Assessment of the impedance cardiogram recorded by an automated external defibrillator during clinical cardiac arrest

OBJECTIVE: To assess the impedance cardiogram recorded by an automated external defibrillator during cardiac arrest to facilitate emergency care by lay persons. Lay persons are poor at emergency pulse checks (sensitivity 84%, specificity 36%); guidelines recommend they should not be performed. The impedance cardiogram (dZ/dt) is used to indicate stroke volume. Can an impedance cardiogram algorithm in a defibrillator determine rapidly circulatory arrest and facilitate prompt initiation of external cardiac massage?

DESIGN: Clinical study.

SETTING: University hospital.

PATIENTS: Phase 1 patients attended for myocardial perfusion imaging. Phase 2 patients were recruited during cardiac arrest. This group included nonarrest controls.

INTERVENTIONS: The impedance cardiogram was recorded through defibrillator/electrocardiographic pads oriented in the standard cardiac arrest position.

MEASUREMENTS AND MAIN RESULTS: Phase 1: Stroke volumes from gated myocardial perfusion imaging scans were correlated with parameters from the impedance cardiogram system (dZ/dt(max) and the peak amplitude of the Fast Fourier Transform of dZ/dt between 1.5 Hz and 4.5 Hz). Multivariate analysis was performed to fit stroke volumes from gated myocardial perfusion imaging scans with linear and quadratic terms for dZ/dt(max) and the Fast Fourier Transform to identify significant parameters for incorporation into a cardiac arrest diagnostic algorithm. The square of the peak amplitude of the Fast Fourier Transform of dZ/dt was the best predictor of reduction in stroke volumes from gated myocardial perfusion imaging scans (range = 33-85 mL; p = .016). Having established that the two pad impedance cardiogram system could detect differences in stroke volumes from gated myocardial perfusion imaging scans, we assessed its performance in diagnosing cardiac arrest. Phase 2: The impedance cardiogram was recorded in 132 "cardiac arrest" patients (53 training, 79 validation) and 97 controls (47 training, 50 validation): the diagnostic algorithm indicated cardiac arrest with sensitivities and specificities (+/- exact 95% confidence intervals) of 89.1% (85.4-92.1) and 99.6% (99.4-99.7; training) and 81.1% (77.6-84.3) and 97% (96.7-97.4; validation).

CONCLUSIONS: The impedance cardiogram algorithm is a significant marker of circulatory collapse. Automated defibrillators with an integrated impedance cardiogram could improve emergency care by lay persons, enabling rapid and appropriate initiation of external cardiac massage.

A influência da massagem na sensação retardada de desconforto muscular

Introdução: Apesar dos muitos estudos sobre a temática da sensação retardada de desconforto muscular, atualmente, ainda se discute a explicação dos mecanismos subjacentes a esta condição clínica, bem como, a sua prevenção e tratamento. A literatura sugere a massagem como uma das formas de terapia, contudo, os estudos têm mostrado resultados controversos. Objetivo: Verificar se a massagem aplicada 2 horas após um protocolo de exercício excêntrico tem influência na sensação retardada de desconforto muscular, bem como, se o seu efeito varia dependendo do tempo de aplicação. Métodos: 21 participantes (23,62±1,32 anos; 76,95±12,17 kg; 174,71±4,78 cm; 25,25±4,26 Kg/m 2) foram divididos em três grupos. Foi avaliada a dor, força muscular e a perimetria antes, e 2h, 24h, 48h, e 72h após um protocolo de exercício constituído por três séries de dez repetições de contrações excêntricas dos isquiotibiais do membro dominante, com 80% da força máxima, a uma velocidade constante de 60º/s, numa amplitude entre 0º e 80º, utilizando o dinamómetro isocinético Biodex System 4. A massagem foi efetuada 2 horas após o exercício em dois grupos experimentais com durações diferentes, sendo o terceiro grupo de controlo. Para identificar diferenças entre os grupos no momento inicial e na variável diferença entre o momento inicial e os restantes momentos, recorreu-se ao teste de Kruskal-Wallis, seguido de uma análise Post-Hoc através do teste de Dunn com um nível de significância de 0,05. Resultados: Verificou-se que a massagem teve efeito na redução da dor e na perimetria. Relativamente à força não foram encontradas alterações significativas. Conclusão: Os resultados mostraram que a massagem aplicada 2 horas após o exercício excêntrico, independentemente da duração utilizada, teve efeito na redução da dor, mas não na força muscular. Na perimetria apesar de haver alterações, estas não foram consideradas relevantes.

Stepwise evaluation of unexplained syncope in a large ambulatory population.

