.
Complementing the regional anesthesia product line, Sujia Medical also offers a full pain management product range including disposable infusion pumps, electronic analgesia pumps, and electronically controlled analgesia pumps — relevant for hospitals seeking a single supplier relationship for both epidural placement and post-procedure analgesia management.
Each unit is individually packaged in a hermetically sealed sterile barrier system. The packaging configuration conforms to EN ISO 11607-1 (packaging for terminally sterilized medical devices), which governs barrier material integrity, seal strength, and sterile presentation. Individual packaging ensures that only the unit being used is exposed to the clinical environment, and any remaining units maintain their sterile barrier status.
Shelf life is validated at two years from the date of sterilization. This validation is conducted through accelerated aging studies per ASTM F1980, with real-time aging data used to confirm the accelerated aging equivalence. The two-year validated shelf life gives supply chain managers meaningful inventory flexibility — particularly for distributors managing international logistics where transit and storage time can consume a significant portion of total shelf life if it is shorter.
The product label carries all required EU MDR labeling elements: CE mark with Notified Body number, sterilization method indicator (EO), single-use symbol (2), sterile symbol (STERILE), lot number, manufacturing date, expiry date, manufacturer name and address, and device description. Label compliance is a prerequisite for CE marking and is verified as part of the conformity assessment process.
Proper storage conditions — typically room temperature (15–25°C), away from direct sunlight and high humidity — must be maintained through the distribution chain to preserve both sterile barrier integrity and the physical properties of the catheter material. Storage outside specified conditions can accelerate material aging and should be documented as a nonconformance in any ISO 13485-compliant quality system.
| Parameter | Detail |
|---|---|
| Product Type | Disposable Enhanced Epidural Anesthesia Catheter with Connector |
| Construction | Wire-reinforced (enhanced) flexible catheter |
| Available Gauges | 17G / 18G / 20G |
| Depth Markings | 1 cm interval graduation along full catheter length |
| Connector | Pre-attached, factory-assembled |
| Sterilization Method | Ethylene oxide (EO) |
| Sterility Assurance Level | 10⁻⁶ (SAL) per ISO 11135 |
| Packaging | Individual sterile barrier pack per ISO 11607-1 |
| Shelf Life | 2 years from sterilization date |
| Regulatory Status | CE certified |
| Quality System | ISO 9001 certified (since 2003); CE certified since 2004 |
| Manufacturer | Zhejiang Sujia Medical Device Co., Ltd., Jiaxing, Zhejiang, China |
Zhejiang Sujia Medical Device Co., Ltd. supports OEM and ODM orders for epidural catheter procurement. Customizable elements available to qualifying buyers include product labeling and logo printing for private label supply arrangements, packaging language and regulatory labeling configuration for specific target markets, gauge selection and catheter length specification within validated design parameters, and connector configuration for compatibility with specific infusion systems used in the buyer's target market.
The company operates a Class 100,000 (ISO 8) cleanroom with 110,000 m² of controlled manufacturing space and employs over 180 professional technicians. Annual production capacity supports volume supply for both hospital group direct procurement and international distribution arrangements.
Minimum order quantities (MOQ) are project-dependent and discussed during the initial commercial inquiry. Development timelines for OEM labeling and packaging modification are shorter than for full product design changes — typically a matter of weeks rather than months — because the validated product design itself is not being altered. Buyers with specific market authorization requirements (local translation of labeling, import registration support) are encouraged to discuss these requirements directly during the inquiry stage.
To discuss order quantities, pricing, or customization requirements, contact Sujia Medical at global@zjsj.com.cn or +86-573-82222666, or use the online inquiry form.
What is the difference between a standard and a wire-reinforced (enhanced) epidural catheter?
A standard epidural catheter is made from a single-layer polymer tube. It is flexible but susceptible to kinking when bent beyond a certain radius, particularly in the curved anatomy of the epidural space or when the patient moves after placement. A wire-reinforced catheter has a metal coil or braid embedded in the wall, which resists kinking and compression while retaining clinical flexibility. In practice, wire-reinforced designs are less likely to obstruct during placement or during the catheter dwell period, making them the preferred option in patients where threading difficulty is anticipated or where the catheter will be in place for an extended period.
Is CE certification sufficient for import and sale in non-EU countries?
CE certification alone meets the regulatory threshold for EU market access. For non-EU markets, CE marking is often accepted as a supporting document for local registration but does not automatically confer market authorization. Most countries require a local registration or notification process, the requirements of which vary significantly. Sujia Medical's products currently reach over 30 countries; the company's export experience includes navigating market access requirements across diverse regulatory environments. Buyers targeting specific non-EU markets should discuss local registration requirements during the initial inquiry.
What gauge epidural catheter is most commonly used in obstetric anesthesia?
The 18G catheter is the most widely used in obstetric epidural practice globally, owing to its balance of threading reliability and introducer needle size. The 17G may be preferred in specific institutional protocols or patient populations; the 20G is less common in obstetrics but used in some protocols where minimizing tissue trauma is the primary concern. Gauge selection should be made in coordination with the Tuohy needle gauge that the clinical team is standardized on, as catheter gauge must match the introducer needle inner diameter.
What is the dwell time for a disposable epidural catheter?
Disposable epidural catheters are typically used for single-procedure anesthesia (a few hours) or for postoperative analgesia management (24–72 hours continuous epidural infusion). Extended dwell beyond 72–96 hours is generally not recommended due to increasing infection risk over time and the possibility of catheter colonization even with intact sterile connector management. For chronic pain management applications requiring longer-term epidural drug delivery, a dedicated intrathecal or epidural drug delivery system rather than a standard disposable catheter is the appropriate clinical tool.
Does the pre-attached connector work with standard infusion sets and epidural-specific filters?
Pre-attached connectors are designed to interface with standard Luer-lock or proprietary epidural-specific connector systems as specified. Buyers should confirm connector compatibility with their existing infusion sets, epidural filters, and patient-controlled analgesia systems at the time of procurement inquiry — this is a practical interoperability question that the manufacturer's technical team can address directly.
How is EO residual tested and what are the limits?
After EO sterilization and aeration, residual ethylene oxide and its metabolite ethylene chlorohydrin are tested per ISO 10993-7. Limits are set based on device contact duration and body contact category — for a short-term invasive device like an epidural catheter, the tolerable residual contact limit is tightly controlled. Test reports documenting residual levels below ISO 10993-7 thresholds are part of the CE technical file and can be provided to procurement teams conducting supplier qualification audits.
Zhejiang Sujia Medical Device Co., Ltd. was established in 1992 and holds the distinction of being the originator of the disposable anesthesia puncture kit product category in China, having obtained the foundational patent for this product type in 1994 and beginning commercial manufacture as the first company in China to do so. The company is recognized as one of the top three players in China's anesthesia products manufacturing industry, holds 80+ patents, and has been designated a National High-Tech Enterprise since 2008.
The full product portfolio spans general anesthesia, regional anesthesia, infusion, monitoring, pain management, medical aesthetics, and nursing care categories — covering the breadth of consumable requirements for an anesthesia and perioperative care department from a single supplier relationship.
The company is located at No. 168 Zhenxing Road, Jiaxing, Zhejiang, China. For product inquiries, OEM discussions, or regulatory documentation requests, contact the international sales team at global@zjsj.com.cn or submit an inquiry online.
