L A H Critchley

Summary

Affiliation: The Chinese University of Hong Kong
Country: China

Publications

  1. ncbi Evaluation of impedance based indices of cardiac contractility in dogs
    Zhi Yong Peng
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Shatin, Hong Kong, China
    J Clin Monit Comput 18:103-9. 2004
  2. ncbi Surgical emphysema as a cause of severe hypercapnia during laparoscopic surgery
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anaesth Intensive Care 38:1094-100. 2010
  3. doi USCOM-window to the circulation: utility of supra-sternal Doppler in an elderly anaesthetized patient for a robotic cystectomy
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    J Clin Monit Comput 28:83-93. 2014
  4. ncbi Non-invasive continuous arterial pressure, heart rate and stroke volume measurements during graded head-up tilt in normal man
    L A Critchley
    Departments of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Clin Auton Res 7:97-101. 1997
  5. ncbi The effect of peripheral resistance on impedance cardiography measurements in the anesthetized dog
    Lester A H Critchley
    Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anesth Analg 100:1708-12. 2005
  6. ncbi Testing the reliability of a new ultrasonic cardiac output monitor, the USCOM, by using aortic flowprobes in anesthetized dogs
    Lester A Critchley
    Department of Anesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    Anesth Analg 100:748-53, table of contents. 2005
  7. doi A critical review of the ability of continuous cardiac output monitors to measure trends in cardiac output
    Lester A Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anesth Analg 111:1180-92. 2010
  8. ncbi The effects of candesartan and ramipril on adrenal catecholamine release in anaesthetized dogs
    Lester Critchley
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Eur J Pharmacol 489:67-75. 2004
  9. ncbi Pre-operative hepatitis in a woman treated with Chinese medicines
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    Anaesthesia 58:1096-100. 2003
  10. pmc Pulse contour analysis: is it able to reliably detect changes in cardiac output in the haemodynamically unstable patient?
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR, China
    Crit Care 15:106. 2011

