Transthecal Metacarpal Block Versus Traditional Digital Block for Painful Finger Procedures in Children
Background: Finger injuries and infections are common presenting problems in the pediatric emergency department. A traditional digital block, requiring at least two injections of anesthetic, is the traditional method of regional anesthesia for many finger procedures. Digital blocks can sometimes be difficult to administer and assess for effectiveness especially in children. A newer procedure, the transthecal metacarpal block, may be easier to administer, and more effective with one injection.
Objective: To determine if the transthecal metacarpal block (MCB) provides superior digit anesthesia in children requiring painful finger procedures as compared to the traditional digital block (TDB).
Methods: A randomized clinical trial comparing the MCB to the TDB will be conducted in an urban, tertiary care pediatric emergency department. Children <18 years of age, presenting to the emergency department with a finger injury or infection, which requires regional anesthesia for repair will be screened for eligibility. Eligible patients, with appropriate consent will be randomized to receive either the MCB or TDB with 1% Lidocaine. The primary outcome, success of the block will be assessed using pinprick testing after a standardized wait time. Secondary outcomes including pain with the block and repair, repairing physician satisfaction, and short-term complications will also be assessed.
Implications: Finding successful methods of anesthesia and pain control are paramount in the pediatric emergency department. In addition, using a type of digital block which is easy to administer, successful, and requires only one injection would give physicians confidence to treat finger injuries in children with regional anesthesia and possibly avoid procedural sedation in some cases. To date, no studies have been published on the efficacy of digital blocks in children. This study will also serve to give baseline success rates for both types of digital blocks.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment
Transthecal Metacarpal Block
The Children's Hospital Of Philadelphia Emergency Department
Children's Hospital of Philadelphia
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00130104
- Information obtained from ClinicalTrials.gov on July 15, 2010
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Medical and Biotech [MESH] Definitions
A painful disability in the hand affecting the finger or thumb. It is caused by mechanical impingement of the digital flexor tendons as they pass through a narrowed retinacular pulley at the level of the metacarpal head. Thickening of the sheath and fibrocartilaginous metaplasia can occur, and nodules can form. (From Green's Operative Hand Surgery, 5th ed, p2137-58).
General or unspecified injuries involving the fingers.
The CARPAL BONES; METACARPAL BONES; and FINGER PHALANGES. In each hand there are eight carpal bones, five metacarpal bones, and 14 phalanges.
Interruption of sympathetic pathways, by local injection of an anesthetic agent, at any of four levels: peripheral nerve block, sympathetic ganglion block, extradural block, and subarachnoid block.
Disease involving the ULNAR NERVE from its origin in the BRACHIAL PLEXUS to its termination in the hand. Clinical manifestations may include PARESIS or PARALYSIS of wrist flexion, finger flexion, thumb adduction, finger abduction, and finger adduction. Sensation over the medial palm, fifth finger, and ulnar aspect of the ring finger may also be impaired. Common sites of injury include the AXILLA, cubital tunnel at the ELBOW, and Guyon's canal at the wrist. (From Joynt, Clinical Neurology, 1995, Ch51 pp43-5)