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  • Caroline Rickards
2019

Hemorrhage simulated by lower body negative pressure provokes an oxidative stress response in healthy young adults

Park, F. S., Kay, V. L., Sprick, J. D., Rosenberg, A. J., Anderson, G. K., Mallet, R. T. & Rickards, C. A., 1 Mar 2019, In : Experimental Biology and Medicine. 244, 3, p. 272-278 7 p.

Research output: Contribution to journalArticle

Impact of environmental stressors on tolerance to hemorrhage in humans

Crandall, C. G., Rickards, C. A. & Johnson, B. D., Feb 2019, In : American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 316, 2, p. R88-R100

Research output: Contribution to journalReview article

2 Scopus citations

Ischaemic and hypoxic conditioning: potential for protection of vital organs

Sprick, J. D., Mallet, R. T., Przyklenk, K. & Rickards, C. A., 1 Mar 2019, In : Experimental physiology. 104, 3, p. 278-294 17 p.

Research output: Contribution to journalArticle

8 Scopus citations

Responses of cerebral blood velocity and tissue oxygenation to low-frequency oscillations during simulated haemorrhagic stress in humans

Anderson, G. K., Sprick, J. D., Park, F. S., Rosenberg, A. J. & Rickards, C. A., 1 Aug 2019, In : Experimental physiology. 104, 8, p. 1190-1201 12 p.

Research output: Contribution to journalArticle

Vive la résistance! The role of inspiratory resistance breathing on cerebral blood flow

Rickards, C. A., 1 Jul 2019, In : Respiratory Physiology and Neurobiology. 265, p. 76-82 7 p.

Research output: Contribution to journalReview article

2 Scopus citations
2018

Time course of compensatory physiological responses to central hypovolemia in high-and low-tolerant human subjects

Xiang, L., Hinojosa-Laborde, C., Ryan, K. L., Rickards, C. A. & Convertino, V. A., 20 Aug 2018, In : American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 315, 2, p. R408-R416

Research output: Contribution to journalArticle

1 Scopus citations
2017
4 Scopus citations
5 Scopus citations
6 Scopus citations
2015

Acute inhalation of vaporized nicotine increases arterial pressure in young non-smokers: a pilot study

Cooke, W. H., Pokhrel, A., Dowling, C., Fogt, D. L. & Rickards, C. A., 22 Aug 2015, In : Clinical Autonomic Research. 25, 4, p. 267-270 4 p.

Research output: Contribution to journalArticle

11 Scopus citations

Cerebral blood-flow regulation during hemorrhage

Rickards, C. A., 1 Oct 2015, In : Comprehensive Physiology. 5, 4, p. 1585-1621 37 p.

Research output: Contribution to journalArticle

18 Scopus citations

Cerebral blood velocity regulation during progressive blood loss compared with lower body negative pressure in humans

Rickards, C. A., Johnson, B. D., Harvey, R. E., Convertino, V. A., Joyner, M. J. & Barnes, J. N., 15 Sep 2015, In : Journal of Applied Physiology. 119, 6, p. 677-685 9 p.

Research output: Contribution to journalArticle

16 Scopus citations

Coupling between arterial pressure, cerebral blood velocity, and cerebral tissue oxygenation with spontaneous and forced oscillations

Rickards, C. A., Sprick, J. D., Colby, H. B., Kay, V. L. & Tzeng, Y. C., 1 Apr 2015, In : Physiological Measurement. 36, 4, p. 785-801 17 p.

Research output: Contribution to journalArticle

8 Scopus citations

Graduate students and postdoctoral fellows receive Tum Suden/Hellebrandt professional opportunity awards

Rickards, C. A., 1 Jan 2015, In : Physiologist. 58, 5, p. 250-251 2 p.

Research output: Contribution to journalComment/debate

Reproducibility of a continuous ramp lower body negative pressure protocol for simulating hemorrhage

Kay, V. L. & Rickards, C. A., 1 Nov 2015, In : Physiological Reports. 3, 11, e12640.

Research output: Contribution to journalArticle

7 Scopus citations

Transfer function analysis of dynamic cerebral autoregulation: A white paper from the International Cerebral Autoregulation Research Network

international Cerebral Autoregulation Research Network (CARNet), 1 Jan 2015, In : Journal of Cerebral Blood Flow and Metabolism. 36, 4, p. 665-680 16 p.

