IRIMAR DE PAULA POSSO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Cirurgia, Faculdade de Medicina - Docente
LIM/08 - Laboratório de Anestesiologia, Hospital das Clínicas, Faculdade de Medicina
LIM/08 - Laboratório de Anestesiologia, Hospital das Clínicas, Faculdade de Medicina
6 resultados
Resultados de Busca
Agora exibindo 1 - 6 de 6
- Percutaneous sciatic nerve block with tramadol induces analgesia and motor blockade in two animal pain models(2012) SOUSA, A. M.; ASHMAWI, H. A.; COSTA, L. S.; POSSO, I. P.; SLULLITEL, A.Local anesthetic efficacy of tramadol has been reported following intradermal application. Our aim was to investigate the effect of perineural tramadol as the sole analgesic in two pain models. Male Wistar rats (280-380 g; N = 5/group) were used in these experiments. A neurostimulation-guided sciatic nerve block was performed and 2% lidocaine or tramadol (1.25 and 5 mg) was perineurally injected in two different animal pain models. In the flinching behavior test, the number of flinches was evaluated and in the plantar incision model, mechanical and heat thresholds were measured. Motor effects of lidocaine and tramadol were quantified and a motor block score elaborated. Tramadol, 1.25 mg, completely blocked the first and reduced the second phase of the flinching behavior test. In the plantar incision model, tramadol (1.25 mg) increased both paw withdrawal latency in response to radiant heat (8.3 +/- 1.1, 12.7 +/- 1.8, 8.4 +/- 0.8, and 11.1 +/- 3.3 s) and mechanical threshold in response to von Frey filaments (459 +/- 82.8, 447.5 +/- 91.7, 320.1 +/- 120, 126.43 +/- 92.8 mN) at 5, 15, 30, and 60 min, respectively. Sham block or contralateral sciatic nerve block did not differ from perineural saline injection throughout the study in either model. The effect of tramadol was not antagonized by intraperitoneal naloxone. High dose tramadol (5 mg) blocked motor function as well as 2% lidocaine. In conclusion, tramadol blocks nociception and motor function in vivo similar to local anesthetics.
article 49 Citação(ões) na Scopus Sex and Pain Perception and Analgesia(2011) PALMEIRA, Claudia Carneiro de Araujo; ASHMAWI, Hazem Adel; POSSO, Irimar de PaulaPalmeira CCA, Ashmawi HA, Posso IP - Sex and Pain Perception and Analgesia. Sex is an important factor in painful experience modulation. Large volume of evidence shows that experience is different for males and females, as well as the answer to some classes of analgesics. Laboratory experiments suggest that women have a lower pain threshold than men related to pain from noxious stimuli such as heat, cold, pressure and electrical stimulation. Pain is a dynamic phenomenon under the influence of various mechanisms of excitatory and inhibitory control. The differences in pain perception related to sex may be associated with hyperalgesia in women, but also to the hypoactivity of the inhibitory system of pain in females. The purpose of this review besides showing some relationship for gonadal hormones, central nervous system and pain is to provide reference points for the discussion of one of the most intriguing aspects of the pathophysiology of pain: the differences in the presence of painful stimuli related to gender.- Prevalence of Chronic Pain, Treatments, Perception, and Interference on Life Activities: Brazilian Population-Based Survey(2017) SOUZA, Juliana Barcellos de; GROSSMANN, Eduardo; PERISSINOTTI, Dirce Maria Navas; OLIVEIRA JUNIOR, Jose Oswaldo de; FONSECA, Paulo Renato Barreiros da; POSSO, Irimar de PaulaBackground and Objectives. Chronic pain affects between 30% and 50% of the world population. Our objective was to estimate the prevalence of chronic pain in Brazil, describe and compare differences between pain types and characteristics, and identify the types of therapies adopted and the impact of pain on daily life. Methods. Cross-sectional study of a population-based survey with randomized sample from a private database. The interviews were conducted by phone. 78% of the respondents aged 18 years or more agreed to be interviewed, for a total of 723 respondents distributed throughout the country. Independent variables were demographic data, pain and treatment characteristics, and impact of pain on daily life. Comparative and associative statistical analyses were conducted to select variables for nonhierarchical logistic regression. Results. Chronic pain prevalence was 39% and mean age was 41 years with predominance of females (56%). We found higher prevalence of chronic pain in the Southern and Southeastern regions. Pain treatment was not specific to gender. Dissatisfaction with chronic painmanagement was reported by 49% of participants. Conclusion. 39% of interviewed participants reported chronic pain, with prevalence of females. Gender-associated differences were found in intensity perception and interference of pain on daily life activities.
