Literally, an epidural needle is simply a needle that is placed into the epidural space. To provide continuous epidural analgesia or anesthesia, a small hollow catheter may be threaded through the epidural needle into the epidural space, and left there while the needle is removed. There are multiple types of epidural needles as well as catheters, but in modern practice in developed nations, disposable materials are used to ensure sterility.
Epidural needles are designed with a curved tip to help prevent puncture of the dural membrane. But following accidental dural puncture, headache occurs in up to 85% of patients causing significant perioperative morbidity.[1] However, in case of inadvertent dural perforation, the incidence of headache can be lowered by identifying the epidural space with the needle bevel oriented parallel to the longitudinal dural fibers which limits the size of the subsequent dural tear.[2]
Close-up of needle and catheter tip, showing the curved end at the needle's tip. The needle features an anti-coring curve at its tip designed to cause a catheter passing through the needle's lumen to exit laterally at a 45 degree angle.
Other Epidural Needles : Other less popular types are the Wagner needle (1957), the Cheng needle(1958), the Crawley needle (1968), the Foldes needle (1973), and the Bell needle (1975)—all variants of the Huber design with a blunted tip of varying sharpness.
Variants like the Brace needle, a Crawford variant; the Lutz epidural needle (1963), with a pencil-point design for single-shot epidural use; the Scott needle (1985), a Tuohy needle with a Luer lock hub; and the Eldor needle (1993), designed for use with combined spinal epidural anesthesia.
Historyedit
Though Ralph L. Huber (1915–2006), a Seattle dentist, was the inventor of this needle in 1940, it is known in the name of Edward Boyce Tuohy (1908–1959), a 20th-century U.S anesthesiologist who first popularized it in 1945.[4]
Referencesedit
^MacArthur, C; Lewis, M; Knox, EG (April 3, 1993). "Accidental dural puncture in obstetric patients and long term symptoms". BMJ. 306 (6882): 883–5. doi:10.1136/bmj.306.6882.883. PMC1677341. PMID 8490410.
^Norris, MC; Leighton, BL; DeSimone, CA (May 1989). "Needle bevel direction and headache after inadvertent dural puncture". Anesthesiology. 70 (5): 729–31. doi:10.1097/00000542-198905000-00002. PMID 2655500.
^Frölich, MA; Caton, D (July 2001). "Pioneers in epidural needle design". Anesthesia and Analgesia. 93 (1): 215–20. doi:10.1097/00000539-200107000-00043. PMID 11429369.
^Lubisich, JW (July 2004). "Ralph L. Huber, DMD: forgotten inventor of the "Tuohy" needle". Journal of the History of Dentistry. 52 (2): 75–9. PMID 15293720.
Further readingedit
"The Evolution of Spinal and Epidural Needles : From the Origins to the Current". Cothon.Net.
Frölich, MA; Caton, D (July 2001). "Pioneers in epidural needle design". Anesthesia and Analgesia. 93 (1): 215–20. doi:10.1097/00000539-200107000-00043. PMID 11429369.
December 15, 2023
tuohy, needle, this, article, includes, list, general, references, lacks, sufficient, corresponding, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, 2013, learn, when, remove, this, template, message, tuohy, need. This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations May 2013 Learn how and when to remove this template message A Tuohy tOO ee needle is a hollow hypodermic needle very slightly curved at the end suitable for inserting epidural catheters Tuohy needleA 16G Portex Tuohy needle and epidural catheter Large rule marks 1 cm apart UsesDrug deliveryRelated itemsHypodermic needle Contents 1 Epidural needle 1 1 Types 2 History 3 References 4 Further readingEpidural needle editLiterally an epidural needle is simply a needle that is placed into the epidural space To provide continuous epidural analgesia or anesthesia a small hollow catheter may be threaded through the epidural needle into the epidural space and left there while the needle is removed There are multiple types of epidural needles as well as catheters but in modern practice in developed nations disposable materials are used to ensure sterility Epidural needles are designed with a curved tip to help prevent puncture of the dural membrane But following accidental dural puncture headache occurs in up to 85 of patients causing significant perioperative morbidity 1 However in case of inadvertent dural perforation the incidence of headache can be lowered by identifying the epidural space with the needle bevel oriented parallel to the longitudinal dural fibers which limits the size of the subsequent dural tear 2 nbsp Close up of needle and catheter tip showing the curved end at the needle s tip The needle features an anti coring curve at its tip designed to cause a catheter passing through the needle s lumen to exit laterally at a 45 degree angle Types edit Types of epidural needles include 3 The Crawford Needle The Tuohy Needle The Hustead Needle The Weiss Needle The Sprotte Spezial Needle Other Epidural Needles Other less popular types are the Wagner needle 1957 the Cheng needle 1958 the Crawley needle 1968 the Foldes needle 1973 and the Bell needle 1975 all variants of the Huber design with a blunted tip of varying sharpness Variants like the Brace needle a Crawford variant the Lutz epidural needle 1963 with a pencil point design for single shot epidural use the Scott needle 1985 a Tuohy needle with a Luer lock hub and the Eldor needle 1993 designed for use with combined spinal epidural anesthesia History editThough Ralph L Huber 1915 2006 a Seattle dentist was the inventor of this needle in 1940 it is known in the name of Edward Boyce Tuohy 1908 1959 a 20th century U S anesthesiologist who first popularized it in 1945 4 References edit MacArthur C Lewis M Knox EG April 3 1993 Accidental dural puncture in obstetric patients and long term symptoms BMJ 306 6882 883 5 doi 10 1136 bmj 306 6882 883 PMC 1677341 PMID 8490410 Norris MC Leighton BL DeSimone CA May 1989 Needle bevel direction and headache after inadvertent dural puncture Anesthesiology 70 5 729 31 doi 10 1097 00000542 198905000 00002 PMID 2655500 Frolich MA Caton D July 2001 Pioneers in epidural needle design Anesthesia and Analgesia 93 1 215 20 doi 10 1097 00000539 200107000 00043 PMID 11429369 Lubisich JW July 2004 Ralph L Huber DMD forgotten inventor of the Tuohy needle Journal of the History of Dentistry 52 2 75 9 PMID 15293720 Further reading edit The Evolution of Spinal and Epidural Needles From the Origins to the Current Cothon Net Frolich MA Caton D July 2001 Pioneers in epidural needle design Anesthesia and Analgesia 93 1 215 20 doi 10 1097 00000539 200107000 00043 PMID 11429369 Retrieved from https en wikipedia org w index php title Tuohy needle amp oldid 1181502737, wikipedia, wiki, book, books, library,