Research output: Contribution to journalReview article

132 Scopus citations
2014

Are you bleeding? Validation of a machine-learning algorithm for determination of blood volume status: Application to remote triage

Rickards, C. A., Vyas, N., Ryan, K. L., Ward, K. R., Andre, D., Hurst, G. M., Barrera, C. R. & Convertino, V. A., 1 Mar 2014, In : Journal of Applied Physiology. 116, 5, p. 486-494 9 p.

Research output: Contribution to journalArticle

9 Scopus citations

Arterial pressure and cerebral blood flow variability: Friend or foe? A review

Rickards, C. A. & Tzeng, Y. C., 1 Jan 2014, In : Frontiers in Physiology. 5 APR, Article 120.

Research output: Contribution to journalReview article

33 Scopus citations

Between-centre variability in transfer function analysis, a widely used method for linear quantification of the dynamic pressure-flow relation: The CARNet study

Meel-van den Abeelen, A. S. S., Simpson, D. M., Wang, L. J. Y., Slump, C. H., Zhang, R., Tarumi, T., Rickards, C. A., Payne, S., Mitsis, G. D., Kostoglou, K., Marmarelis, V., Shin, D., Tzeng, Y. C., Ainslie, P. N., Gommer, E., Müller, M., Dorado, A. C., Smielewski, P., Yelicich, B., Puppo, C. & 6 others, Liu, X., Czosnyka, M., Wang, C. Y., Novak, V., Panerai, R. B. & Claassen, J. A. H. R., 1 Jan 2014, In : Medical Engineering and Physics. 36, 5, p. 620-627 8 p.

Research output: Contribution to journalArticle

30 Scopus citations

Blood pressure and cerebral blood flow oscillations: Friend or foe?

Rickards, C. A. & Tzeng, Y. C., 1 Jan 2014, 2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014. IEEE Computer Society, p. 179-180 2 p. 6847578. (2014 8th Conference of the European Study Group on Cardiovascular Oscillations, ESGCO 2014).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Platelet activation after presyncope by lower body negative pressure in humans

Zaar, M., Fedyk, C. G., Pidcoke, H. F., Scherer, M. R., Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Convertino, V. A. & Cap, A. P., 29 Dec 2014, In : PLoS ONE. 9, 12, e116174.

Research output: Contribution to journalArticle

6 Scopus citations
2013

Far from home challenges facing international graduate students, postdocs, & professionals living and working in the US

Rickards, C. A., 1 Mar 2013, In : Physiologist. 56, 2, p. 50-52 3 p.

Research output: Contribution to journalComment/debate

Heart rate variability analysis during central hypovolemia using wavelet transformation

Ji, S. Y., Belle, A., Ward, K. R., Ryan, K. L., Rickards, C. A., Convertino, V. A. & Najarian, K., 1 Jun 2013, In : Journal of Clinical Monitoring and Computing. 27, 3, p. 289-302 14 p.

Research output: Contribution to journalArticle

13 Scopus citations
2012

A recipe for reducing blood pressure variability: Adding blood flow to the mix

Tzeng, Y. C., MacRae, B. & Rickards, C., 1 Aug 2012, In : Hypertension. 60, 2, p. e12

Research output: Contribution to journalLetter

4 Scopus citations

Assessment of cerebral autoregulation: The quandary of quantification

Tzeng, Y. C., Ainslie, P. N., Cooke, W. H., Peebles, K. C., Willie, C. K., MacRae, B. A., Smirl, J. D., Horsman, H. M. & Rickards, C. A., 15 Sep 2012, In : American Journal of Physiology - Heart and Circulatory Physiology. 303, 6, p. H658-H671

Research output: Contribution to journalArticle

87 Scopus citations

Autonomic mechanisms associated with heart rate and vasoconstrictor reserves

Convertino, V. A., Rickards, C. A. & Ryan, K. L., 1 Jun 2012, In : Clinical Autonomic Research. 22, 3, p. 123-130 8 p.