BACKGROUND: Up to 60% of syncopal episodes remain unexplained. We report the results of a standardized, stepwise evaluation of patients referred to an ambulatory clinic for unexplained syncope. METHODS AND RESULTS: We studied 939 consecutive patients referred for unexplained syncope, who underwent a standardized evaluation, including history, physical examination, electrocardiogram, head-up tilt testing (HUTT), carotid sinus massage (CSM) and hyperventilation testing (HYV). Echocardiogram and stress test were performed when underlying heart disease was initially suspected. Electrophysiological study (EPS) and implantable loop recorder (ILR) were used only in patients with underlying structural heart disease or major unexplained syncope. We identified a cause of syncope in 66% of patients, including 27% vasovagal, 14% psychogenic, 6% arrhythmias, and 6% hypotension. Noninvasive testing identified 92% and invasive testing an additional 8% of the causes. HUTT yielded 38%, CSM 28%, HYV 49%, EPS 22%, and ILR 56% of diagnoses. On average, patients with arrhythmic causes were older, had a lower functional capacity, longer P-wave duration, and presented with fewer prodromes than patients with vasovagal or psychogenic syncope. CONCLUSIONS: A standardized stepwise evaluation emphasizing noninvasive tests yielded 2/3 of causes in patients referred to an ambulatory clinic for unexplained syncope. Neurally mediated and psychogenic mechanisms were behind >50% of episodes, while cardiac arrhythmias were uncommon. Sudden syncope, particularly in older patients with functional limitations or a prolonged P-wave, suggests an arrhythmic cause.

Physiotherapy practice in the private sector: organizational characteristics and models.

BACKGROUND: Even if a large proportion of physiotherapists work in the private sector worldwide, very little is known of the organizations within which they practice. Such knowledge is important to help understand contexts of practice and how they influence the quality of services and patient outcomes. The purpose of this study was to: 1) describe characteristics of organizations where physiotherapists practice in the private sector, and 2) explore the existence of a taxonomy of organizational models. METHODS: This was a cross-sectional quantitative survey of 236 randomly-selected physiotherapists. Participants completed a purpose-designed questionnaire online or by telephone, covering organizational vision, resources, structures and practices. Organizational characteristics were analyzed descriptively, while organizational models were identified by multiple correspondence analyses. RESULTS: Most organizations were for-profit (93.2%), located in urban areas (91.5%), and within buildings containing multiple businesses/organizations (76.7%). The majority included multiple providers (89.8%) from diverse professions, mainly physiotherapy assistants (68.7%), massage therapists (67.3%) and osteopaths (50.2%). Four organizational models were identified: 1) solo practice, 2) middle-scale multiprovider, 3) large-scale multiprovider and 4) mixed. CONCLUSIONS: The results of this study provide a detailed description of the organizations where physiotherapists practice, and highlight the importance of human resources in differentiating organizational models. Further research examining the influences of these organizational characteristics and models on outcomes such as physiotherapists' professional practices and patient outcomes are needed.

Pédiatrie [Pediatry].

During the previous year, several changes occurred in paediatric patient's management. The new PALS recommendations redefine the rhythm and the rate between cardiac massage and ventilation as well as the indications for defibrillation. The choice of the test for Helicobacter Pylori depends on the age of the patient and on the clinical situation. New anti-hypertensive drugs allow to limit the progression of chronic renal disease with hyper-tension and/or proteinuria. The choice between immunoglobulins, steroids, splenectomy and rituximab to treat chronic thrombocytopenic purpura treatment is a therapeutic challenge. Finally, a new approach is presented for diagnosis and treatment of iron overload in chronic hemoglobinopathies.

Successful Surgical Pulmonary Embolectomy for Massive Perinatal Embolism after Emergency Cesarean Section.

Pregnant women are exposed to an increased risk for developing pulmonary embolism (PE), a main cause for maternal mortality. Surgical pulmonary embolectomy is one important therapeutic and potential life-saving armamentarium, considering pregnancy as a relative contraindication for thrombolysis. We present a case of a 36-year-old woman with massive bilateral PE after emergent caesarean delivery, requiring reanimation by external heart massage. The onset of massive intrauterine bleeding contraindicated thrombolysis and emergency surgical pulmonary embolectomy, followed by a hysterectomy, were preformed successfully. Acute surgical pulmonary embolectomy may be an option in critically diseased high-risk patients, requiring a multiteam approach, and should be part of the therapeutic armamentarium of the attending cardiac surgeon.

Fisioterapia en la rehabilitación del usuario con síndrome doloroso regional complejo

Por sus múltiples causas y su sintomatología inespecífica, el síndrome doloroso regional complejo es una de las situaciones clínicas que mayor dificultad genera en el tratamiento fisioterapéutico. Este síndrome se define como una disfunción vasomotora, mediada por el sistema simpático en donde su manifestación primaria es un dolor que aumenta y permanece en el tiempo y que no tolera las diferentes modalidades y técnicas utilizadas por los Fisioterapeutas como herramientas de intervención. A través del tiempo el Fisioterapeuta ha tenido una acción relevante en el manejo del usuario con dolor, sin importar la causa o consecuencia del mismo. Por esta razón con esta revisión se quiere, integrar acciones terapéuticas como la carga de peso, la desensibilización y la relajación, que han dado excelentes resultados, a las prácticas tradicionales (medios físicos, ultrasonido, masaje sedativo y diferentes tipos de corrientes) aplicables a quienes padecen dolor secundario, traumático o visceral que compromete el sistema simpático en forma refleja.

