Echo Tuohy Echogenic Cannula
Product Specification Product Show During epidural block, skin to epidural space distance (SED) and posterior epidural space distance (PED) are measures that can help reduce the unintended penetration of the dura and damage to neural structures. Knowing these distances is also important for the...
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Product Specification
Product name | Echo Tuohy Echogenic Cannula |
Material | Stainless steel, NiTi, etc. |
| Properties | Injection & Puncture Instrument |
| Needle Size | 14G, 15G, 16G, 17G, 18G, 19G, 20G, 21G, 22G, 23G, 24G, 25G, 26G, 27G |
| Needle Length | 2"–6" lengths Custom sizes available upon request. |
| Type | Quincke Point or Pencil Point |
Custom feature | According to your 2D/3D Drawing or sample provided |
Package | Standard carton or according to customer's requirement |
Product Show
During epidural block, skin to epidural space distance (SED) and posterior epidural space distance (PED) are measures that can help reduce the unintended penetration of the dura and damage to neural structures. Knowing these distances is also important for the success rate of epidural block. PED is a measure of epidural space depth, which is especially important for the CSE puncture puncture (NTN) technique. Underestimating this distance (the short extension of the spinal needle through the epidural needle) will result in a higher incidence of spinal block failure.
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Echo Tuohy Echogenic Cannula
Any non-midline approach also increases the risk of not reaching the subarachnoid space because of the triangular shape of the dural sac with the top pointing dorsally. Overestimating PED results in excessive protrusion of the spinal needle, which may increase the risk of nerve damage. These distances were measured using a variety of methods, including magnetic resonance imaging (MRI), computed tomography (CT), ultrasound, and the CSE tip-to-tip distance or the amount of spinal cord needle protrusion beyond the Tuohy needle. Based on detailed records of 3200 cases, the distance from SED was usually 4 cm (50%) and 4-6 cm in 80% of the population. The width of the PED varies with the level of the vertebral body, being widest in the mid-lumbar region (5-6 mm) and descending toward the cervical column. In the middle thoracic segment, the midline is 3-5 mm, narrowing laterally. In the lower cervical region, the midline is only 1.5-2 mm. These Spaces were also correlated with weight/height ratio and body mass index (BMI). Based on these measures, the current spinal needle protrusion design varies between the epidural needle pitch of 10 and 15mm. Learn more about functional neuroaxis anatomy.
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