Catheter manipulation analysis for objective performance and technical skills assessment in transcatheter aortic valve implantation

Purpose Transcatheter aortic valve implantation (TAVI) demands precise and efficient handling of surgical instruments within the confines of the aortic anatomy. Operational performance and dexterous skills are critical for patient safety, and objective methods are assessed with a number of manipulation features, derived from the kinematic analysis of the catheter/guidewire in fluoroscopy video sequences. Methods A silicon phantom model of a type I aortic arch was used for this study. Twelve endovascular surgeons, divided into two experience groups, experts (n=6) and novices (n=6), performed cannulation of the aorta, representative of valve placement in TAVI. Each participant completed two TAVI experiments, one with conventional catheters and one with the Magellan robotic platform. Video sequences of the fluoroscopic monitor were recorded for procedural processing. A semi-automated tracking software provided the 2D coordinates of the catheter/guidewire tip. In addition, the aorta phantom was segmented in the videos and the shape of the entire catheter was manually annotated in a subset of the available video frames using crowdsourcing. The TAVI procedure was divided into two stages, and various metrics, representative of the catheter’s overall navigation as well as its relative movement to the vessel wall, were developed. Results Experts consistently exhibited lower values of procedure time and dimensionless jerk, and higher average speed and acceleration than novices. Robotic navigation resulted in increased average distance to the vessel wall in both groups, a surrogate measure of safety and reduced risk of embolisation. Discrimination of experience level and types of equipment was achieved with the generated motion features and established clustering algorithms. Conclusions Evaluation of surgical skills is possible through the analysis of the catheter/guidewire motion pattern. The use of robotic endovascular platforms seems to enable more precise and controlled catheter navigation

Changes in the total leukocyte and platelet counts in Papuan and non Papuan adults from northeast Papua infected with acute Plasmodium vivax or uncomplicated Plasmodium falciparum malaria

<p>Abstract</p> <p>Background</p> <p>There are limited data on the evolution of the leukocyte and platelet counts in malaria patients.</p> <p>Methods</p> <p>In a clinical trial of chloroquine vs. chloroquine plus doxycycline vs. doxycycline alone against <it>Plasmodium vivax </it>(n = 64) or <it>Plasmodium falciparum </it>(n = 98) malaria, the total white cell (WCC) and platelet (PLT) counts were measured on Days 0, 3, 7 and 28 in 57 indigenous Papuans with life long malaria exposure and 105 non Papuan immigrants from other parts of Indonesia with limited malaria exposure.</p> <p>Results</p> <p>The mean Day 0 WCC (n = 152) was 6.492 (range 2.1–13.4) × 10⁹/L and was significantly lower in the Papuans compared to the non Papuans: 5.77 × 10⁹/L vs. 6.86 × 10⁹/L, difference = -1.09 [(95% CI -0.42 to -1.79 × 10⁹/L), P = 0.0018]. 14 (9.2%) and 9 (5.9%) patients had leukopaenia (<4.0 × 10⁹/L) and leukocytosis (>10.0 × 10⁹/L), respectively. By Day 28, the mean WCC increased significantly (P = 0.0003) from 6.37 to 7.47 × 10⁹/L (73 paired values) and was similar between the two groups. Ethnicity was the only WCC explanatory factor and only on Day 0.</p> <p>The mean Day 0 platelet count (n = 151) was 113.0 (range 8.0–313.0) × 10⁹/L and rose significantly to 186.308 × 10⁹/L by Day 28 (P < 0.0001). There was a corresponding fall in patient proportions with thrombocytopaenia (<150 × 10⁹/L): 119/151 (78.81%) vs. 16/73 (21.92%, P < 0.00001). Papuan and non Papuan mean platelet counts were similar at all time points. Only malaria species on Day 0 was a significant platelet count explanatory factor. The mean D0 platelet counts were significantly lower (P = 0.025) in vivax (102.022 × 10⁹/L) vs. falciparum (122.125 × 10⁹/L) patients.</p> <p>Conclusion</p> <p>Changes in leukocytes and platelets were consistent with other malaria studies. The Papuan non Papuan difference in the mean Day 0 WCC was small but might be related to the difference in malaria exposure.</p

Natural healers: a review of animal assisted therapy and activities as complementary treatment for chronic conditions Curadores naturales: una revisión de la terapia y actividades asistidas por animales como tratamiento complementar de enfermedades crónicas Curadores naturais: uma revisão da terapia e atividades assistidas por animais como tratamento complementar de doenças crônicas

The primary objective of this review is to synthesize the existing literature on the use of animal-assisted therapy and activity (AAT/A) as complementary treatment among people living with chronic disease and to discuss the possible application of this practice among children living with HIV. Relevant databases were searched between March 10 and April 11, 2011, using the words: animal assisted therapy or treatment and chronic conditions or diseases. Thirty-one articles were found and 18 followed the inclusion and exclusion criteria. Research suggests that AAT/A is effective for different patient profiles, particularly children. Interaction with dogs has been found to increase positive behaviors, such as sensitivity and focus, in children with social disabilities. Decreased levels of pain have also been reported among child patients as a result of AAT/A. More research should be done in the area of children living with chronic diseases that require strict adherence to treatment, such as HIV, and on AAT/A's prospective use as an educational tool to teach children about the importance of self-care for their medical conditions.<br>El objetivo de esta revisión fue describir la literatura existente sobre el uso de terapia y actividades asistidas por animales (AAT/A), como terapia coadyuvante en personas viviendo con enfermedades crónicas, y discutir la posible aplicación de esa práctica en niños que viven con SIDA. La información fue buscada en bancos de datos entre 10 de marzo y 11 de abril de 2011, usando las palabras: terapia asistida por animales o tratamiento y condiciones crónicas o enfermedades. Treinta y uno artículos fueron encontrados y 18 siguieron los criterios de inclusión y exclusión. La pesquisa sugiere que AAT/A es eficaz para pacientes con diferentes perfiles, especialmente para niños. Se descubrió que la interacción con perros incrementa comportamientos positivos como aumento de la sensibilidad y atención en los niños con deficiencia social. La reducción en los niveles de dolor también fue relatada en niños como resultado de la AAT/A. Más investigaciones deben ser hechas en el área de niños que viven con enfermedades crónicas que exigen adhesión rigurosa al tratamiento, tales como SIDA, y el uso prospectivo de la AAT/A como herramienta educacional para enseñar los niños sobre la importancia del autocuidado para sus condiciones médicas.<br>O objetivo desta revisão é descrever a literatura existente sobre o uso de terapia e atividades assistidas por animais (AAT/A) como terapia adjuvante em pessoas vivendo com doenças crônicas e discutir a possível aplicação desta prática em crianças que vivem com HIV. A informação foi buscada em bancos de dados entre 10 de março e 11 de abril de 2011, usando as palavras: terapia assistida por animais ou tratamento e condições crônicas ou doenças. Trinta e um artigo foram encontrados e 18 seguiram os critérios de inclusão e exclusão. A pesquisa sugere que AAT/A é eficaz para pacientes com diferentes perfis, especialmente para crianças. Descobriu-se que a interação com cães incrementa comportamentos positivos como aumento da sensibilidade e atenção nas crianças com deficiência social. A redução nos níveis de dor também foi relatada em crianças como resultado da AAT/A. Mais pesquisas devem ser feitas na área de crianças que vivem com doenças crônicas que exigem adesão rigorosa ao tratamento, tais como HIV, e o uso prospectivo da AAT/A como uma ferramenta educacional para ensinar às crianças sobre a importância do autocuidado para suas condições médicas