BACKGROUND This study assessed the effect of bevel direction on the success rate of ultrasound guided radial artery catheterization. METHODS A total of 204 patients requiring radial artery catheterization were randomly divided into bevel-up (n = 102) and bevel-down (n = 102) groups. Success rate, cannulation time, and number of attempts were compared groups. RESULTS In the bevel-down group,...

Bevel tip position and corneal damage during phacoemulsification Recently, Faramarzi et al. reported on bevel-up versus bevel-down phaco tip during phacoemulsification. We disagree with the authors that it was the first study to consider this subject. Other authors have published studies considering the consequences of phaco needle bevel position on corneal endothelial cells during phacoemulsif...

BACKGROUND To reduce injection pain and improve satisfaction, a thinner (29-gauge [29G]), sharper (5-bevel) needle than the 27G/3-bevel needle used previously to inject interferon (IFN) beta-1a, 44 or 22 mcg subcutaneously (sc) three times weekly (tiw), was developed for use in multiple sclerosis (MS). METHODS Two clinical trials in healthy volunteers and five surveys of patients with MS were...

It is a common practice for medical practitioners to use subcutaneous infiltration of lidocaine to alleviate the pain of intravenous cannulation or line insertion. Although previous studies have assessed several factors affecting the pain associated with local anesthetic infiltration, there is a paucity of data on the effects of needle bevel position. In this prospective, randomized, controlled...

BACKGROUND Infrequent but serious complications of transforaminal epidural steroid injection (TFESI) occur due to inadvertent intravascular injections. A few studies reported that the different needle types can influence on the occurrences of intravascular incidence in TFESI. This study prospectively evaluated whether short-bevel needle can reduce the incidences of intravascular injection of TF...

BACKGROUND Multiple factors impact subcutaneous insulin injection pain. Injection devices [e.g., syringe or pen needle (PN)] affect pain due to needle length, diameter, needle polishing and lubrication, and needle tip geometry. METHODS We evaluated a modified 5-bevel PN tip in 32 G × 4 mm 31 G × 5 mm and 8 mm PNs vs the equivalent marketed 3-bevel PNs in laboratory penetration force testing, ...

Three varieties of wheat and knife bevel angles, four levels of moisture content and three shearing speeds of pendulum were considered to determine their effects on the shearing energy of wheat straw. Results showed that the effects of variety, knife bevel angle, moisture content and shearing speed on shearing energy were significant (P<0.01). Shearing energy decreased with decreasing moisture ...

To the Editor: We have previously published an article describing a new approach to the interscalene brachial plexus block (1). This technique uses the bony anatomy of the cervical spine as a landmark for directing the needle to the correct position, with the needle type being a 22gauge B-bevel shielded needle. However, studies are conflicting regarding bevel types and their association with pe...

Intravenous (IV) access is a common medical procedure in pediatrics. During pediatric IV insertion, a small size needle (22-24 gauge, 0.71-0.56 mm OD) with lancet tip is usually used to pierce into the vessel of the pediatric patient [1-3]. Because the veins of children are very thin, IV insertion is usually difficult. If the patient is very young or with other medical complex conditions, for e...