Estudo prospectivo randomizado após uso de dreno na artroplastia total do joelho com implante

OBJECTIVE:to compare the laboratorial results of opening suction drainage 6 hours and 12 hours after total knee arthroplasty surgery.METHODS:prospective and randomized study in 88 patients undergoing with total knee arthroplasty in two groups: in one group the opening suction drainage was performed 6 hours (n = 45) after the surgery and in the other 12 hours (n = 43) after the surgery.RESULTS : the outcome was a significant fall in the three laboratorial variables (hemoglobin, red blood cells and hematocrit) between the pre and post-operative in the total sample and in the six and 12 hour opening suction drainage groups. In the group with opening suction drainage after 12 hours, the drainage volume was significantly lower than in the group with opening suction drainage after 6 hours (p = 0.0003). However, no significant difference was observed in the absolute delta of the laboratorial variables between the two groups.CONCLUSION:the opening suction drainage in six and 12 hours did not show significant difference from the laboratorial values although the volume of the blood drained was higher in the opening suction drainage in six hours.OBJETIVO : Comparar os resultados laboratoriais da abertura do dreno seis e 12 horas após a cirurgia de artroplastia total do joelho. MÉTODOS : Estudo prospectivo e randomizado em 88 pacientes tratados com artroplastia total do joelho com implante em dois grupos: um com abertura do dreno seis horas (n = 45) após a cirurgia e outro, 12 horas (n = 43) após a cirurgia.RESULTADOS : Existe uma queda significativa nas três variáveis laboratoriais (hemoglobina, hemácias e hematócrito) entre o pré e o pósoperatório na amostra total e nos grupos de tempo de abertura do dreno às seis e 12 horas. O grupo com tempo de abertura após 12 horas apresentou volume do dreno significativamente menor do que o grupo com tempo de abertura após 6 horas (p = 0,0003). Contudo, não foi verificada diferença significativa no delta absoluto das variáveis laboratoriais entre os dois grupos. CONCLUSÃO : A abertura do dreno em seis e 12 horas não demonstrou diferença significativa dos valores laboratoriais. Porém, o volume de sangue drenado foi maior com abertura do dreno após seis horas.Hospital Santa Teresa Clinical Head and Physician in charge of the Knee Group of Prof. Dr. Donato D'Ângelo Orthopedics and Traumatology ServiceHospital Santa TeresaInstituto Nacional de Traumato-OrtopediaINTOUniversidade Federal de São Paulo (UNIFESP) Escola Paulista de MedicinaUNIFESP, EPMSciEL

Magnetic resonance study on the anatomical relationship between the posterior proximal region of the tibia and the popliteal artery ☆

ABSTRACTOBJECTIVE: To analyze and describe the distance from the popliteal artery to three specific areas of the proximal region of the tibia, with the knee extended, by means of magnetic resonance. METHODS: Images of 100 knees of patients who underwent magnetic resonance examinations were analyzed. The location of the popliteal artery was measured in three different areas of the posterior proximal region of the tibia. The first measurement was made at the level of the knee joint (tibial plateau). The second was 9 mm distally to the tibial plateau. The third was at the level of the anterior tuberosity of the tibia (ATT). RESULTS: The distances between the popliteal artery and the tibial plateau and ATT region were significantly greater in males than in females. The distances between the popliteal artery and the regions 9 mm distally to the tibial plateau and the ATT were significantly greater in the age group over 36 years than in the group ≤36 years. CONCLUSION: Knowledge of the anatomical position of the popliteal artery, as demonstrated through magnetic resonance studies, is of great relevance in planning surgical procedures that involve the knee joint. In this manner, devastating iatrogenic injuries can be avoided, particularly in regions that are proximal to the tibial plateau and in young patients

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data