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Items: 1 to 50 of 335

1.

NavWell: A simplified virtual-reality platform for spatial navigation and memory experiments.

Commins S, Duffin J, Chaves K, Leahy D, Corcoran K, Caffrey M, Keenan L, Finan D, Thornberry C.

Behav Res Methods. 2019 Oct 21. doi: 10.3758/s13428-019-01310-5. [Epub ahead of print]

PMID:
31637666
2.

Impact of Graded Passive Cycling on Hemodynamics, Brain, and Heart Perfusion in Healthy Adults.

Chen J, Martin C, McIntyre CW, Ball IM, Duffin J, Slessarev M.

Front Med (Lausanne). 2019 Aug 20;6:186. doi: 10.3389/fmed.2019.00186. eCollection 2019.

3.

Do practice guidelines cause drug shortages? The historical example of β-blockers.

Duffin J.

CMAJ. 2019 Sep 16;191(37):E1029-E1031. doi: 10.1503/cmaj.190289. No abstract available.

PMID:
31527190
4.

A feasibility randomised controlled trial to evaluate the role of computed tomography in adults with atypical right iliac fossa pain.

Jones R, Olatunbode D, Dean J, Hall B, Harji D, Davis P, Ahmed I, Ansari R, Bookless L, Chidumije N, Duffin J, Edwards N, Firescu M, Grainge S, Harbit A, Hollingsworth A, Imam Z, Keast L, Li M, Mbarushimana S, McElnay P, Mellen J, Miller D, Munipalle C, Musbahi A, Norton D, Omar K, Smith B, Teo A, Yuan J.

Ann R Coll Surg Engl. 2019 Nov;101(8):546-551. doi: 10.1308/rcsann.2019.0077. Epub 2019 Jun 20.

PMID:
31219315
5.

Simultaneous assessment of central and peripheral chemoreflex regulation of muscle sympathetic nerve activity and ventilation in healthy young men.

Keir DA, Duffin J, Millar PJ, Floras JS.

J Physiol. 2019 Jul;597(13):3281-3296. doi: 10.1113/JP277691. Epub 2019 May 28.

PMID:
31087324
6.

Cerebrovascular Resistance in Healthy Aging and Mild Cognitive Impairment.

McKetton L, Cohn M, Tang-Wai DF, Sobczyk O, Duffin J, Holmes KR, Poublanc J, Sam K, Crawley AP, Venkatraghavan L, Fisher JA, Mikulis DJ.

Front Aging Neurosci. 2019 Apr 12;11:79. doi: 10.3389/fnagi.2019.00079. eCollection 2019.

7.

Improved White Matter Cerebrovascular Reactivity after Revascularization in Patients with Steno-Occlusive Disease.

McKetton L, Venkatraghavan L, Rosen C, Mandell DM, Sam K, Sobczyk O, Poublanc J, Gray E, Crawley A, Duffin J, Fisher JA, Mikulis DJ.

AJNR Am J Neuroradiol. 2019 Jan;40(1):45-50. doi: 10.3174/ajnr.A5912. Epub 2018 Dec 20.

PMID:
30573457
8.

Mrs. Robinson's Revenge: Pete Seeger, Earl Robinson, and the Medicare Protest Song.

Duffin J, Pater JL.

Can Bull Med Hist. 2018 Fall;35(2):413-436. doi: 10.3138/cbmh.243-122017.

PMID:
30365373
9.

Mrs. Robinson's Revenge: Pete Seeger, Earl Robinson, and the Medicare Protest Song.

Duffin J, Pater JL.

Can Bull Med Hist. 2018 Oct 1:1-24. doi: 10.3138/cbmh.243-012018. [Epub ahead of print]

PMID:
30274527
10.

The effect of acute morphine on obstructive sleep apnoea: a randomised double-blind placebo-controlled crossover trial.

Rowsell L, Wong KKH, Yee BJ, Eckert DJ, Somogyi AA, Duffin J, Grunstein RR, Wang D.

Thorax. 2019 Feb;74(2):177-184. doi: 10.1136/thoraxjnl-2018-211675. Epub 2018 Aug 30.

PMID:
30166422
11.

The aging brain and cerebrovascular reactivity.

McKetton L, Sobczyk O, Duffin J, Poublanc J, Sam K, Crawley AP, Venkatraghavan L, Fisher JA, Mikulis DJ.

Neuroimage. 2018 Nov 1;181:132-141. doi: 10.1016/j.neuroimage.2018.07.007. Epub 2018 Jul 5.

PMID:
29981482
12.

Cerebrovascular Resistance: The Basis of Cerebrovascular Reactivity.

Duffin J, Sobczyk O, McKetton L, Crawley A, Poublanc J, Venkatraghavan L, Sam K, Mutch WA, Mikulis D, Fisher JA.

