Faculty of Medicine,
The Chinese University of Hong Kong

Prof. KARMAKAR Manoj

PROFESSOR

Prof. KARMAKAR Manoj

MBBS,MD, FRCA, DA(UK), FHKCA, FHKAM(Anaesthesiology)

Professor,
Consultant Anesthesiologist (Hon), Director of Paediatric Anaesthesia

Department of Anaesthesia and Intensive Care
The Chinese University of Hong Kong

Honorary Consultant
Prince of Wales Hospital
Shatin, NT, Hong Kong SAR

Adjunct Professor of Anesthesiology

University of Indonesia (Universitas Indonesia),

Cipto Mangunkusumo Hospital,
Jakarta, Indonesia.

Adjunct Professor of Anesthesiology

Department of Anestesiology and Reanimation,
Faculty of Medicine, Universitas Airlangga,
Surubaya, Indonesia.

Main Research Interests – Field of Specialism

Adult Anaesthesia

  • Ultrasound Guided Central Neuraxial Blocks
  • Thoracic Paravertebral Block in Anaesthetic Practice
  • Pain Management following Thoracic Trauma
  • Clinical Pharmacology of local Anaesthetic Agents
  • Regional Anaesthesia for Major Breast Surgery
  • Regional anaesthesia and its effects on Chronic pain generation and
  • Quality of Life after major breast surgery
  • Ultrasound Guided Peripheral Nerve Blocks
  • Spinal Sonography in Regional Anaesthesia

Paediatric Anaesthesia

  • Regional Anaesthesia in children.
  • Thoracic paravertebral blockade in children.
  • Local anaesthetic pharmacology in children.
  • Ultrasound guided regional anaesthesia (peripheral and central neuraxial blocks) in children.

For more details about my academic profile, see:
SCOPUS Author ID: 7003694275 (https://orcid.org/0000-0002-3674-2095)
Researcher ID: J-9370-2013 (http://www.researcherid.com/rid/J-9370-2013)
ORCID ID: 0000-0002-3674-2095

Prof. KARMAKAR Manoj

Publications
For details about citations arising from my publications and links to online versions of some of the publications, refer to:
http://www.researcherid.com/rid/J-9370-2013 (Researcher ID:J-9370-2013)

  • Karmakar MK, Lönnqvist PA. The clinical use of the thoracic erector spinae plane block. Con – ESPB is not useful for thoracic analgesia. J Clin Anesth. Vol 93, May 2024, 111353. https://doi.org/10.1016/j.jclinane.2023.111353 (Pro-Con Article – Con)
  • Sivakumar RK, Lukanachanthachote C, Karmakar MK. Differential Nerve Blockade to Explain Anterior Thoracic Analgesia Without Sensory Blockade After an Erector Spinae Plane Block May be Wishful Thinking. Reg Anesth Pain Med. 2024 Jul 8;49(7):536-539.doi:10.1136/rapm-2023105243. PMID: 38253613. (Corresponding Author).
  • Karmakar MK, Pakpirom J, Sivakumar RK, Samy W. Ultrasound-guided thoracic paravertebral block using a transverse in-plane approach at the level of the inferior articular process: a retrospective review of complications. Reg Anesth Pain Med. 2023 Jan 4;rapm-2022-103983. doi: 10.1136/rapm-2022-103983. Online ahead of print (Research report, Principal Investigator, Corresponding Author).
  • Sivakumar RK, Karmakar MK. Variable Anterior Spread of Local Anesthetic after Erector Spinae Plane Block (ESPB): Time to Turn the Spotlight on the ‘Retro-SCTL space’. Reg Anesth Pain Med. 2023 doi: 1136/rapm-2023-104362. Online ahead of print (Correspondence, Corresponding Author).
  • Sivakumar RK, Karmakar MK. A Modified First-targeted Ultrasound Window Only May Not Reduce the Incidence of Hemidiaphragmatic Involvement After a Selective trunk block (SeTB). Eur J Anaesthesiol. 2023 Jun 1;40(6):451-452. doi: 10.1097/EJA.0000000000001826. (Correspondence, Corresponding Author).
  • Sivakumar RK, Karmakar MK. Reply: ‘Clarification sought on retro-SCTL space’. Reg Anesth Pain Med. 2023. doi: 10.1136/rapm-2023-104512. Online ahead of print. (Correspondence, Corresponding Author).
  • Sivakumar RK, Karmakar MK. Spinal Sonography and Central Neuraxial Blocks. Best Practice & Research Clinical Anaesthesiology. 2023; 37: 209-242 DOI: https://doi.org/10.1016/j.bpa.2023.04.008, Online ahead of print, Available online 21 April 2023, (Review, Corresponding Author).
