Lidocaine-loaded reduced graphene oxide hydrogel for prolongation of effects of local anesthesia: In vitro and in vivo analyses.

Lidocaine is widely used as a local anesthetic for alleviation of post-operative pain and for management of acute and chronic painful conditions. Although several approaches are currently used to prolong the duration of action, an effective strategy to achieve neural blockage for several hours remains to be identified. In this study, a lidocaine-loaded Pluronic® F68-reduced graphene oxide hydrogel was developed to achieve sustained release of lidocaine. Fourier transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy confirmed the synthesis of Pluronic® F68-reduced graphene oxide. Transmission electron microscopy showed wrinkled, flat nanosheets with micelles attached. The developed hydrogel showed desirable pH, viscosity, adhesiveness, hardness, and cohesiveness for topical application. The ex vivo release study demonstrated the ability of the Pluronic® F68-reduced graphene oxide hydrogel to prolong release up to 10 h, owing to the strong π-π interactions between the graphene oxide and the lidocaine. In comparison with a commercial lidocaine ointment, the developed graphene oxide hydrogel showed sustained anesthetic effect in the radiant heat tail flick test and sciatic nerve block model. Thus, this study demonstrates the potential of using Pluronic® F68-reduced graphene oxide nanocarriers to realize prolonged effects of local anesthesia for effective pain management.

[Clinical analysis of 47 patients with psoriasis arthropathy treated by traditional Chinese medicine syndrome differentiation and integrative medicine].

OBJECTIVE: To analyze the clinical characteristics of psoriasis arthropathy (PA) and to explore the effect of treatment by traditional Chinese medicine (TCM) syndrome differentiation and integrative medicine. METHODS: The initiating characteristics, clinical manifestations, related laboratory and X-ray data as well as the therapeutic efficacy of syndrome dependent TCM and integrative medicine on 47 PA patients were analyzed. RESULTS: Among all the 47 patients, 38 (80.6%) had the skin lesion revealed earlier to joint symptoms, the average time between the appearance of skin lesion and joint symptoms was 9.2 years; joint X-ray abnormality was found in 32 cases (68.1%); and psoriasis nail involvement was found in 33 cases (70.2%). Seventeen patients were treated with TCM alone and obtained satisfactory results, while the other 30 patients, were treated by integrative medicine with the dosage of medicine reduced immediately after symptoms were relieved, and finally cured or improved. CONCLUSION: TCM and integrative medicine are effective in treating PA, with lesser side effects.