Front Neurosci. 2018 Jun 19;12:409. doi: 10.3389/fnins.2018.00409. eCollection 2018.

13.

Long-term changes in cerebrovascular reactivity following EC-IC bypass for intracranial steno-occlusive disease.

Rosen C, McKetton L, Russell J, Sam K, Poublanc J, Crawley A, Han JS, Sobczyk O, Duffin J, Mandell DM, Tymianski M, Fisher JA, Mikulis DJ, Venkatraghavan L.

J Clin Neurosci. 2018 Aug;54:77-82. doi: 10.1016/j.jocn.2018.06.009. Epub 2018 Jun 12.

PMID:
29907385
14.

Importance of Collateralization in Patients With Large Artery Intracranial Occlusive Disease: Long-Term Longitudinal Assessment of Cerebral Hemodynamic Function.

McKetton L, Venkatraghavan L, Poublanc J, Sobczyk O, Crawley AP, Rosen C, Silver FL, Duffin J, Fisher JA, Mikulis DJ.

Front Neurol. 2018 Apr 6;9:226. doi: 10.3389/fneur.2018.00226. eCollection 2018.

15.

Paediatric obstructive sleep apnoea: is our operative management evidence-based?

Pabla L, Duffin J, Flood L, Blackmore K.

J Laryngol Otol. 2018 Apr;132(4):293-298. doi: 10.1017/S002221511800021X. Epub 2018 Feb 21. Review.

PMID:
29463325
16.

Doctors as Stewards of medicare, or not: CAMSI, MRG, CDM, DRHC and the thin alphabet soup of physician support.

Duffin J.

Health Econ Policy Law. 2018 Jul;13(3-4):450-474. doi: 10.1017/S1744133117000470. Epub 2018 Feb 20.

PMID:
29460710
17.

Educating Future Physicians for Ontario and the physicians' strike of 1986: the roots of Canadian competency-based medical education.

Butt H, Duffin J.

CMAJ. 2018 Feb 20;190(7):E196-E198. doi: 10.1503/cmaj.171043. No abstract available.

18.

Paediatric obstructive sleep apnoea: can our identification of surgical candidates be evidence-based?

Pabla L, Duffin J, Flood L, Blackmore K.

J Laryngol Otol. 2018 Apr;132(4):284-292. doi: 10.1017/S0022215118000208. Epub 2018 Feb 14. Review.

PMID:
29439747
19.

Patient-Specific Alterations in CO2 Cerebrovascular Responsiveness in Acute and Sub-Acute Sports-Related Concussion.

Mutch WAC, Ellis MJ, Ryner LN, McDonald PJ, Morissette MP, Pries P, Essig M, Mikulis DJ, Duffin J, Fisher JA.

Front Neurol. 2018 Jan 24;9:23. doi: 10.3389/fneur.2018.00023. eCollection 2018.

20.

Sweating blood: history and review.

Duffin J.

CMAJ. 2017 Oct 23;189(42):E1315-E1317. doi: 10.1503/cmaj.170756. Epub 2017 Oct 22. No abstract available.

21.

Measurement of Cerebrovascular Reactivity as Blood Oxygen Level-Dependent Magnetic Resonance Imaging Signal Response to a Hypercapnic Stimulus in Mechanically Ventilated Patients.

Venkatraghavan L, Poublanc J, Han JS, Sobczyk O, Rozen C, Sam K, Duffin J, Mikulis DJ, Fisher JA.

J Stroke Cerebrovasc Dis. 2018 Feb;27(2):301-308. doi: 10.1016/j.jstrokecerebrovasdis.2017.08.035. Epub 2017 Sep 28.

PMID:
28967593
22.

Evaluation of Cerebrovascular Reactivity in Subjects with and without Obstructive Sleep Apnea.

Ryan CM, Battisti-Charbonney A, Sobczyk O, Mikulis DJ, Duffin J, Fisher JA, Venkatraghavan L.

J Stroke Cerebrovasc Dis. 2018 Jan;27(1):162-168. doi: 10.1016/j.jstrokecerebrovasdis.2017.08.015. Epub 2017 Sep 13.

PMID:
28918088
23.

A Novel Stress-Diathesis Model to Predict Risk of Post-operative Delirium: Implications for Intra-operative Management.

El-Gabalawy R, Patel R, Kilborn K, Blaney C, Hoban C, Ryner L, Funk D, Legaspi R, Fisher JA, Duffin J, Mikulis DJ, Mutch WAC.

Front Aging Neurosci. 2017 Aug 18;9:274. doi: 10.3389/fnagi.2017.00274. eCollection 2017.

24.

Mobile App to Streamline the Development of Wearable Sensor-Based Exercise Biofeedback Systems: System Development and Evaluation.