  • Lönnqvist PA, Karmakar MK, Sivakumar RK. The mechanism of action of erector spinae plane block is not enigmatic: it is intravenous local anaesthetic effect by proxy. Br J Anaesth. 2023 Sep;131(3):e62-e64. doi: 10.1016/j.bja.2023.05.020. Epub 2023 Jun 15.PMID: 37330309 (Correspondence).
  • Karmakar MK, Sivakumar RK, Sheah K, Pangthipampai P, Lonnqvist PA. Quest for The Elusive Mechanism of Action for the Thoracic Paraspinal Nerve Block Techniques. Are we Ignoring the Anatomy of the “Retro Superior Costotransverse Ligament Space?” Anesth Analg. 2023 Aug 1;137(2):458-465. doi: 10.1213/ANE.0000000000006462. Epub 2023 Jul 14. PMID: 37450909 (Review, Corresponding Author).
  • Pangthipampai P, Siriwanarangsun P, Pakpirom J, Sivakumar RK, Karmakar MK. Intertransverse process block at the retro-SCTL space: evaluation of injectate spread using MRI and sensory blockade in healthy Reg Anesth Pain Med. 2023; 48(Suppl 1): A31-A32 (Published Abstract)
  • Pakpirom J, Sivakumar RK, Karmakar MK. Subparaneural sciatic nerve block above and below its divergence at the popliteal fossa: a randomized double-blind study. Reg Anesth Pain Med. 2023; 48(Suppl 1): A69-A69 (Published Abstract)
  • Sivakumar RK, Karmakar MK, Cheung CK. Sensory block dynamics of a multi- level intertransverse process block at the retro-sctl space: a case series. Reg Anesth Pain Med. 2023; 48(Suppl 1): A352-A352 (Published Abstract)
  • Songthamwat B, Luangjarmekorn P, Kampitak W, Sivakumar RK, Karmakar MK. Ultrasound Guided Selective Trunk Block (SeTB): Ultrasound-guided selective trunk block (SeTB): a cadaver anatomic study to evaluate the spread of dye after a simulated injection. Reg Anesth Pain Med. 2022;47:414-419, Published Online First: 21st April 2022. doi: 10.1136/rapm-2022-103630. (Original Research, Principal Investigator, Corresponding Author). (https://rapm.bmj.com/content/early/2022/04/21/rapm-2022-103630 ) 
  • Pakpirom J, Thatsanapornsathit K, Kovitwanawong N, Petsakul S, Benjhawaleemas P, Narunart K, Boonchuduang S, Karmakar MK. Real-time ultrasound-guided versus anatomic landmark-based thoracic epidural placement: a prospective randomized superiority trial. BMC Anesthesiology. June 2022; 22:198. doi: 10.1097/EJA.0000000000001723, PMID: 36101909. https://doi.org/10.1186/s12871-022-01730-5. (Original Research, Corresponding Author). 
  • Sivakumar RK, Areeruk P, Mok LYH, Samy W, Karmakar MK. Real-time Ultrasound Guided Spinal Injection Using a Transverse In-plane Dependent (TIPD) Technique. A Case Series. A&A Practice. 2022; 16(7): e01596, July 2022 doi: 10.1213/XAA.0000000000001596, PMID: 35822867 (Cohort study, Principal Investigator, Corresponding Author).
  • Karmakar MK, Sivakumar RK, Sheah K, Pangthipampai P, Lönnqvist PA. The Retro Superior Costotransverse Ligament Space as a New Target For Ultrasound- guided Intertransverse Process Block. A Report of 2 Cases. A&A Practice. 2022; 16(7):e01610, July 2022 doi: 10.1213/XAA.0000000000001610. PMID: (Case report, Corresponding Author).
  • Sivakumar RK, Karmakar MK, Reina MA, Sala-Blanch X. High-Definition Ultrasound Imaging of the Paraneural Sheath and Fascial Compartments Surrounding the Brachial Plexus at the Supraclavicular Fossa. Reg Anesth Pain Med. 2022 Aug 16:rapm-2022-103822. doi: 10.1136/rapm-2022-103822. Online ahead of print. PMID: 35973780. (Research Report, Principal Investigator, Corresponding Author).
  • Areeruk P, Sivakumar RK, Somani S. Samy W, Karmakar MK. Regional Tissue Oxygen Saturation after Costoclavicular Brachial Plexus Block: A Prospective Non- Randomised Study of Intervention. Eur J of Anaesthesiol. 2022; 39 (10): 837-839 Oct 01 PMID: 36101909; DOI: 1097/EJA.0000000000001723 (Research report, Principal Investigator, Corresponding Author).
  • Sivakumar RK, Samy W, Pakpirom J, Songthamwat B, Karmakar MK. Ultrasound- Guided Selective Trunk Block: A Single-centre Cohort Study Evaluating Ipsilateral Sensorimotor Block Dynamics, Hemidiaphragmatic Function, and Efficacy as an All-purpose Anesthetic Technique for Upper Extremity Surgery. Eur J Anaesthesiol. 2022 Oct 1;39(10):801-809. doi: 10.1097/EJA.0000000000001736. Epub 2022 Aug (Cohort study, Principal Investigator, Corresponding Author).
 