Research output: Contribution to journalArticle

47 Scopus citations

Early detection of hemorrhage via central pulse pressure derived from a non-invasive peripheral arterial blood pressure waveform

Zhang, G., Ryan, K. L., Rickards, C. A., Convertino, V. A. & Mukkamala, R., 14 Dec 2012, 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012. p. 3116-3119 4 p. 6346624. (Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Effects of dehydration on cerebrovascular control during standing after heavy resistance exercise

Moralez, G., Romero, S. A., Rickards, C. A., Ryan, K. L., Convertino, V. A. & Cooke, W. H., 1 Jun 2012, In : Journal of Applied Physiology. 112, 11, p. 1875-1883 9 p.

Research output: Contribution to journalArticle

12 Scopus citations

Lightweight noninvasive trauma monitor for early indication of central hypovolemia and tissue acidosis: A review

Soller, B. R., Zou, F., Ryan, K. L., Rickards, C. A., Ward, K. & Convertino, V. A., 1 Aug 2012, In : Journal of Trauma and Acute Care Surgery. 73, 2 SUPPL. 1, p. S106-S111

Research output: Contribution to journalArticle

17 Scopus citations

Progressive reduction in central blood volume is not detected by sublingual capnography

Chung, K. K., Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Pamplin, J. C., Patel, S. S., Herold, T. S. & Convertino, V. A., 1 Jun 2012, In : Shock. 37, 6, p. 586-591 6 p.

Research output: Contribution to journalArticle

4 Scopus citations

Reply from K. L. Ryan, C. A. Rickards, C. Hinojosa-Laborde, W. H. Cooke and V. A. Convertino

Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Cooke, W. H. & Convertino, V. A., 1 Feb 2012, In : Journal of Physiology. 590, 3, p. 649 1 p.

Research output: Contribution to journalLetter

Simultaneous spectroscopic determination of forearm muscle pH and oxygen saturation during simulated haemorrhage

Soller, B. R., Sliwa, J., Yang, Y., Zou, F., Ryan, K. L., Rickards, C. A. & Convertino, V. A., 2 Apr 2012, In : Journal of Near Infrared Spectroscopy. 20, 1, p. 141-150 10 p.

Research output: Contribution to journalArticle

5 Scopus citations

Sympathetic responses to central hypovolemia: New insights from microneurographic recordings

Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Cooke, W. H. & Convertino, V. A., 20 Sep 2012, In : Frontiers in Physiology. 3 APR, Article 110.

Research output: Contribution to journalArticle

24 Scopus citations
2011

Advanced technology development for remote triage applications in bleeding combat casualties.

Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Gerhardt, R. T., Cain, J. & Convertino, V. A., 1 Jan 2011, In : U.S. Army Medical Department journal. p. 61-72 12 p.

Research output: Contribution to journalReview article

5 Scopus citations

Arterial pressure oscillations are not associated with muscle sympathetic nerve activity in individuals exposed to central hypovolaemia

Ryan, K. L., Rickards, C. A., Hinojosa-Laborde, C., Cooke, W. H. & Convertino, V. A., 1 Nov 2011, In : Journal of Physiology. 589, 21, p. 5311-5322 12 p.

Research output: Contribution to journalArticle

21 Scopus citations

Control of cerebral blood velocity with furosemide-induced hypovolemia and upright tilt

Romero, S. A., Moralez, G., Rickards, C. A., Ryan, K. L., Convertino, V. A., Fogt, D. L. & Cooke, W. H., 1 Feb 2011, In : Journal of Applied Physiology. 110, 2, p. 492-498 7 p.

Research output: Contribution to journalArticle

18 Scopus citations

Heart rate variability during simulated hemorrhage with lower body negative pressure in high and low tolerant subjects

Hinojosa-Laborde, C., Rickards, C. A., Ryan, K. L. & Convertino, V. A., 1 Dec 2011, In : Frontiers in Physiology. 2 NOV, Article 85.

Research output: Contribution to journalArticle

21 Scopus citations

Improved pulse transit time estimation by system identification analysis of proximal and distal arterial waveforms

Xu, D., Ryan, K. L., Rickards, C. A., Zhang, G., Convertino, V. A. & Mukkamala, R., 1 Oct 2011, In : American Journal of Physiology - Heart and Circulatory Physiology. 301, 4, p. H1389-H1395

Research output: Contribution to journalArticle

22 Scopus citations

Monitoring non-invasive cardiac output and stroke volume during experimental human hypovolaemia and resuscitation.