O'Reilly M, Duffin J, Ward T, Caulfield B.

JMIR Rehabil Assist Technol. 2017 Aug 21;4(2):e9. doi: 10.2196/rehab.7259.

25.

A non-invasive magnetic resonance imaging approach for assessment of real-time microcirculation dynamics.

Ganesh T, Estrada M, Yeger H, Duffin J, Cheng HM.

Sci Rep. 2017 Aug 7;7(1):7468. doi: 10.1038/s41598-017-06983-6.

26.

The role of vascular resistance in BOLD responses to progressive hypercapnia.

Duffin J, Sobczyk O, Crawley A, Poublanc J, Venkatraghavan L, Sam K, Mutch A, Mikulis D, Fisher J.

Hum Brain Mapp. 2017 Nov;38(11):5590-5602. doi: 10.1002/hbm.23751. Epub 2017 Aug 7.

PMID:
28782872
27.

Assessing cerebrovascular reactivity by the pattern of response to progressive hypercapnia.

Fisher JA, Sobczyk O, Crawley A, Poublanc J, Dufort P, Venkatraghavan L, Sam K, Mikulis D, Duffin J.

Hum Brain Mapp. 2017 Jul;38(7):3415-3427. doi: 10.1002/hbm.23598. Epub 2017 Apr 3.

PMID:
28370825
28.

Hospitals of Rome in the Early Nineteenth Century: The Apostolic Visit of 1825.

Duffin J.

Can Bull Med Hist. 2016 Fall;33(2):517-553. doi: 10.3138/cbmh.33.2.163-26062015. Epub 2016 Sep 7.

PMID:
28155425
29.

High quality epitaxial graphene by hydrogen-etching of 3C-SiC(111) thin-film on Si(111).

Mondelli P, Gupta B, Betti MG, Mariani C, Duffin JL, Motta N.

Nanotechnology. 2017 Mar 17;28(11):115601. doi: 10.1088/1361-6528/aa5a48. Epub 2017 Jan 18.

PMID:
28099157
30.

The interwoven history of mercury poisoning in Ontario and Japan.

Mosa A, Duffin J.

CMAJ. 2017 Feb 6;189(5):E213-E215. doi: 10.1503/cmaj.160943. Epub 2016 Dec 5. No abstract available. Erratum in: CMAJ. 2017 Mar 27;189(12 ):E475.

31.

Cerebrovascular reactivity and white matter integrity.

Sam K, Peltenburg B, Conklin J, Sobczyk O, Poublanc J, Crawley AP, Mandell DM, Venkatraghavan L, Duffin J, Fisher JA, Black SE, Mikulis DJ.

Neurology. 2016 Nov 29;87(22):2333-2339. Epub 2016 Oct 28.

32.
33.

Vascular Dysfunction in Leukoaraiosis.

Sam K, Crawley AP, Poublanc J, Conklin J, Sobczyk O, Mandell DM, Duffin J, Venkatraghavan L, Fisher JA, Black SE, Mikulis DJ.

AJNR Am J Neuroradiol. 2016 Dec;37(12):2258-2264. Epub 2016 Aug 4.

34.

Longitudinal Brain Magnetic Resonance Imaging CO2 Stress Testing in Individual Adolescent Sports-Related Concussion Patients: A Pilot Study.

Mutch WA, Ellis MJ, Ryner LN, Morissette MP, Pries PJ, Dufault B, Essig M, Mikulis DJ, Duffin J, Fisher JA.

Front Neurol. 2016 Jul 8;7:107. doi: 10.3389/fneur.2016.00107. eCollection 2016.

35.

Impaired dynamic cerebrovascular response to hypercapnia predicts development of white matter hyperintensities.

Sam K, Conklin J, Holmes KR, Sobczyk O, Poublanc J, Crawley AP, Mandell DM, Venkatraghavan L, Duffin J, Fisher JA, Black SE, Mikulis DJ.

Neuroimage Clin. 2016 May 14;11:796-801. doi: 10.1016/j.nicl.2016.05.008. eCollection 2016.

36.

Development of White Matter Hyperintensity Is Preceded by Reduced Cerebrovascular Reactivity.

Sam K, Crawley AP, Conklin J, Poublanc J, Sobczyk O, Mandell DM, Venkatraghavan L, Duffin J, Fisher JA, Black SE, Mikulis DJ.

Ann Neurol. 2016 Aug;80(2):277-85. doi: 10.1002/ana.24712.

PMID:
27352039
37.

The case for an essential medicines list for Canada.

Eom G, Grootendorst P, Duffin J.

CMAJ. 2016 Dec 6;188(17-18):E499-E503. doi: 10.1503/cmaj.160134. Epub 2016 Jun 13. No abstract available.

38.