  • Sivakumar RK, Areeruk P, Karmakar MK. Aberrant vascular anatomy at the costoclavicular space: a word of caution for costoclavicular brachial plexus block. Reg Anesth Pain Med. 2021 Jan;46(1):95-96. doi: 10.1136/rapm-2020-101498. Epub 2020 Apr 20. PMID: 32317294 (Letter-to-editor, Corresponding Author)
  • Lönnqvist PA, Karmakar MK, Richardson JR, Moriggl Daring discourse: Should the ESP block be re-named RIP II block? Reg Anesth Pain Med. 2021 Jan;46(1):57- 60. doi: 10.1136/rapm-2020-101822. Epub 2020 Sep 14. PMID: 32928991. 
  • Somani S, Areeruk P, Mok LYH, Samy W, Sivakumar RK, Karmakar MK. Dry Spinal Tap during Real Time Ultrasound Guided Paramedian Spinal Injection with the Patient in the Lateral Decubitus Position: A Single Centre Retrospective Study. Eur J Anaesthesiol. 2021 Mar 1;38(3):259-264, doi:10.1097/ EJA.0000000000001397. Online ahead of print. PMID: 33229872. (Original Research, Principal Investigator, Corresponding Author). 
  • Songthamwat B, Pakpirom J, Pangthipampai P, Vorapaluk P, Karmakar MK. Reliability of a sequential ultrasound imaging technique (SUIT) to identify the individual elements of the brachial plexus above the Reg Anesth Pain Med. 2021 May 5; rapm-2021-102701. doi: 10.1136/rapm-2021-102701. PMID: 33952686 (Original Research, Principal Investigator, Corresponding Author).
  • Areeruk P, Karmakar MK, Reina MA, Mok LYH, Sivakumar RK, Sala-Blanch X. High-Definition Ultrasound Imaging Defines the Paraneural Sheath and Fascial Compartments Surrounding the Cords of the Brachial Plexus at the Costoclavicular Space and Lateral Infraclavicular Fossa. Reg Anesth Pain Med. 2021 Jun; 46(6): 500-506. PMID: 33811182 (Original Research, Principal Investigator, Corresponding Author).
  • El-Boghdadly K, Karmakar MK et al. Standardizing nomenclature in regional anesthesia: an ASRA-ESRA Delphi consensus study of abdominal wall, paraspinal and chest wall blocks. Reg Anesth Pain Med. 2021 Jul;46(7):571-580. doi: 10.1136/rapm-2020-102451. PMID: 34145070. (Original Research)
  • Ho AM-H, Ho AK, Mizubuti GB, Klar G, Karmakar MK. Regional Analgesia for Patients with Traumatic Rib Fractures – A Narrative Review, Journal of Trauma and Acute Care Surgery 2020 Jan; 88(1): e22-e30.doi: 1097/TA. 0000000000002524. PMID: 31688827. (Review) 
  • Lönnqvist PA, Karmakar M. Response to Comments on our Editorial. Acta Anaesthesiol 2020 Feb;64(2):277. doi: 10.1111/aas.13510. Epub 2019 Dec 3. PMID: 31730235. (Letter-to-editor).
  • Karmakar MK, Pakpirom J, Songthamwat B, Areeruk High Definition Ultrasound Imaging of the Individual Elements of the Brachial Plexus Above the Clavicle. Reg Anesth Pain Med. 2020 May;45(5):344-350. doi: 10.1136/rapm-2019-101089. Epub 2020 Feb 25, PMID: 32102798. (Original Research, Principal Investigator, Corresponding Author).
  • Sivashanmugam T, Maurya I, Kumar N, Karmakar MK. Reply to: ipsilateral hemidiaphragmatic paresis after a supraclavicular and costoclavicular brachialbplexus block. Eur J Anaesthesiol. 2020 May;37(5):417-418, PMID: 32265397. (Letter-to-editor)
  • Sivakumar RK, Areeruk P, Karmakar MK. Selective Trunk Block (SeTB): A Simple Alternative to Hybrid Brachial Plexus Block Techniques for Proximal Humeral Fracture Surgery during the Covid-19 Pandemic. Reg Anesth Pain Med. 2020 Jun 9:rapm-2020-101733. doi: 1136/rapm-2020-101733. Online ahead of print. PMID: 32522860 (Letter-to-editor, Corresponding Author) 
  • Lönnqvist PA, Karmakar MK. Accumulating Marginal Gains. Reg Anesth Pain Med. 2020 Jun 21:rapm-2020-101719. doi: 10.1136/rapm-2020-101719. Online ahead of print. PMID: 32565423 (Letter-to-editor)
  • Pangthipampai P, Karmakar MK, Songthamwat B, Pakpirom J, Samy W. Ultrasound-Guided Multilevel Thoracic Paravertebral Block and Its Efficacy for Surgical Anesthesia during Primary Breast Cancer Surgery: A Prospective Observational Cohort Journal of Pain Research. 2020 July; 13: 1713-1723, doi: 10.2147/JPR.S246406. PMID: 32765047 (Original Research, Principal Investigator, Corresponding Author)(https://www.dovepress.com/ultrasound-guided-multilevel-thoracic-paravertebral- block-and-its-effi-peer-reviewed-article-JPR)
  • Ashokka B, Chakraborty A, Subramaniam BJ, Karmakar MK, Chan V. Reconfiguring the scope and practice of regional anesthesia in a pandemic: The COVID-19 perspective. Reg Anesth Pain Med. 2020, Jul;45(7):536-543. doi: 10.1136/rapm-2020-101541. Epub 2020 May 28. PMID: 32471930. (Education Review Article). 
  • Karmakar MK, Areeruk P, Mok LYH, Sivakumar Ultrasound Guided Selective Trunk Block to Produce Surgical Anesthesia of the Whole Upper Extremity – A Case Report. A&A Practice. 2020 July; 14(9): e01274 (Corresponding Author) (https://journals.lww.com/aacr/fulltext/2020/07000/ultrasound_guided_selective_tr unk_block_to_produce.22.aspx)
  • Wong MH, Karmakar MK, Mok LYH, Songthamwat B, Samy W. Minimum Effective Volume of 0.5% w/v Ropivacaine for Ultrasound-Guided Costoclavicular Brachial Plexus Block: A Dose Finding Study. Eur J Anaesthesiol. 2020 Sep;37(9):780-786. doi: 10.1097/EJA.0000000000001287. PMID: 32740321. (Original Research, Principal Investigator, Corresponding Author)
  • Karmakar MK, Reina MA, Sivakumar RK, Areeruk P, Pakpirom J, Sala-Blanch X. Ultrasound Guided Subparaneural Popliteal Sciatic Nerve Block: There is More to It Than Meets the Eyes. Reg Anesth Pain Med. 2021 Mar;46(3):268-275. doi: 10.1136/rapm-2020-101709. Epub 2020 Oct 19. PMID: 33077429. (Review, Corresponding Author). 