Collaborators

Detail Information

Publications35

  1. ncbi Evaluation of impedance based indices of cardiac contractility in dogs
    Zhi Yong Peng
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Shatin, Hong Kong, China
    J Clin Monit Comput 18:103-9. 2004
    ..These include the systolic time ratio (STR), the index of contracticity (IC), the acceleration index (ACI) and the Heather index. This study evaluates their reliability...
  2. ncbi Surgical emphysema as a cause of severe hypercapnia during laparoscopic surgery
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anaesth Intensive Care 38:1094-100. 2010
    ....
  3. doi USCOM-window to the circulation: utility of supra-sternal Doppler in an elderly anaesthetized patient for a robotic cystectomy
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    J Clin Monit Comput 28:83-93. 2014
    ..The supra-sternal route is rich in flow signals and identifying the aortic valve signal is paramount. Recognizing the other characteristic waveforms in the signal helps greatly. ..
  4. ncbi Non-invasive continuous arterial pressure, heart rate and stroke volume measurements during graded head-up tilt in normal man
    L A Critchley
    Departments of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Clin Auton Res 7:97-101. 1997
    ..In conclusion, HUT produces reproducible haemodynamic effects, although differences exist among subjects. A detailed analysis of these effects can be successfully performed using non-invasive methods...
  5. ncbi The effect of peripheral resistance on impedance cardiography measurements in the anesthetized dog
    Lester A H Critchley
    Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anesth Analg 100:1708-12. 2005
    ..The bias changed by 0.62 +/- 1.8 L/min, or by 34%, every time TPR halved or doubled. This finding explains the poor agreement between COIC and other methods of CO measurement found in validation studies involving critically ill patients...
  6. ncbi Testing the reliability of a new ultrasonic cardiac output monitor, the USCOM, by using aortic flowprobes in anesthetized dogs
    Lester A Critchley
    Department of Anesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    Anesth Analg 100:748-53, table of contents. 2005
    ..9. The USCOM provided reliable measurements of cardiac output over a wide range of values. Clinical trials are needed to validate the device in humans...
  7. doi A critical review of the ability of continuous cardiac output monitors to measure trends in cardiac output
    Lester A Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Anesth Analg 111:1180-92. 2010
    ..Agreement was shown by the angle with the horizontal axis and ΔCO by the distance from the center. Trending can be assessed by the vertical limits of the data, similar to the Bland and Altman method...
  8. ncbi The effects of candesartan and ramipril on adrenal catecholamine release in anaesthetized dogs
    Lester Critchley
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Eur J Pharmacol 489:67-75. 2004
    ..The percentage of noradrenaline released during electrical stimulation of the gland remained constant and ranged from 14% to 22%. Both drugs appear to act by blocking local modulation of catecholamine release by the chromaffin cells...
  9. ncbi Pre-operative hepatitis in a woman treated with Chinese medicines
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    Anaesthesia 58:1096-100. 2003
    ..The prescriptions contained over 60 different ingredients, some of which were known to be hepatotoxic, cytotoxic or to cause bleeding. This was the most likely explanation for her liver dysfunction...
  10. pmc Pulse contour analysis: is it able to reliably detect changes in cardiac output in the haemodynamically unstable patient?
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, SAR, China
    Crit Care 15:106. 2011
    ..None of the three methods demonstrated good trending ability according to concordance analysis. Pulse contour systems remain unreliable in the haemodynamically unstable patient...
  11. ncbi A meta-analysis of studies using bias and precision statistics to compare cardiac output measurement techniques
    L A Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    J Clin Monit Comput 15:85-91. 1999
    ..Bias and precision statistics have succeeded regression analysis when measurement techniques are compared. However, when applied to cardiac output measurements, inconsistencies occur in reporting the results of this form of analysis...
  12. doi Assessment of trending ability of cardiac output monitors by polar plot methodology
    Lester A Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    J Cardiothorac Vasc Anesth 25:536-46. 2011
    ..To develop a valid statistical method of showing acceptable cardiac output (CO) trending ability when new CO monitors are compared to a reference standard, such as thermodilution, using polar coordinates...
  13. ncbi A comparison of two impedance cardiographs using head-up tilting and trend analysis
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, People s Republic of China
    J Clin Monit Comput 17:153-60. 2002
    ..This involved a series of head-up tilts, a simulation of the stroke volume (SV) and cardiac output (CO) response, calculation of prediction errors and cumulative sums (Cusum)...
  14. ncbi The effect of lung injury and excessive lung fluid, on impedance cardiac output measurements, in the critically ill
    L A Critchley
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, People s Republic of China
    Intensive Care Med 26:679-85. 2000
    ..To investigate the relationship between the attenuation of impedance cardiac output (IC(co)) measurements and lung fluid content in critically ill patients...
  15. pmc Self-calibrating pulse contour cardiac output: do validation studies really show its clinical reliability?
    Lester A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, PR China
    Crit Care 13:123. 2009
    ..A more rigorous test of performance is needed before any real conclusion concerning use of the FloTrac/Vigileo in clinical practice can be made...
  16. ncbi An investigation to show the effect of lung fluid on impedance cardiac output in the anaesthetized dog
    Z Y Peng
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Shatin
    Br J Anaesth 95:458-64. 2005
    ..Accumulation of lung fluid in the critically ill patient is believed to attenuate impedance cardiac output (CO(IC)) measurements. However, this phenomenon has never been shown experimentally...
  17. doi Haemodynamic effects from aortocaval compression at different angles of lateral tilt in non-labouring term pregnant women
    S W Y Lee
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, PR China
    Br J Anaesth 109:950-6. 2012
    ..In this prospective observational study, we aimed to detect ACC by analysing haemodynamic changes in term parturients who were positioned sequentially at different angles of lateral tilt...