Reisner, A. T., Xu, D., Ryan, K. L., Convertino, V. A., Rickards, C. A. & Mukkamala, R., Jan 2011, In : British journal of anaesthesia. 106, 1, p. 23-30 8 p.

Research output: Contribution to journalArticle

41 Scopus citations

Optimizing the respiratory pump: Harnessing inspiratory resistance to treat systemic hypotension

Convertino, V. A., Ryan, K. L., Rickards, C. A., Glorsky, S. L., Idris, A. H., Yannopoulos, D., Metzger, A. & Lurie, K. G., 1 Jun 2011, In : Respiratory Care. 56, 6, p. 846-857 12 p.

Research output: Contribution to journalReview article

35 Scopus citations

Pulse oximeter plethysmographic waveform changes in awake, spontaneously breathing, hypovolemic volunteers

McGrath, S. P., Ryan, K. L., Wendelken, S. M., Rickards, C. A. & Convertino, V. A., 1 Feb 2011, In : Anesthesia and analgesia. 112, 2, p. 368-374 7 p.

Research output: Contribution to journalArticle

48 Scopus citations

Tolerance to central hypovolemia: the influence of oscillations in arterial pressure and cerebral blood velocity

Rickards, C. A., Ryan, K. L., Cooke, W. H. & Convertino, V. A., 1 Oct 2011, In : Journal of Applied Physiology. 111, 4, p. 1048-1058 11 p.

Research output: Contribution to journalArticle

57 Scopus citations

Use of advanced machine-learning techniques for noninvasive monitoring of hemorrhage

Convertino, V. A., Moulton, S. L., Grudic, G. Z., Rickards, C. A., Hinojosa-Laborde, C., Gerhardt, R. T., Blackbourne, L. H. & Ryan, K. L., 1 Jul 2011, In : Journal of Trauma - Injury, Infection and Critical Care. 71, SUPPL. 1, p. S25-S32

Research output: Contribution to journalReview article

63 Scopus citations
2010

Characterization of common measures of heart period variability in healthy human subjects: Implications for patient monitoring

Rickards, C. A., Ryan, K. L. & Convertino, V. A., 1 Feb 2010, In : Journal of Clinical Monitoring and Computing. 24, 1, p. 61-70 10 p.

Research output: Contribution to journalArticle

21 Scopus citations

Ectopy in trauma patients: Cautions for use of heart period variability in medical monitoring

Sethuraman, G., Ryan, K. L., Rickards, C. A. & Convertino, V. A., 1 Feb 2010, In : Aviation Space and Environmental Medicine. 81, 2, p. 125-129 5 p.

Research output: Contribution to journalArticle

12 Scopus citations

Is heart period variability associated with the administration of lifesaving interventions in individual prehospital trauma patients with normal standard vital signs?

Rickards, C. A., Ryan, K. L., Ludwig, D. A. & Convertino, V. A., Aug 2010, In : Critical Care Medicine. 38, 8, p. 1666-1673 8 p.

Research output: Contribution to journalArticle

23 Scopus citations

Oxygen transport characterization of a human model of progressive hemorrhage

Ward, K. R., Tiba, M. H., Ryan, K. L., Torres Filho, I. P., Rickards, C. A., Witten, T., Soller, B. R., Ludwig, D. A. & Convertino, V. A., 1 Aug 2010, In : Resuscitation. 81, 8, p. 987-993 7 p.

Research output: Contribution to journalArticle

50 Scopus citations

Re: Heart period variability monitoring in trauma and hemorrhage

Rickards, C. A., 1 Aug 2010, In : Journal of Trauma - Injury, Infection and Critical Care. 69, 2, p. 479-480 2 p.

Research output: Contribution to journalLetter

Robust pulse wave velocity estimation by application of system identification to proximal and distal arterial waveforms

Xu, D., Ryan, K. L., Rickards, C. A., Zhang, G., Convertino, V. A. & Mukkamala, R., 1 Dec 2010, 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10. p. 3559-3562 4 p. 5627718. (2010 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC'10).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

The authors reply

Rickards, C. A., Ryan, K. L., Ludwig, D. A. & Convertino, V. A., 1 Nov 2010, In : Critical Care Medicine. 38, 11, p. 2269-2270 2 p.

Research output: Contribution to journalLetter