  • Lönnqvist PA, Karmakar MK, Richardson JR, Moriggl B. Response to comments by Dr Forero to our daring discourse. Reg Anesth Pain Med 2020 Nov 17; rapm- 2020-102216. doi: 10.1136/rapm-2020-102216. Online ahead of print. PMID: 33203710. (Letter-to-editor).
  • Lönnqvist PA, Karmakar MK, Richardson JR, Moriggl B. Response to Dr. Howle and colleagues. Reg Anesth Pain Med. 2020 Nov 11:rapm-2020-102254. doi: 10.1136/rapm-2020-102254. Online ahead of print. PMID: 33177218. (Letter-to- editor).
  • Areeruk P, Sivakumar RK, Karmakar MK. Brachial plexus blockade with anomalous location of the T1 ventral ramus at the supraclavicular fossa. Br J Anaesth. 2020 Nov;125(5):e412-e414. doi: 10.1016/j.bja.2020.07.023. Epub 2020 Aug 20. PMID: 32828490. (Letter-to-editor, Corresponding Author)
  • Pawinee Pangthipampai P, Tangwiwat S, Jatuporn Pakpirom J, Songthamwat B, Karmakar MK. Ultrasound Visualization of the Anatomy Relevant for Lumbar Plexus Block: Comparison of the Paramedian Transverse and Shamrock Scan Technique. Reg Anesth Pain Med. 2019 Mar; 44:573–577 (Original Research, Corresponding Author).
  • Lönnqvist PA, Karmakar M. Close-to-the-nerve vs. Interfascial Plane Blocks: Sniper rifle vs. shotgun – which will hit the target most reliably? Acta Anaesthesiologica Scandinavica. 2019 Oct;63(9):1126-1128. doi: 10.1111/aas.13438. Epub 2019 Jul 23. PMID: 31283833 (Letter-to-editor)
  • Sivashanmugam T, Maurya I, Kumar N, Karmakar MK. Ipsilateral hemidiaphragmatic paresis after a supraclavicular and costoclavicular brachial plexus block: A randomized observer blinded study. Eur J Anesthesiol. 2019; Oct; 36(10): 787-795. doi: 10.1097/EJA. 0000000000001069. PMID: 31397702. (Original Research, Corresponding Author)
  • Beh ZY, Osman A, Fathil S, Karmakar MK. Ultrasound guided interscalene brachial plexus block with low dose sedation – Technique of choice for reducing shoulder dislocation. Am J Emerg Med. 2018 S0735-6757(18) 30013-5. (Original Research)
  • Karmakar MK, Sala-Blanch X. Ultrasound guided axillary tunnel block revisited – Reply to Dr. Cornish. (Letter-to-Editor) Reg Anesth Pain Med. 2018 April; 43(3):337-338 (Corresponding Author).
  • Songthamwat B, Karmakar MK, Li JW, Samy W, Mok LYH. Ultrasound Guided Infraclavicular Brachial Block: Prospective Randomized Comparison of the Lateral Sagittal and Costoclavicular Approach. Reg Anesth Pain Med. 2018; 43(8): 825- 831. (Original Research, Corresponding Author)
  • Chang KV, Lin CP, Lin CS, Wu WT, Karmakar MK, Özçakar L. Sonographic tracking of trunk nerves: essential for ultrasound-guided pain management and research. J Pain Res. 2017 Jan 4;10:79-88. (Original Research) 
  • Pangthipampai P, Karmakar MK, Songthamwat B, Pakpirom J. The accuracy of 7th cervical spinous process identification using ultrasound transverse scan and parasagittal scan compared to palpation technique. J Med Assoc Thai 2017; 100(Suppl. 7): S173-S179. (Original Research) 
  • Li JW, Songthamwat B, Samy W, Karmakar MK. Ultrasound Guided Costoclavicular Brachial Plexus Block: Sonoanatomy, Technique and Block Dynamics. Reg Anesth Pain Med. 2017;42: 233–240 (Original Research, Corresponding Author)
  • Karmakar MK, Samy W, Lee A, Li JW, Chan WC, Chen PP, Tsui B. Survival analysis of patients with breast cancer undergoing a modified radical mastectomy with or without a thoracic paravertebral block: a 5-year follow-up of a randomized controlled trial” Anticancer Research. 2017 Oct;37(10):5813-5820 (Original Research, Principal Investigator)
  • Keplinger M, Marhofer P, Eppel W, Macholz F, Hachemian N, Karmakar MK, Marhofer D, Klug W, Kettner Lumbar neuraxial anatomical changes throughout pregnancy: a longitudinal study using serial ultrasound scans. Anaesthesia. 2016 Jun;71(6):669-74. (Original Research) 
  • Sala-Blanch X, Reina MA, Pangthipampai P, Karmakar MK. Anatomic Basis for Brachial Plexus Block at the Costoclavicular Space: A cadaver Anatomic Study. Reg Anesth Pain Med. 2016; 41(3): 387-381 (Corresponding Author)
  • Ho AMH, Karmakar MK, Ng SK, Wan S, Ng CSH, Wong RHL, Chan SKC, Joynt GM. Local anesthetic toxicity after bilateral thoracic paravertebral block in patients undergoing coronary artery bypass surgery. Anaesth Intensive Care. 2016; 44(5): 615-619. (Original Research) 
  • Vazin M, Jensen K, Kristensen DL, Hjort M, Tanggaard K, Karmakar MK, Bendtsen TF, Borglum J. Low-Volume Brachial Plexus Block Providing Surgical Anesthesia for Distal Arm Surgery Comparing Supraclavicular, Infraclavicular, and Axillary Approach: A Randomized Observer Blind Trial. Biomed Res Int. 2016; 2016:7094121. (Original Research)
  • Karmakar M.K, Booker P.D, Franks R and Pozzi M. Continuous extrapleural paravertebral infusion of bupivacaine for post-thoracotomy analgesia in young infants. British Journal of Anaesthesia 1996; 76: 811 –
  • Karmakar MK, Booker PD and Franks R. Bilateral Paravertebral infusion of bupivacaine for post-thoracotomy analgesia in a young infant. Paediatric Anaesthesia 1997; 7: 469-471.
  • Karmakar MK and Critchley L. Continuous extrapleural intercostal nerve block for post thoracotomy analgesia in Anaesth Intensive Care 1998; 26: 115-118. (Letter)
  • Critchley LAH, Karmakar MK, Cheng JHH, Critchley JAJH. A study to determine the optimum dose of metaraminol required to increase blood pressure by 25% during subarachnoid anaesthesia. Anaesth Intensive Care 1999;27: 170-174. 
