Search

Purpose: To compare dermal regenerative template (DRT), with and without split-thickness skin-grafting (STSG), and urinary bladder matrix (UBM) for coverage of lower extremity wounds. Methods: A retrospective review of 56 lower extremity wounds treated with either DRT and STSG (DRT-S) (n = 18), DRT only (n = 17), or UBM only (n = 21). Patient characteristics, comorbidities, American Society of Anesthesiology (ASA) classification, injury characteristics, wound characteristics, use of negative pressure wound therapy, surgical details, postoperative care, and failure of primary wound coverage procedure were documented. Results: The DRT group, compared to the DRT-S group, was older [median difference (MD) 17.4 years, 95% confidence interval (CI) 9.1–25.7; p = 0.0008], more diabetic (proportional difference (PD) 54.2%, CI 21.2–76.1%; p = 0.002), had smaller wounds (MD − 91.0 cm2, CI − 125.0 to − 38.0; p = 0.0008), more infected wounds (PD 49.0%, CI 16.1–71.7%; p = 0.009), a shorter length of stay after coverage (MD − 5.0 days, CI − 29.0 to − 1.0; p = 0.005), and no difference in primary wound coverage failure (41.2% vs. 55.6%; p = 0.50). The UBM group, compared to the DRT group, was younger (MD − 6.8 years; CI − 13.5 to − 0.1; p = 0.04), had fewer patients with an ASA > 2 (PD − 35.0%, CI − 55.2% to − 7.0%; p = 0.02), diabetes (PD − 49.2%, CI − 72.4% to − 17.6%; p = 0.003), and had no difference in primary wound coverage failure (36.4% vs. 41.2%; p = 1.0). Failure of primary wound coverage was found to only be associated with larger wound surface areas (MD 22.0 cm2, CI 4.0–90.0; p = 0.01). Conclusions: DRT and UBM coverage had similar rates of primary wound coverage failure for lower extremity wounds. Level of evidence: Diagnostic, Level III. [ABSTRACT FROM AUTHOR]

Purpose: Carpal tunnel (CT) syndrome continues to be a commonly treated hand pathology. We aimed to evaluate several CT injection techniques for (1) spatial accuracy within the CT and (2) risk of median nerve (MN) injury. Our purpose was to evaluate for any significant differences in accuracy of needle placement within the carpal tunnel and final distance between the needle tip and the MN with each technique. Methods: Fifteen fresh frozen cadaveric arms were used for this study. Six different injection techniques for CT injection were performed on each specimen, including palmaris longus, ulnar to flexor carpi radialis, trans-flexor carpi radialis, volar radial, volar ulnar, and direct through the palm techniques. After needle placement, a standard open CT release was performed to assess for accuracy of placement within the CT and measure needle position in relation to the MN and other anatomic structures. Results: Accurate intra-CT needle placement was seen in 91% of injections. While there was no significant difference between injection techniques for distance to nearest tendon (p = 0.1531), the trans-flexor carpi radialis (tFCR), volar radial (VR), and volar ulnar (VU) techniques consistently provided the greatest intra-CT distance from needle tip to median nerve (p = 0.0019). The least incidence of intraneural needle placement was found with the tFCR and VR approaches. Conclusion: All six injection techniques reliably enter the CT space. The lowest risk to the MN was found with tFCR and VR techniques, and we recommend these techniques for safe and effective needle placement to avoid iatrogenic intraneural injection. Level of evidence: Level V: Cadaveric Study. [ABSTRACT FROM AUTHOR]