Representaciones sociales de la medicina complementaria y alternativa (MCA) para el cáncer en estudiantes universitarios de carreras de ciencias de la salud

Se realizó un estudio cualitativo exploratorio con estudiantes de carreras de Ciencias de la Salud con el objetivo de comprender las representaciones sociales que tienen acerca de la Medicina Complementaria y Alternativa (MCA) para el cáncer. Se desarrollaron grupos focales y la información obtenida fue analizada a través del Análisis Temático e interpretada con base en la Teoría de las Representaciones Sociales. Se encontraron diversas representaciones sociales asociadas con la definición, los objetivos, los tratamientos, la eficacia, las fuentes de información y el origen de la MCA. En conclusión se evidenció una alta tendencia a la aceptación y a la manifestación de una actitud positiva, aunque ambivalente frente a la MCA, además de un desconocimiento por la diferenciación conceptual entre este tipo de Medicina y la Medicina Popular. La cultura y las creencias sociales predominan en las representaciones sociales que tienen los estudiantes de la MCA para el cáncer, pese a su formación académica.

The uses of Atuna racemosa Raf. (Chrysobalanaceae) in Samoa

An ethnobotanical study was made of the uses of Atuna racemosa subsp. racemosa (Chrysobalanaceae) in Samoa. The main use is of the cotyledons to extract an anti-inflammatory massage oil and a putty to caulk boats. Minor uses as a medicinal and of the wood are reported and a survey of herbarium material shows that the fruit of Atuna is widely used throughout the Pacific region.

Effects of Low-Level Laser Therapy (LLLT) in the Development of Exercise-Induced Skeletal Muscle Fatigue and Changes in Biochemical Markers Related to Postexercise Recovery

STUDY DESIGN: Randomized crossover double-blinded placebo-controlled trial. OBJECTIVE: To investigate if low-level laser therapy (LLLT) can affect biceps muscle performance, fatigue development, and biochemical markers of postexercise recovery. BACKGROUND: Cell and animal studies have suggested that LLLT can reduce oxidative stress and inflammatory responses in muscle tissue. But it remains uncertain whether these findings can translate into humans in sport and exercise situations. METHODS: Nine healthy male volleyball players participated in the study. They received either active LLLT (cluster probe with 5 laser diodes; A = 810 nm; 200 mW power output; 30 seconds of irradiation, applied in 2 locations over the biceps of the nondominant arm; 60 J of total energy) or placebo LLLT using an identical cluster probe. The intervention or placebo were applied 3 minutes before the performance of exercise. All subjects performed voluntary elbow flexion repetitions with a workload of 75% of their maximal voluntary contraction force until exhaustion. RESULTS: Active LLLT increased the number of repetitions by 14.5% (mean +/- SD, 39.6 +/- 4.3 versus 34.6 +/- 5.6; P = .037) and the elapsed time before exhaustion by 8.0% (P = .034), when compared to the placebo treatment. The biochemical markers also indicated that recovery may be positively affected by LLLT, as indicated by postexercise blood lactate levels (P<.01), creatine kinase activity (P = .017), and C-reactive protein levels (P = .047), showing a faster recovery with LLLT application prior to the exercise. CONCLUSION: We conclude that pre-exercise irradiation of the biceps with an LLLT dose of 6 J per application location, applied in 2 locations, increased endurance for repeated elbow flexion against resistance and decreased postexercise levels of blood lactate, creatine kinase, and C-reactive protein. LEVEL OF EVIDENCE: Performance enhancement, level 1b. J Orthop Sports Phys Ther 2010;40(8):524-532. doi:10.2519/jospt.2010.3294

SMÄRTA HOS BARN Sjuksköterskans omvårdnadsåtgårder och föräldrars delaktighet : - en systematisk litteraturstudie

Syftet med studien var att undersöka vilka omvårdnadsåtgärder en sjuksköterska kan utföra för att minska smärta, samt att undersöka vad föräldrarna kan bidra med för att underlätta smärtan hos sitt barn.Metoden som använts är en systematisk litteraturstudie, där 15 artiklar granskades. Det finns många olika omvårdnadsåtgärder för att lindra smärtan hos ett barn, detta kan göras med hjälp av avledning, förberedande information, sensorisk fokusering, kyla, visualisering, andningsteknik, avslappning och emotionellt stöd. Sjuksköterskan kan även hjälpa genom att stötta föräldrarna. Föräldrarna kan hjälpa sina barn genom emotionellt stöd, massage, avledning och lägesändringar. Enligt uppsatsförfattarna finns det enkla sätt för sjuksköterskan att underlätta barns smärta, som inte kräver barnspecialistutbildning från sjuksköterskan. Sjuksköterskan kan t.ex. tala med barnet om något positivt i barnets liv och genom detta avleda barnet från smärtan. Uppsatsförfattarna tror att genom att stödja föräldrarna ges de modet att utföra åtgärder som kan lindra smärtan hos barnen.