  • Karmakar MK, Aun CST, Wong ELY, Wong ASY, Chan SKS, Yeung CK. Systemic absorption of ropivacaine and bupivacaine following caudal epidural administration in children. The International Monitor on Regional Anaesthesia and Pain Therapy. 2000; 12(3): 271 (Abstract)
  • Karmakar MK. Paravertebral somatic nerve block for outpatient inguinal herniorrhaphy. Reg Anesth Pain Med. 1999; 24: 96-97(Letter) 
  • Karmakar M.K, Kwok W.H., Kew J. Thoracic paravertebral block: radiological evidence of contralateral spread anterior to the vertebral bodies. British Journal of Anaesthesia. 2000, Feb, 84(2): 263-5.
  • Karmakar M.K, Chung D.C. Variability of a thoracic paravertebral block. Are we ignoring the endothoracic fascia? Reg Anesth Pain Med 2000; 25(3): 325- 327(Letter) 
  • Karmakar M.K, Chui PT, Joynt GM, Ho A M.-H. Thoracic paravertebral block for management of pain associated with multiple fractured ribs in patients with concomitant lumbar spinal injury. Reg Anesth Pain Med 2001; 26(2): 169-173 (This article was also selected by the Dannemiller Memorial Educational Foundation to be published in the accredited educational journal, Analgesia ) 
  • Karmakar MK. Lymphatic drainage of the thoracic paravertebral space – A reply. British Journal of Anaesthesia 2001; 86(3): 453-4.(Letter) 
  • Ho AM-H, Karmakar MK, Contardi LH, Ng SS, Hewson JR. Excessive use of normal saline in managing traumatized patients in shock – A preventable contributor to acidosis. The Journal of Trauma. 2001; 51(1): 173-7.
  • Ho AMH, Karmakar MK. Simple formulas for preparing local anaesthetic infusion solutions (letter). Reg Anesth Pain Med. 2001; 26(4):382-3. (Letter)
  • Ho A.M.-H, Lee A, Karmakar M.K, Dion P, Chung D.C, Contradi L.H. Use of Heliox in acute obstructive lung disease – A systematic overview. Minerva Anestesiologica. 2001; 67(1):
  • Karmakar MK, Gin T, Ho AM-H. Ipsilateral thoraco-lumbar anaesthesia and paravertebral spread after low thoracic paravertebral injection. British Journal of Anaesthesia 2001; 87(2): 312-16.
  • Ho AM, Dion P, Karmakar MK, Cheng G, Derrick JL, Chung DC, Tay BA. A pharmacokinetic model for factor VIII dosing during active haemorrhage in patients with haemophilia A. Anaesthesia 2001 Aug;56(8):785-790
  • Karmakar MK. Thoracic paravertebral block. (Review) Anesthesiology 2001 Sept; 95(3):771-80.
  • Hui KL; Critchley LAH; Karmakar MK and LAM Kwok Key. “Laryngeal Mask Insertion Using  Alfentanil-Propofol”.  Anaesthesia and Intensive Care 2001; .29(.6):.647-648.
  • Ho AMH, Dion PW, Karmakar MK, Chung DC, Tay BA. Use of heliox in critical upper airway obstruction. Physical and physiologic considerations in choosing the optimal helium:oxygen mix. Resuscitation 2002 Mar;52(3):297-300.
  • Karmakar MK, Aun CST, Wong ELY, Wong ASY, Chan SKC, Yeung CK. Ropivacaine Undergoes Slower Systemic Absorption from the Caudal Epidural Space in Children than Bupivacaine. Anesth Analgesia. 2002; 94: 259-65. This article was selected for publication in the Year Book of Anesthesia 2003, Mosby-Year Book, Inc, St Louis, USA.)
  • Ho AM-H, Dion PW, Karmakar MK. Estimating with confidence the risk of rare adverse events, including those with observed rates of zero. Reg Anesth Pain Med 2002 April; 27(2): 207-210.
  • Ho AM-H, Aun CST. Karmakar MK. The margin of safety associated with the use of cuffed paediatric tracheal tubes. Anaesthesia 2002; 57: 173-175.
  • Chan SKC, Karmakar MK, Chui PT. Local anaesthesia outside the operating room. (Review) Hong Kong Medical Journal 2002; 8(2): 106-113.
  • Ho A.M.-H, Lim H.S, Yim A.P.C, Karmakar MK, Lee TW. Resolution of ST- segment depressions after high right thoracic paravertebral block during general anesthesia. Anesth Analg. 2002 Jul;95(1):227-8.
  • Hui JK, Critchley LA, Karmakar MK, Lam K.K. Co-administration of alfentanil- propofol improves laryngeal mask airway insertion compared to fentanyl-propofol. Canadian Journal of Anaesthesia. 2002 May;49(5):508-12.
  • Ho A.M.-H, Karmakar M.K. Combined paravertebral lumbar plexus and parasacral sciatic nerve block for reduction of hip fracture in a patient with severe aortic stenosis. Canadian Journal of Anaesthesia. 2002; 49(9): 946-50.
  • Ho A.M.-H, Fung K.Y, Joynt G.M, Karmakar M.K. Rigid cervical collar and Intracranial pressures of patients with severe head injury. J of Trauma. 2002; 53: 1185-88.
  • Karmakar MK. The use of a nerve stimulator for thoracic paravertebral Anaesthesiology. 2002; 97(2): 521-2. (Letter)
  • Karmakar MK, Ho AM-H, Law KB, Gin T, Chung CK, Wong ASY, Ng F. Pharmacokinetics of ropivacaine after thoracic paravertebral block. The International Monitor on Regional Anaesthesia and Pain Therapy. 2002; 14(2): 40.
  • Ho AM-H, Aun CST, Karmakar MK. Margin of safety for the uncuffed tracheal Anaesthesia 2002, Sept; 57(9): 936. (Letter) 
  • Lee BB, Ngan Kee WD, Plummer JL, Karmakar MK, Wong AS. The effect of the addition of epinephrine on early systemic absorption of epidural ropivacaine in humans. Anesth Analg 2002 Nov;95(5):1402-7.
  • Ho AM-H, Karmakar MK. Vascular injury secondary to dilator insertion during internal jugular Cannulation. Anesth Analg 2003; 96: 907-16.
  • Karmakar MK, Critchley LAH, Ho AM-H, Gin T, Lee TW, Yim APC. Continuous thoracic paravertebral infusion of bupivacaine for pain management in patients with multiple fractured ribs. Chest. 2003; 123(2): 424-31 
  • Ho A.M.-H, Lee A, Karmakar M.K, Dion PW, Chung D.C, Contradi L.H. Heliox vs. Air-oxygen mixtures for the treatment of patients with acute asthma: A systematic overview. Chest 2003; 123(3): 882-890.