  18. ncbi A technique that may improve the reliability of endobronchial blocker positioning during adult one-lung anaesthesia
    A M H Ho
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR
    Anaesth Intensive Care 37:1012-6. 2009
    ....
  19. ncbi A survey of Chinese herbal medicine intake amongst preoperative patients in Hong Kong
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Anaesth Intensive Care 33:506-13. 2005
    ..6) and use ginseng (odds ratio 5.1). The anaesthetic implications of preoperative traditional Chinese medicine in keeping with Hong Kong practices need to be investigated, and appropriate anaesthetic guidelines should be developed...
  20. ncbi Fentanyl dosage and timing when inserting the laryngeal mask airway
    T H K Wong
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
    Anaesth Intensive Care 38:55-64. 2010
    ..An ideal dose of fentanyl that produces optimum insertion conditions could not be determined...
  21. doi Supplementary oxygen for emergency Caesarean section under regional anaesthesia
    K S Khaw
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, People s Republic of China
    Br J Anaesth 102:90-6. 2009
    ....
  22. ncbi Continuous thoracic paravertebral infusion of bupivacaine for pain management in patients with multiple fractured ribs
    Manoj K Karmakar
    Department of Anesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
    Chest 123:424-31. 2003
    ..To evaluate the efficacy of a continuous thoracic paravertebral infusion of bupivacaine for pain management in patients with unilateral multiple fractured ribs (MFR)...
  23. doi Study to determine the repeatability of supra-sternal Doppler (ultrasound cardiac output monitor) during general anaesthesia: effects of scan quality, flow volume, and increasing age
    L Huang
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Shatin, Hong Kong, China
    Br J Anaesth 111:907-15. 2013
    ..The aim of this study was to investigate the effect of age on supra-sternal USCOM scan repeatability during anaesthesia...
  24. doi Effects of different inspired oxygen fractions on lipid peroxidation during general anaesthesia for elective Caesarean section
    K S Khaw
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
    Br J Anaesth 105:355-60. 2010
    ..0. However, it is unclear whether such high Fi(o(2)) will increase oxygen free radical activity...
  25. ncbi Differences in the single-oral-dose pharmacokinetics and urinary excretion of paracetamol and its conjugates between Hong Kong Chinese and Caucasian subjects
    J A J H Critchley
    Division of Clinical Pharmacology, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    J Clin Pharm Ther 30:179-84. 2005
    ..The present study was conducted to determine if ethnic differences exist for single oral dose pharmacokinetics of paracetamol and its conjugates between Hong Kong Chinese and Caucasian subjects...
  26. doi Placing the tip of the endotracheal tube at the carina and passing the endobronchial blocker through the Murphy eye may reduce the risk of blocker retrograde dislodgement during one-lung anaesthesia in small children
    A M H Ho
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong SAR, People s Republic of China
    Br J Anaesth 101:690-3. 2008
    ..The tip of the ETT blocked any retrograde movement of the blocker...
  27. ncbi Right upper lobe collapse secondary to an anomalous bronchus after endotracheal intubation for routine surgery
    L A H Critchley
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
    Anaesth Intensive Care 35:274-7. 2007
    ..Intra-operatively, the endotracheal tube had been inserted too deeply and the bronchial orifice had been obstructed by the tip. It took several hours for the lung to re-expand. Greater awareness of this potential complication is needed...
  28. ncbi Averaging improves the quality of impedance stroke volume measurements during the head up tilt test
    Ye Zhang
    Division of Clinical Pharmacology, Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, PRC
    J Clin Monit Comput 17:187-93. 2002
    ..To assess the improvement in quality following averaging data from two or more tilts in the stroke volume (SV) response curve during a head-up tilt test...
  29. doi Correlation between supra-sternal Doppler cardiac output (USCOM) measurements and chest radiological features
    L Huang
    Department of Anaesthesia and Intensive Care, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China
    Anaesthesia 68:1156-60. 2013
    ..Morphological or anatomical changes associated with ageing within the upper chest play an important part in the success of using supra-sternal Doppler in older patients...
  30. ncbi General anaesthesia in a child with Larsen syndrome
    L A H Critchley
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong, China
    Anaesth Intensive Care 31:217-20. 2003
    ..Anaesthesia was well tolerated though intubation proved difficult. Cervical spine instability and postoperative respiratory complications are potential problems...
  31. ncbi The effects of increasing doses of noradrenaline on systemic and renal circulations in acute bacteraemic dogs
    Zhi Yong Peng
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
    Intensive Care Med 31:1558-63. 2005
    ..To determine the dose-response effects of noradrenaline on the systemic and renal circulations during septic shock...
  32. doi Timing of tracheal intubation in traumatic cardiac tamponade: a word of caution
    Anthony M H Ho
    Department of Anaesthesia and Intensive Care, Chinese University of Hong Kong, Hong Kong SAR, People s Republic of China
    Resuscitation 80:272-4. 2009
    ..In the trauma setting, emergency thoracotomy is the best approach. When intubation is unavoidable because of very low oxygen saturation or cardiac arrest, high ventilatory pressures should be avoided...
  33. ncbi Co-administration of alfentanil-propofol improves laryngeal mask airway insertion compared to fentanyl-propofol
    Jacqueline K L Hui
    Department of Anaesthesia Intensive Care, The Chinese University of Hong Kong Prince, of Wales Hospital, Shatin, New Territories, Hong Kong, Peoples Republic of China
    Can J Anaesth 49:508-12. 2002
    ..We therefore compared the insertion conditions following co-administration of alfentanil-propofol with more commonly used fentanyl-propofol...
  34. ncbi Alfentanil dosage when inserting the classic laryngeal mask airway
    Andrea L Y Yu
    Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
    Anesthesiology 105:684-8. 2006
    ..The purpose of this study was to determine an optimum dose of alfentanil, coadministered with 2.5 mg/kg propofol, when inserting a classic laryngeal mask airway...
  35. ncbi Images in anesthesia: Airway obstruction after peanut aspiration--air trapping is due to airway distension and narrowing
    Anthony M H Ho
    Can J Anaesth 52:205-6. 2005