Peter Beighton on Rapa Nui (Easter Island), 1964 - 1965.

Duffin J.

S Afr Med J. 2016 May 23;106(6 Suppl 1):S21-2. doi: 10.7196/SAMJ.2016.v106i6.10984. No abstract available.

PMID:
27245517
39.

Clamping end-tidal carbon dioxide during graded exercise with control of inspired oxygen.

Farra SD, Kessler C, Duffin J, Wells GD, Jacobs I.

Respir Physiol Neurobiol. 2016 Sep;231:28-36. doi: 10.1016/j.resp.2016.05.013. Epub 2016 May 26.

PMID:
27236039
40.

Neuroimaging Assessment of Cerebrovascular Reactivity in Concussion: Current Concepts, Methodological Considerations, and Review of the Literature.

Ellis MJ, Ryner LN, Sobczyk O, Fierstra J, Mikulis DJ, Fisher JA, Duffin J, Mutch WA.

Front Neurol. 2016 Apr 29;7:61. doi: 10.3389/fneur.2016.00061. eCollection 2016. Review.

41.

T2* and T1 assessment of abdominal tissue response to graded hypoxia and hypercapnia using a controlled gas mixing circuit for small animals.

Ganesh T, Estrada M, Duffin J, Cheng HL.

J Magn Reson Imaging. 2016 Aug;44(2):305-16. doi: 10.1002/jmri.25169. Epub 2016 Feb 13.

PMID:
26872559
42.

Identifying Significant Changes in Cerebrovascular Reactivity to Carbon Dioxide.

Sobczyk O, Crawley AP, Poublanc J, Sam K, Mandell DM, Mikulis DJ, Duffin J, Fisher JA.

AJNR Am J Neuroradiol. 2016 May;37(5):818-24. doi: 10.3174/ajnr.A4679. Epub 2016 Feb 4.

43.

Sequential gas delivery provides precise control of alveolar gas exchange.

Fisher JA, Iscoe S, Duffin J.

Respir Physiol Neurobiol. 2016 May;225:60-9. doi: 10.1016/j.resp.2016.01.004. Epub 2016 Feb 1. Review.

PMID:
26840836
44.

AltitudeOmics: Resetting of Cerebrovascular CO2 Reactivity Following Acclimatization to High Altitude.

Fan JL, Subudhi AW, Duffin J, Lovering AT, Roach RC, Kayser B.

Front Physiol. 2016 Jan 8;6:394. doi: 10.3389/fphys.2015.00394. eCollection 2015.

45.

Brain magnetic resonance imaging CO2 stress testing in adolescent postconcussion syndrome.

Mutch WA, Ellis MJ, Ryner LN, Graham MR, Dufault B, Gregson B, Hall T, Bunge M, Essig M, Fisher JA, Duffin J, Mikulis DJ; Canada North Concussion Network, and; University Health Network Cerebrovascular Reactivity Research Group.

J Neurosurg. 2016 Sep;125(3):648-60. doi: 10.3171/2015.6.JNS15972. Epub 2015 Dec 18.

PMID:
26684777
46.

Relationship between retinal blood flow and arterial oxygen.

Cheng RW, Yusof F, Tsui E, Jong M, Duffin J, Flanagan JG, Fisher JA, Hudson C.

J Physiol. 2016 Feb 1;594(3):625-40. doi: 10.1113/JP271182. Epub 2015 Dec 30.

47.

Limb movement frequency is a significant modulator of the ventilatory response during submaximal cycling exercise in humans.

Caterini JE, Duffin J, Wells GD.

Respir Physiol Neurobiol. 2016 Jan;220:10-6. doi: 10.1016/j.resp.2015.09.004. Epub 2015 Sep 11.

PMID:
26369445
48.

Measuring cerebrovascular reactivity: the dynamic response to a step hypercapnic stimulus.

Poublanc J, Crawley AP, Sobczyk O, Montandon G, Sam K, Mandell DM, Dufort P, Venkatraghavan L, Duffin J, Mikulis DJ, Fisher JA.

J Cereb Blood Flow Metab. 2015 Nov;35(11):1746-56. doi: 10.1038/jcbfm.2015.114. Epub 2015 Jul 1.

49.

The dynamics of cerebrovascular reactivity shown with transfer function analysis.

Duffin J, Sobczyk O, Crawley AP, Poublanc J, Mikulis DJ, Fisher JA.

Neuroimage. 2015 Jul 1;114:207-16. doi: 10.1016/j.neuroimage.2015.04.029. Epub 2015 Apr 16.

PMID:
25891374
50.

Oxygen dissociation curves in altitude and sea-level residents.

Duffin J.

Exp Physiol. 2015 Mar;100(3):341. doi: 10.1113/EP085007. No abstract available.

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