  • Ho AM-H, Lee A, Chan SKC, Ng SK, Karmakar MK. The timing for the use of heparinase and thombelastography to prevent excessive bleeding after coronary artery bypass graft surgery. J Cardiothorac Vasc Anesth. 2003; 17(3): 413-414.
  • Karmakar MK, Ho AM-H. Acute pain management of patients with multiple fractured ribs. J of Trauma 2003; 54: 615-25.
  • Ho AM-H, Dion PW, Karmakar MK. Use of recombinant activated factor VII in patients with severe coagulopathy and Anesthesiology. 2003; 98(4): 1025- 1026. (Letter)
  • Wong CP, Chui PT, Karmakar MK. Facial skin injuries caused by adhesive tapes in a patient receiving cosmetic skin Anesth Analg. 2003 Nov;97(5):1310-1
  • Ho AM-H, Chung DD, Karmakar MK, Ng SK, Joynt GM, Arifi AA, Wan S, Yim Bilateral Thoracic Paravertebral Block in Coronary Artery Bypass Surgery. Reg Anesth Pain Med 2003; 28: A13. (Abstract)
  • Ho AM-H, Chung DC, Karmakar MK. Is the parker flex-tip tube really superior to the standard tube for fiberoptic oral intubation? Anesthesiology 2003 Nov; 99: (Letter)
  • Ho AM-H, Lam GCS, Karmakar MK. Potential eye injury due to protective face shield. Anesthesiology. 2004 Jan; 100: 201. (Letter)
  • Ho AM, Griffith JF, Joynt GM, Yeung JH, Karmakar MK, Ramsay SJ. Cardiac tamponade and sternal fracture. J Trauma. 2004 Jan;56(1):212-3. (Letter)
  • Ho AM, Karmakar MK, Dion On research and originality. Anaesthesia. 2004 Apr;59(4):404-5. (Letter)
  • Karmakar MK, Ho AM-H. Epidural spread depends on the approach used for posterior lumbar plexus block – Reply. Can J Anaesth. 2004 May;51(5):517. (Letter) 
  • Ho AM-H; Karmakar MK; Lee A; Samy W; Yi Jie; Lai Bo San Paul and Cho Mun Wai Amy. “The International Normalized  Ratio  Before  and  After Hepatectomy”. Canadian Journal of Anesthesia 2004; 51 p.A33. (Abstract)
  • Ho AM-H, Karmakar MK, Lam WWM, Lam FO, Lee TW, Ng SK, Chung DC. Does the presence of a tracheal bronchus affect the margin of safety of double-lumen tube placement? Anesth Analg.2004 July; 99: 293-5. 
  • Ho AM, Karmakar MK, Cheung M, Lam Right thoracic paravertebral analgesia for hepatectomy. Br J Anaesth. 2004; 93(3): 458-61.
  • Karmakar MK, Ho AMH. Postthoracotomy pain syndrome. Thoracic Surgery Clinics. 2004 (Aug); 14(3): 345-52
  • Ho AM-H, Chung DC, To EWH, Karmakar MK. Total airway obstruction during local anaesthesia in a non-sedated patient with compromised Can J Anaesth. 2004; 51(8): 838-841.
  • Lam Kar Yee Katherine; Karmakar MK; Aun Sui Tee Cindy and Lee Anna. “A Survey of the Cuff Pressure of Endotracheal Tube in Patients Undergoing General Anaesthesia”. HKCA Newsletter 2004;13(4):54. (Abstract)
  • Ho AM, Soo G, Lee S, Chung DC, Critchley LA, Karmakar MK. Images in Anesthesia: Airway obstruction after peanut aspiration – air trapping is due to airway distension and narrowing. Can J Anaesth. 2005 Feb;52(2):205-6.
  • Karmakar MK; Ho Ming Hei Anthony; LAW Bonita; Gin Tony and Chung David Chi Wai. “Prospective Randomized Evaluation of the Effects of Combining a Single-Injection Thoracic Paravertebral Block with General Anaesthesia in Patients Undergoing Modified Radical Mastectomy”. Anaesth Intensive Care. 2005; 33:134-135.(Abstract)
  • Ho AM, Joynt GM, Karmakar MK. Ultrasound for central venous cannulation: economic evaluation of cost effectiveness. Anaesthesia. 2005 Apr;60(4):407-11.
  • Ho AM-H, Jenkins CR, Karmakar MK. Safer central venous Anaesthesia. 2005; 60: 617 (Letter)
  • Hu B, Sun LC, Karmakar M, Cotton PB, Gostout CJ, Hawes RH, Kalloo AN, Kantsevoy SV, Pasricha PJ, Chung SC. Assessing the adequacy of endoscopically tied knots: a functional approach. Endoscopy. 2005 May;37(5):415-7.
  • Ho Ming Hei Anthony; Jenkins Caroline Ruth; Karmakar MK and Joynt Gavin Matthew. “Expected Utilities of Epidural  or  IV/IM  Opioid  Analgesia  for Labor”. Canadian Journal of Anesthesia 2005; 52 (S1): pp.A131. (Abstract)
  • Ho AM, Karmakar MK, Dion Are we giving enough coagulation factors during major trauma resuscitation? Am J Surg. 2005 Sept;190(3):479-84.
  • Jenkins CR, Karmakar MK. An unusual complication of interscalene brachial plexus catheter insertion: delayed catheter Br J Anaesth. 2005 Oct;95(4):535-7.
  • Karmakar MK, Ho AM-H, Law KB, Wong ASY, Shafer SL, Gin T. Arterial and Venous Pharmacokinetics of Ropivacaine with and without Epinephrine after Thoracic Paravertebral Block. Anesthesiology 2005 Oct;103(4):704-711.
  • Ho AM-H, Dion PW, Karmakar MK, Jenkins CR. Accuracy of central venous pressure during simultaneous continuous infusion through the same catheter. 2005,60: 1027-1030
  • Ho AM-H, Chen S, Karmakar MK. Central apnoea after balanced general anaesthesia that included Br J Anaesth. 2005 Oct; 95(6): 773-5.
  • Ho AM-H, Karmakar MK. Acute lung toxicity after total cystectomy. Acta Anaesthesiol Scand. 2005 Nov;49(10):1575. (Letter) 
  • Ho AM-H, Dion P, Cheng AYC, Karmakar MK, Cheng G, Peng Z, Ng YW. A mathematical model for fresh frozen plasma transfusion strategies during major trauma resuscitation with ongoing hemorrhage. Can J Surg. 2005 Dec; 48(6): 470- 78
  • Ho AM, Karmakar MK. Cuffed versus uncuffed pediatric endotracheal tubes. Can J Anaesth. 2006 Jan;53(1):106. (Letter)
  • Ho AM, Karmakar MK. Facilitating Endotracheal Tube Advancement during Fiberscope-assisted Intubation: Giving Due Credit. 2006 Feb;104(2):376. (Letter)
