Choosing an endobronchial tube starts with the clinical plan for lung isolation, the patient’s airway anatomy, and the equipment available—not with a size chart alone. For many adult thoracic procedures, clinicians consider a left- or right-sided double-lumen tube (DLT); a bronchial blocker used with a single-lumen tube may be more suitable in other situations. DLT sizes are commonly labeled in French (Fr), but dimensions vary by manufacturer, so the product’s instructions for use (IFU) should be checked before selection. This guide explains the main options, how to compare sizes, and what buyers should confirm with a supplier.
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This guide is intended for medical-device distributors, hospital procurement teams, operating-room planners, and clinicians evaluating endobronchial tube options. It provides a product-selection framework rather than patient-specific medical advice or an insertion protocol. The treating anesthesia team should make clinical decisions based on the individual patient, procedure, and local practice. Buyers should confirm that any selected device is appropriate for the intended market and use.
An endobronchial tube is an airway device used to provide access to or ventilation of a bronchus, depending on its design and the clinical plan. In thoracic anesthesia, the term often refers to a DLT, which has separate tracheal and bronchial lumens and cuffs. This arrangement can support lung isolation, allowing ventilation of one lung while the other is managed for the procedure. A bronchial blocker is a different device option: it is advanced through or alongside a single-lumen airway tube to block a bronchus.
A left-sided DLT places its bronchial portion in the left main bronchus. It is commonly used for many thoracic procedures because the left main bronchus is generally longer than the right, which can provide more room for positioning. However, anatomy and the surgical approach can make another option more appropriate. The clinician must verify suitability and placement according to the device IFU and institutional practice.
A right-sided DLT is designed for placement in the right main bronchus and may be considered when a left-sided tube is unsuitable, such as when the left main bronchus is involved in the planned operation. Right bronchial anatomy includes the right upper-lobe bronchus, so tube design and positioning require particular attention. Buyers should review the device’s intended use and distinguishing features rather than treating left- and right-sided tubes as interchangeable. Selection and confirmation of placement are clinical responsibilities.
A bronchial blocker can provide lung isolation while allowing use of a single-lumen tracheal tube. This option may be considered when a DLT is not the preferred approach, including some cases involving a difficult airway or a need to retain an existing single-lumen tube. Some airway systems combine a single-lumen tube with a blocker feature, while other blockers are separate products. Confirm compatibility, sizing, and required accessories for the specific system.
DLT size is commonly expressed in French units, abbreviated Fr. As a unit conversion, 1 Fr equals approximately 0.33 mm of nominal outer diameter, but that conversion does not establish the dimensions of every tube component or predict an individual patient’s fit. Adult DLT product ranges often include sizes from approximately 26 Fr to 41 Fr, although available sizes and dimensions vary by manufacturer and product line. Always use the manufacturer’s size chart and IFU, rather than relying on the French label alone.
| Selection factor | What to review | Why it matters |
|---|---|---|
| Tube type | Left-sided DLT, right-sided DLT, or blocker-based system | Must align with the procedure, anatomy, and clinical plan. |
| Nominal size | Available Fr sizes and manufacturer sizing guidance | The label alone does not provide a complete fit assessment. |
| Dimensions and design | Outer diameter, length, lumen configuration, cuffs, and connectors | Design details can affect compatibility and intended use. |
| Materials and packaging | Material declaration, sterile status, pack quantity, and shelf-life information | Supports clinical handling, storage, and procurement review. |
There is no single French size that can be recommended for every patient of a particular height or sex. Clinicians may consider patient anatomy, available imaging, airway assessment, the required procedure, and their experience with the device. For procurement teams, the practical goal is to maintain a size range that matches the facility’s expected case mix, subject to clinical policy. If replacing a current product, compare actual dimensions and connector configuration instead of matching the printed Fr number alone.
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Start by identifying whether the clinical team expects to use a DLT or a blocker with a single-lumen tube. Then establish whether a left- or right-sided design is required for the planned procedure. These decisions should come from the responsible clinical team, not from the purchasing department alone. The supplier can help clarify product configurations once the intended option is known.
Request the manufacturer’s size chart, dimensional information, and IFU for each candidate product. Check the complete device configuration, including lumens, cuffs, connectors, and any included accessories. Where a blocker is involved, verify compatibility with the airway tube and other components specified for the system. Do not assume that products with similar labels have identical dimensions or fit.
Confirm the material description, intended use, sterility status, packaging configuration, storage requirements, and shelf-life details provided for the product. Requirements differ by destination market, so buyers should request the documentation needed for their own regulatory and quality review. Do not treat a supplier statement as a substitute for checking the applicable product labeling and market requirements. Record the approved product reference and specification for repeat orders.
Unit price can depend on the device type, size mix, packaging, order volume, destination, and agreed supply terms. MOQ and lead time are likewise order-specific and should be confirmed in a written quotation rather than assumed from a general catalog. Ask whether mixed sizes can be included in an order and clarify how product changes or forecast updates are handled. For planning, request a quotation that identifies each size, quantity, packaging unit, delivery terms, and validity period.
A useful supplier discussion should cover more than price. Ask for current product specifications, size availability, packaging details, and the documents required for your quality and regulatory review. Clarify MOQ, production or dispatch lead time, shipping terms, and how size-specific orders are identified. If your team is evaluating alternatives, request a side-by-side specification comparison based on the products under consideration.
Tuoren Medical works with buyers seeking medical-device supply options, including endobronchial tube products. To help us respond clearly, include the intended product type, target size range, estimated order quantity, destination market, and any required packaging or documentation details. We can then discuss product specifications and applicable commercial terms for your inquiry. Clinical suitability should still be confirmed by the responsible healthcare professionals using the product labeling and local requirements.
The right endobronchial tube choice depends on the planned lung-isolation approach, airway anatomy, device design, and clinical judgment. For procurement, begin by confirming whether the requirement is for a left- or right-sided DLT or a blocker-based system, then compare manufacturer-specific dimensions and compatibility rather than relying on Fr size alone. Next, verify documentation, packaging, MOQ, and lead time for the destination market. Share those requirements with Tuoren Medical to request product information and a tailored quotation for your evaluation.
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