scholarly journals Cerebrovascular response to the cold pressor test - the critical role of carbon dioxide

2017 ◽  
Vol 102 (12) ◽  
pp. 1647-1660 ◽  
Author(s):  
Michael M. Tymko ◽  
Thijs P. Kerstens ◽  
Kevin W. Wildfong ◽  
Philip N. Ainslie
Keyword(s):  
Carbon Dioxide ◽  
Critical Role ◽  
Cold Pressor Test ◽  
Cold Pressor ◽  
Pressor Test

scholarly journals The expanding role of the cold pressor test: a brief history

2021 ◽  
Author(s):  
Guillaume Lamotte ◽  
Christopher J. Boes ◽  
Phillip A. Low ◽  
Elizabeth A. Coon
Keyword(s):  
Cold Pressor Test ◽  
Cold Pressor ◽  
Pressor Test

The role of adrenal medullary catecholamine release in the response to a cold pressor test

1983 ◽  
Vol 17 (4) ◽  
pp. 189-191 ◽  
Author(s):  
M. F CUMMINGS ◽  
P. M STEELE ◽  
L. J M MAHAR ◽  
D. B FREWIN ◽  
W J. RUSSELL
Keyword(s):  
Cold Pressor Test ◽  
Cold Pressor ◽  
Catecholamine Release ◽  
Pressor Test

scholarly journals Influence of Cognitive Orientation and Attentional Focus on Pain Perception

2021 ◽  
Vol 18 (13) ◽  
pp. 7176
Author(s):  
Pierluigi Diotaiuti ◽  
Stefano Corrado ◽  
Stefania Mancone ◽  
Lavinia Falese ◽  
Angelo Rodio ◽  
...  
Keyword(s):  
Learned Helplessness ◽  
Self Efficacy ◽  
Pain Perception ◽  
Cold Pressor Test ◽  
Cold Pressor ◽  
Attentional Focus ◽  
Pressor Test ◽  
Perceived Pain ◽  
Positive Effect

Background. Recently, a growing interest has emerged in the role of attention and hypervigilance in the experience of pain. Shifting attention away from pain seems likely to reduce the perception of pain itself. Objectives. The present study has been designed to test the following overall hypotheses: (1) disposition to catastrophize, self-efficacy perceived in pain resistance (task self-efficacy), previous experiences concerning the tolerance of physical pain, and degree of impulsiveness are significant predictors of the decision to abandon a painful test such as the cold pressor test (CPT); (2) the manipulation of the attentive focus (internal or external) can influence the level of perceived pain. Methods. Effects of the manipulation of attentional focus (internal and external) on pain perception and response of trial abandonment were evaluated in a sample of university students (n = 246) subjected to the cold pressor test. Results. A significant effect (p < 0.05) was found through a test–retest comparison on the final level of perceived pain among subjects who had received instruction to externalize the focus of their attention (mixed factorial analysis of variance), but no significance was observed with respect to the decision to abandon the experiment. A general explanatory model of the abandonment behavior demonstrating overall good fit measurements was tested too. Conclusion. The abandonment of tests has been shown to be predicted mainly by catastrophic attitude. Attentive impulsiveness showed a further positive effect on catastrophic attitude. Perceived self-efficacy in the tolerance of pain limited learned helplessness, which in turn positively influenced catastrophizing.

Repercussões pressóricas do frio local: a crioterapia deve ser administrada com precaução em pacientes hipertensos?

2016 ◽  
Vol 14 (4) ◽  
Author(s):  
Marcelo Coertjens
Keyword(s):  
Cold Pressor Test ◽  
Cold Pressor ◽  
Pressor Test

Introdução: A crioterapia é um recurso que diminui a temperatura corporal local com finalidades terapêuticas. Uma importante repercussão é a vasoconstrição local, que seria o desencadeador de um possível aumento na pressão arterial (PA). Entretanto, não existem trabalhos que comprovem essa suposição. Nossa hipótese é que os resultados das pesquisas de Cold Pressor Test (CPT) avaliando PA acabaram historicamente fundamentando as precauções da crioterapia em relação a pacientes hipertensos. Objetivo: Realizar uma revisão de literatura a respeito das pesquisas que sustentam a precaução da crioterapia em indivíduos hipertensos e verificar sua relação com estudos que utilizaram o CPT. Material e métodos: Trata-se de uma revisão de literatura que utilizou as bases de dados online Medline, Scielo, Lilacs e Google Acadêmico para a realização da pesquisa. Resultado: Apesar de não serem unânimes, diversas pesquisas que utilizaram o CPT encontraram significativos aumentos da atividade nervosa simpática muscular e da PA em normotensos e hipertensos, entretanto não encontramos estudos que tenham comprovado respostas significativas de PA com o uso da crioterapia, principalmente, em hipertensos. Conclusão: Não existem evidências científicas que comprovem a precaução da crioterapia em indivíduos hipertensos. Além disso, os estudos com CPT não são unânimes em relação aos aumentos pressóricos em indivíduos normotensos e hipertensos.Palavras-chave: crioterapia, hemodinâmica, hipertensão, pressão arterial. 