  • Ho AM, Chung DC, Karmakar MK, Gomersall CD, Peng Z, Tay BA. Dynamic airflow limitation after topical anaesthesia of the upper airway. Anaesth Intensive Care 2006; 34: 211-215.
  • Ho AM, Li P, Karmakar MK. Risk of hematoma after epidural anesthesia and analgesia for cardiac surgery. Anesth Analg. 2006 Nov;103(5):1327 (Letter)
  • Lee A, Fan LT, Gin T, Karmakar MK, Ngan Kee WD. A systematic review (meta- analysis) of the accuracy of the mallampati tests to predict the difficult airway. Anesth Analg. 2006 Jun;102(6):1867-78.
  • Ho AM, Karmakar MK. Radiation exposure in children. Anesth Analg. 2006 Dec; 103(6):1630 (Letter)
  • Ho AM-H, Lee A, Joynt GM, Karmakar MK. Decision Anaesthesia. 2007, 62(1):93 (Letter)
  • Ngan Kee WD, Khaw KS, Ng FF, Karmakar MK, Critchley LA, Gin T. A prospective comparison of vasopressor requirement and hemodynamic changes during spinal anesthesia for cesarean delivery in patients with multiple gestation versus singleton pregnancy. Anesth Analg. 2007 Feb;104(2):407-11
  • Karmakar MK, Kwok WH, Tsang HS Kristie, Ho AM-H, Chui PT, Gin T. Ultrasound Guided   Sciatic   Nerve   Block:   description   of    a    new    approach at the Subgluteal Space. Brit J Anaesth. 2007; 98(3): 390-395
  • Ho AM, Wong JC, Chui PT, Karmakar MK. Case report: Use of two balloon-tipped catheters during thoracoscopic repair of a type C tracheoesophageal fistula in a neonate. Can J Anaesth. 2007 Mar;54(3):223-6
  • Karmakar MK, Kwok WH, HO AMH, Tsang HS, Chui PT and GIN “Ultrasound- Guided Sciatic Nerve block: Description of a New Approach at the Subgluteal Space – Reply”. British Journal of Anaesthesia 2007; 99 (3): 445-446. (Reply to Letter)
  • Ho AM-H, Wan S, Karmakar MK. Flooding with Carbon Dioxide prevent airway fire induced by diathermy during open tracheostomy. J Trauma. 2007; 63: 228-231
  • Ho AM-H, Karmakar MK. A simple addition to the swivel and Arndt multiport adaptors to facilitate fiber-optic bronchoscopy in small children. Ann R Coll Surg Engl. 2007; 89: 532-533
  • Abbas S, Brull R, Karmakar MK, Kwok WH, Ho AM, Tsang K, Chui PT, Gin T. Ultrasound-guided sciatic nerve block: description of a new approach at the subgluteal space. Brit J Anaesth. 2007; Sep;99(3):445-6 (Letter)
  • Ho AM, Lee A, Karmakar MK, Samy W, Lai PB, Ho OA, Cho A. Hemostatic parameters after hepatectomy for cancer. 2007 Jul- Aug;54(77):1494-8.
  • Ho AM-H, Karmakar MK, Critchley LAH, Tay BA. Vascular Air Embolism: Lung Injury and Its Pathophysiology Also Need to Be Considered. Anesthesiology. 2007; 107:853 (Letter)
  • Karmakar MK. Ultrasound Guided Interventions in Paediatric Clinical Paediatric Anaesthesia. 2007 Nov, 13(1):53-4
  • Ngan Kee WD, Tam YH, Khaw KS;  Ng  F,  Critchley  LAH  and  Karmakar  MK. “Closed-loop Feedback Computer-controlled Infusion of Phenylephrine for Maintaining Blood Pressure During Spinal Anaesthesia for Caesarean Section: A Preliminary Descriptive”. Anaesthesia 2007;62 (12), 1251-1256.
  • Karmakar MK, Ho AM-H, Li Xiang, Kwok WH, Tsang HS, Ngan Kee WD. Ultrasound Guided Lumbar Plexus Block through the Acoustic Window of the Lumbar Ultrasound Trident. Brit J Anaesth 2008 Apr; 100(4): 533-7
  • Li, X, Karmakar MK, Lee A, HO AMH, Critchley LAH and Gin T. “Quantitative Evaluation of  the  Echogenicity  of  Peripheral   Nerve   in   Young   and  Elderly”. Supplement to Anesthesia & Analgesia. 2008: 106(3S):S-241.
  • Ho AM-H, Karmakar MK. Choosing the Correct Laryngeal Mask Airway Sizes and Cuff Inflation Volumes in Pediatric Patients. The J Emerg Med. 2008; 35(3): 299- 300 
  • Ho AM, Karmakar MK, Critchley LA, Ng SK, Wat CY. 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. Br J Anaesth. 2008 Nov;101(5):690-3
  • Ngan Kee WD, Lee A, Khaw KS, Ng FF, Karmakar MK, Gin T. A randomized double-blinded comparison of phenylephrine and ephedrine infusion combinations to maintain blood pressure during spinal anesthesia for cesarean delivery: the effects on fetal acid-base status and hemodynamic control. Anesth Analg. 2008 Oct;107(4):1295-302.
  • Ho AMH, Graham CA, Ng CSH, Yeung J, Dion PW, Critchley LAH, Karmakar MK. Timing of tracheal intubation in traumatic cardiac tamponade: a word of caution. Resuscitation. 2009(80): 272-274
  • Karmakar MK, Li X, Kwok WH, Ho AM-H, Ngan Kee The “Water-based Spine Phantom” – A Small Step towards Learning the Basics of Spinal Sonography. Br J Anaesth. 2009 (Letter-to-Editor) https://doi.org/10.1093/bja/el_4114
  • Karmakar MK, Li X, Ho AM-H, Kwok WH, Chui Real-time Ultrasound Guided Paramedian Epidural Access – Evaluation of a Novel In-plane Technique. Br J Anaesth. 2009 Jun;102(6):845-54
  • Ngan Kee WD, Khaw KS, Tan PE, Ng FF, Karmakar MK. Placental Transfer and Fetal Metabolic Effects of Phenylephrine and Ephedrine during Spinal Anesthesia for Cesarean Delivery. 2009; 111:506–12
  • Karmakar MK. Ultrasound Guided Regional Anaesthesia in Children. Clinical Paediatric Anaesthesia. 2009; 15(1):69
  • Karmakar MK. Ultrasound for Central Neuraxial blocks. Techniques in Regional Anesthesia and Pain Management. 2009 July; 13(3): 161-170
  • Karmakar MK. Ultrasound-guided Thoracic Paravertebral Block. Techniques in Regional Anesthesia and Pain Management. 2009 July; 13(3): 142-149
  • Ho AM, Ng SK, Tsang KH, Au SW, Ng CS, Critchley LA, Karmakar MK. A technique that may improve the reliability of endobronchial blocker positioning during adult one-lung anaesthesia. Anaesth Intensive Care. 2009 Nov;37(6):1012- 6.
