Local Anesthetic Needles PDF

Local anesthetic needles P RO F E S S O R DR YAS S E R OS MAN Spinal Needle ∙ Spinal needles are essential tools in administering spinal anesthesia. ∙ They come in various types, each designed for specific purposes and patient needs Main types of spinal needles based on its tip : ∙ Differences...

Local anesthetic needles P RO F E S S O R DR YAS S E R OS MAN Spinal Needle ∙ Spinal needles are essential tools in administering spinal anesthesia. ∙ They come in various types, each designed for specific purposes and patient needs Main types of spinal needles based on its tip : ∙ Differences Between Needle Types ∙ Tip Design: Cutting (Quincke) vs. non-cutting (Whitacre, Sprotte, ). ∙ Risk of PDPH: Higher with cutting needles (Quincke) and lower with non-cutting needles (Whitacre, Sprotte, ). ∙ Ease of Insertion: Cutting needles are easier to insert but cause more tissue damage, while non-cutting needles are more challenging to insert but cause less tissue damage. 1. Quincke Needle: ∙ Description: Features a cutting bevel tip. ∙ Advantages: Easier to insert due to the cutting tip. ∙ Disadvantages: Higher risk of post-dural puncture headache (PDPH) due to the larger hole created. 2. Whitacre Needle: ∙ Description: Atraumatic, pencil-point needle with a side hole. ∙ Advantages: Lower risk of PDPH, less tissue damage. ∙ Disadvantages: Slightly more challenging to insert compared to Quincke 3. Sprotte Needle: ∙ Description: Similar to Whitacre but with a longer side hole. ∙ Advantages: Lower risk of PDPH, better cerebrospinal fluid (CSF) flow. ∙ Disadvantages: Can be more difficult to handle due to the longer side hole.  Spinal Needle Sizes and Color Coding ∙ Spinal needles come in various sizes, typically measured by gauge (G), which indicates the needle’s diameter. ∙ The larger the goes number the thinner is the needle so 18-gauge needle diameter is larger than that of a 25-gauge needle. ∙ The thinner the needle is the less likely to cause post spinal headache and pain during administration, but it is more delicate and needs precision for proper usage. ∙ The color-coding system helps quickly identify the gauge of the needle. Spinal needles come in various lengths ∙ Short Needles Often used for pediatric patients ∙ Standard Length Needles ( about 90 mm )Suitable for most adult patients. ∙ Long Needles Used for obese patients or when a deeper reach is necessary. Epidural Anesthesia Needle ∙ Epidural needles are designed to deliver anesthetic into the epidural space, which is the area outside the dural sac that contains the spinal cord and cerebrospinal fluid (CSF). key features: ∙ Size and Gauge: Typically, larger than spinal needles, often ranging from 16G to 18G. ∙ Length: around 8-9 cm, to reach the epidural space. ∙ Tip Design: The most common type is the Tuohy needle, which has a curved, blunt tip to help prevent puncturing the dura mater. ∙ Catheter: Epidural needles are often used to insert a catheter into the epidural space, allowing continuous or intermittent administration of anesthetic. Combined Spinal-Epidural (CSE) Needles ∙ Needle-Through-Needle (NTN) Technique Local Anesthesia Needles ∙ Local anesthesia needles are designed to deliver anesthetic agents to specific areas, numbing the targeted region without affecting the patient’s consciousness  1. Standard Local Anesthesia Needles: ∙ Gauge: Typically range from 25G to 30G. ∙ Length: Varies from short (20 mm) to long (32 mm). ∙ Use: Commonly used in dental procedures, minor surgical interventions, and regional blocks. ∙ Design: Includes a bevel, shaft, hub, syringe adapter, and cartridge penetration end. 2. Ultrasound-Guided Needles: ∙ Gauge: Often 22G to 25G. ∙ Length: Longer needles (up to 100 mm) for deeper tissue access. ∙ Use: Used in procedures requiring precise placement of the anesthetic, such as nerve blocks. ∙ Design: Features echogenic markings or coatings to enhance visibility under ultrasound. Thank You