- Once again, the job is done!(2021) POSSO, Irimar de Paula
- Effect of nitrous oxide on fentanyl consumption in burned patients undergoing dressing change(2016) VALE, Arthur Halley Barbosa do; VIDEIRA, Rogerio Luiz da Rocha; GOMEZ, David Souza; CARMONA, Maria Jose Carvalho; TSUCHIE, Sara Yume; FLORIO, Claudia; VANE, Matheus Fachini; POSSO, Irimar de PaulaBackground and objectives: Thermal injuries and injured areas management are important causes of pain in burned patients, requiring that these patients are constantly undergoing general anesthesia for dressing change. Nitrous oxide (N2O) has analgesic and sedative properties; it is easy to use and widely available. Thus, the aim of this study was to evaluate the analgesic effect of N2O combined with fentanyl in burned patients during dressing change. Method: After approval by the institutional Ethics Committee, 15 adult burned patients requiring daily dressing change were evaluated. Patient analgesia was controlled with fentanyl 0.0005% administered by intravenous pump infusion on-demand. Randomly, in one of the days a mixture of 65% N2O in oxygen (O-2) was associated via mask, with a flow of 10 L/min (N2O group) and on the other day only O-2 under the same flow (control group). Results: No significant pain reduction was seen in N2O group compared to control group. VAS score before dressing change was 4.07 and 3.4, respectively, in N2O and control groups. Regarding pain at the end of the dressing, patients in N2O group reported pain severity of 2.8; while the control group reported 2.87. There was no significant difference in fentanyl consumption in both groups. Conclusions: The association of N2O was not effective in reducing opioid consumption during dressing changes.
- Current legislation on medical cannabis. History, movements, trends and counter-tendencies, in the Brazilian territory(2023) MARTINS, Denise do Amaral; POSSO, Irimar de PaulaABSTRACT BACKGROUND AND OBJECTIVES: Cannabis sativa is a plant that has been used by humankind for many years and is in the media spotlight due to its pharmacological features, being considered the great therapeutic option of the century. With the advent of the Drug Law (Lei de Drogas - Law No. 11,343/2006) there was a starting point for the situation of cannabis in Brazil. Thus, the objective of this narrative review was to discuss information about legal issues regarding cannabis in the Brazilian territory. CONTENTS: The Collegiate Directorate Resolution (Resolução da Diretoria Colegiada - RDC) No. 327 of December 2019, published by Brazilian Health Surveillance Agency (Agência Nacional de Vigilância Sanitária - ANVISA), provides on the procedures for granting health authorization for manufacturing and importation, as well as establishes requirements for marketing, prescription, storage, monitoring and surveillance of cannabis products for medicinal purposes to human use. The Bill of Law (Projeto de Lei - PL) No. 399/2015, proposed to amend article 2 of Law No. 11,343, of August 23, 2006, to enable planting and marketing of drugs containing extracts, substrates or parts of the cannabis plant. CONCLUSION: Cannabis cultivation in Brazil would make a great contribution not only to the pharmaceutical industry, but also to the agricultural industry, generating jobs and reducing raw material costs for drugs. However, the slow pace of Brazilian politics would be an obstacle. There is a need for more consolidated and specific legislation to regulate cannabis.