The tolerance to stretch is linked with endogenous modulation of pain

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Morten Pallisgaard Støve ◽  
Rogerio Pessoto Hirata ◽  
Thorvaldur Skuli Palsson
Keyword(s):  
Range Of Motion ◽  
Pain Sensitivity ◽  
Cold Pressor Test ◽  
Cold Pressor ◽  
Static Stretch ◽  
Pain Thresholds ◽  
Pressure Pain ◽  
Pressor Test ◽  
Pressure Pain Thresholds ◽  
Exercise Induced

Abstract Objectives The effect of stretching on joint range of motion is well documented, and although sensory perception has significance for changes in the tolerance to stretch following stretching the underlining mechanisms responsible for these changes is insufficiently understood. The aim of this study was to examine the influence of endogenous pain inhibitory mechanisms on stretch tolerance and to investigate the relationship between range of motion and changes in pain sensitivity. Methods Nineteen healthy males participated in this randomized, repeated-measures crossover study, conducted on 2 separate days. Knee extension range of motion, passive resistive torque, and pressure pain thresholds were recorded before, after, and 10 min after each of four experimental conditions; (i) Exercise-induced hypoalgesia, (ii) two bouts of static stretching, (iii) resting, and (iv) a remote, painful stimulus induced by the cold pressor test. Results Exercise-induced hypoalgesia and cold pressor test caused an increase in range of motion (p<0.034) and pressure pain thresholds (p<0.027). Moderate correlations in pressure pain thresholds were found between exercise-induced hypoalgesia and static stretch (Rho>0.507, p=0.01) and exercise-induced hypoalgesia and the cold pressor test (Rho=0.562, p=0.01). A weak correlation in pressure pain thresholds and changes in range of motion were found following the cold pressor test (Rho=0.460, p=0.047). However, a potential carryover hypoalgesic effect may have affected the results of the static stretch. Conclusions These results suggest that stretch tolerance may be linked with endogenous modulation of pain. Present results suggest, that stretch tolerance may merely be a marker for pain sensitivity which may have clinical significance given that stretching is often prescribed in the rehabilitation of different musculoskeletal pain conditions where reduced endogenous pain inhibition is frequently seen.

scholarly journals Contactless analysis of heart rate variability during cold pressor test using radar interferometry and bidirectional LSTM networks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kilin Shi ◽  
Tobias Steigleder ◽  
Sven Schellenberger ◽  
Fabian Michler ◽  
Anke Malessa ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Dynamic Change ◽  
Cold Pressor Test ◽  
Cold Pressor ◽  
Contactless Measurement ◽  
Pressor Test ◽  
Skin Contact ◽  
Bidirectional Lstm ◽  
Lstm Network

AbstractContactless measurement of heart rate variability (HRV), which reflects changes of the autonomic nervous system (ANS) and provides crucial information on the health status of a person, would provide great benefits for both patients and doctors during prevention and aftercare. However, gold standard devices to record the HRV, such as the electrocardiograph, have the common disadvantage that they need permanent skin contact with the patient. Being connected to a monitoring device by cable reduces the mobility, comfort, and compliance by patients. Here, we present a contactless approach using a 24 GHz Six-Port-based radar system and an LSTM network for radar heart sound segmentation. The best scores are obtained using a two-layer bidirectional LSTM architecture. To verify the performance of the proposed system not only in a static measurement scenario but also during a dynamic change of HRV parameters, a stimulation of the ANS through a cold pressor test is integrated in the study design. A total of 638 minutes of data is gathered from 25 test subjects and is analysed extensively. High F-scores of over 95% are achieved for heartbeat detection. HRV indices such as HF norm are extracted with relative errors around 5%. Our proposed approach is capable to perform contactless and convenient HRV monitoring and is therefore suitable for long-term recordings in clinical environments and home-care scenarios.

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