TrycksårspreventionEvidensbaserade omvårdnadsåtgärder samtsjuksköterskans tillämpning av dessa

Syftet med studien var att undersöka vilka evidensbaserade omvårdnadsåtgärder det finns för att förebygga trycksår. Vidare var syftet att undersöka vilka preventiva åtgärder som sjuksköterskan tillämpar samt i vilken utsträckning detta sker. Studien utfördes som en systematisk litteraturstudie. Litteratur söktes i databaserna Cinahl och Medline samt via sökmotorn Elin@Dalarna. Artiklarna skulle vara publicerade år 2003 eller senare, skrivna på svenska eller engelska samt tillgängliga i fulltext. En sammanfattning av huvudresultatet visar att de omvårdnadsåtgärder, vilka signifikant reducerade incidensen av trycksår var: riskbedömning med hjälp av validerat instrument, planerad lägesändring samt tryckavlastande hjälpmedel. Det framkom att de preventiva omvårdnadsåtgärder sjuksköterskan tillämpade för att förebygga tryckskada var användning av riskbedömningsinstrument, hudinspektion, planerad lägesändring, tryckavlastande hjälpmedel, massage och smörjning med fuktkräm på utsatta hudområden samt nutritionsbedömning. Det visade sig emellertid att patienter med risk för att utveckla trycksår inte erhöll prevention enligt respektive lands riktlinjer, dessutom visade det sig att det förekom att patienter med risk för tryckskada inte erhöll någon prevention alls.

Berörd av beröring : Effekter och användning av beröring på demenssjuka personer- En litteraturstudie

Syftet med denna litteraturstudie var att beskriva olika former av beröring samt dess effekt för personer med sjukdomen demens. Sökningarna har gjorts i databaserna Pubmed, Cinahl och sökmotorn ELIN@du.se med sökorden: massage, dementia, nursing, home, touch, older, patients, therapeutic touch, care och therapy. Artiklarna var utförda mellan år 2000 till 2009 och var kvalitativa och kvantitativa och utgjorde urvalet. För att värdera de utvalda artiklarna användes granskningsmallar. Resultat visade att beröring gav positiva effekter på stress och agiterat beteende såsom skrikbeteende och fysiskt upprört beteende. Beröringen bidrog till att patienterna slappnade av fick lättare att somna. Beröringen minskade oro, depression och nedstämdhet och bidrog till en högre grad av välmående. Beröringen gav däremot ingen effekt på fysiskt aggressivt beteende. Användning av beröring förstärkte relationen mellan vårdare och patient. Beröringen ska ges med full uppmärksamhet till patienten. Patienten ska kunna avbryta beröringen om den upplevs som obehaglig. Slutsatsen som uppsatsförfattarna drog var att beröring gav positiva effekter, oberoende var på kroppen beröringen gavs samt vilken sorts beröring som gavs. Beröringen ska även ske tillsammans med en god kommunikation med den dementa personen för att uppnå bäst resultat.

Icke-farmakologiska omvårdnadsåtgärder som kan öka välbefinnandet hos personer med demens

Syftet med denna studie var att undersöka vilka icke-farmakologiska omvårdnadsåtgärder som bidrar till reducerad förekomst av beteendestörningar och ökar välbefinnandet hos personer med demens. Studien utfördes som en systematisk litteraturstudie där 15 artiklar inkluderades. Icke-farmakologiska omvårdnadsåtgärder som inkluderades i den här studien var musik, aktivitet och träning och massage och beröring. Beteendestörningar framför allt agitation kan lindras med hjälp av massage och beröring, aktivitet samt musikterapi i olika former. Det är viktigt att utforma alla dessa omvårdnadsåtgärder utifrån individen för att erhålla ett gott resultat. Även välbefinnandet påverkas positivt av dessa icke-farmakologiska omvårdnadsåtgärder. Fördelarna med dessa omvårdnadsåtgärder är att de är enkla att utföra och lära ut, kostnadseffektiva och har få biverkningar. I denna litteraturstudie framgår även att det sociala samspelat har en viktig roll för att personer med demens upplever välbefinnande. Slutsatsen är att det borde vara enkelt att använda sig av dessa effektiva metoder i både demensvård och annan vård.