  • Kwok WH, Chui PT, Karmakar MK. Pig Carcass Spine Phantom – A Model to Learn Ultrasound Guided Neuraxial Interventions. Reg Anesth Pain Med 2010, Sept-Oct; 35(5): 472-3.(Letter) (Corresponding Author)
  • Ho AM, Dion PW, Yeung JH, Ng CS, Karmakar MK, Critchley LA, Rainer TH, Cheung CW, Tay BA. Fresh-frozen plasma transfusion strategy in trauma with massive and ongoing Common (sense) and sensibility. Resuscitation. 2010 Jun 21; 81(9): 1079-1081
  • Chan SK, Lai PB, Li PT, Wong J, Karmakar MK, Lee KF, Gin T. The analgesic efficacy of continuous wound instillation with ropivacaine after open hepatic surgery. Anaesthesia 2010; 65: 1180-1186
  • Cheung N, Karmakar MK. Right Thoracic Paravertebral Block for Percutaneous Radiofrequency Ablation of Liver Tumors. British Journal of Radiology 2011 Sep;84(1005):785-9. [E-publication ahead of print: 2010 Nov 16]. (Corresponding Author)
  • Li JW, Karmakar MK, LI X, Kwok WH, Ngan Kee WD. The “Gelatin-agar Lumbosacral Spine Phantom” – a simple model for learning the basic skills required to perform real-time sonographically guided central neuraxial blocks. J Ultrasound Med. 2011 Feb;30(2):263-72. (Corresponding Author)
  • Ho AM, Karmakar MK, Critchley LA. Acute pain management of patients with multiple fractured ribs: a focus on regional techniques. Curr Opin Crit Care. 2011 Aug;17(4):323-7. (Review)
  • Chin KJ, Karmakar MK, Peng P. Ultrasonography of the adult thoracic and lumbar spine for central neuraxial blockade. Anesthesiology 2011; 114(6):1459-1485. (Review) 
  • Salah-Blanch X, Vandepitte C, Laur J, Horan P, Xu D, Reina M.A, Karmakar M.K, Clark T.B, Hadzic A. A practical review of perineural versus intraneural injections: a call for standard nomenclature. International Anesthesiology Clinics. 2011; 49(4):1-12. (Review) 
  • Meng Q, Chui YP, Qin J, Kwok WH, Karmakar M, Heng PA. CvhSlicer: an interactive cross-sectional anatomy navigation system based on high-resolution Chinese visible human data. Stud Health Technol Inform. 2011;163:354-8. (Original Research)
  • Ho AM-H, Ricci C.J, Ng CSH, Critchley LAH, Ho AK, Karmakar MK, Cheung CW, NG SK. The medial-transverse approach for internal jugular vein cannulation – an example of lateral thinking. J Emerg Med. 2012 Feb;42(2):174-7. (Original Research) 
  • Karmakar M, Li X, Li J, Sala-Blanch X, Hadzic A, Gin Three-dimensional/four- dimensional volumetric ultrasound imaging of the sciatic nerve. Reg Anesth Pain Med. 2012 Jan-Feb;37(1):60-6. (Original Research, Principal Investigator, Corresponding Author) 
  • Li J, Karmakar MK, Li X, Kwok WH, Kee WD. Regional hemodynamic changes after an axillary brachial plexus block: a pulsed-wave Doppler ultrasound Reg Anesth Pain Med. 2012 Jan-Feb;37(1):111-8. (Original Research, Principal Investigator, Corresponding Author) 
  • Stopar P.T, Veranic P, Hadzic A, Karmakar M, Cvetko E. Electron-microscopic imaging of endothoracic fascia in the thoracic paravertebral space in Reg Anesth Pain Med. 2012 Mar;37(2):215-8. (Original Research)
  • Ho AM, Dion PW, Yeung JH, Holcomb JB, Critchley LA, Ng CS, Karmakar MK, Cheung CW, Rainer TH. Prevalence of Survivor Bias in Observational Studies on Fresh Frozen Plasma: Erythrocyte Ratios in Trauma Requiring Massive Anesthesiology. 2012 Mar;116(3):716-728.
  • Li X, Karmakar MK, Lee A, Kwok WH, Critchley LAH, Gin T. Quantitative Evaluation of the Echo-intensity of the Median Nerve and Flexor Muscles of the Forearm in the Young and the Elderly. Br J Radiol. 2012, 85: e140-e145. [Epub ahead of print, Oct 18, 2011] (Original Research, Principal Investigator, Corresponding Author)
  • Karmakar MK, Li X, Kwok WH, Ho AM-H, Ngan Kee Sonoanatomy Relevant for Ultrasound-Guided Central Neuraxial Blocks via the Paramedian Approach in the Lumbar Region. British Journal of Radiology 2012, July. 85; e262-e269. [E- publication ahead of print: Oct 1,.2011] (Original Research, Principal Investigator, Corresponding Author) 
  • Kwok WH, Wong MK, Ho AM-H, Critchley LAH, Karmakar MK. Left mainstem bronchial tear manifesting as sudden increase in end-tidal CO2 during thoracoscopic tracheoesophageal fistula repair” Journal of Cardiothoracic and Vascular Anesthesia. 2012 Jul 12 [Epub ahead of print]
  • Karmakar MK, Li X, Li J, Hadzic A. Volumetric 3D Ultrasound Imaging of the Anatomy Relevant for Thoracic Paravertebral Block. Anesth Analg. 2012; 115(5): 1246-1250. (Original Research, Principal Investigator, Corresponding Author) 
  • Ho AM, Dion PW, Ng CS, Karmakar MK. Understanding immortal time bias in observational cohort Anaesthesia. 2013; Feb;68(2):126-30. [Epub 2012 Dec 13].
  • So E, Karmakar MK. Assessment of the spine with CT and MRI prior to interspinous/interlaminar spinal procedures: A pictorial The British Journal of Radiology 2013;86: 2013066. (Review)
  • Karmakar MK, Li JW, Kwok WH, Soh E, Hadzic A. Sonoanatomy Relevant for Lumbar Plexus Block in Volunteers Correlated with Cross-sectional Anatomic and MRI Images. Reg Anesth Pain Med.2013, 38: 447-451. (Original Research, Principal Investigator, Corresponding Author) 
  • Karmakar MK, Shariat AN, Pangthipampai P, Chen High Definition Ultrasound Imaging Defines the Paraneural Sheath and the Fascial Compartments Surrounding the Sciatic Nerve at the Popliteal Fossa. Reg Anesth Pain Med.2013,38:391-397 (Accompanied by an editorial Reg Anesth Pain Med.2013, 38:375-377). (Original Research, Principal Investigator, Corresponding Author) 
  • Or DLY, Karmakar MK, Lam GCS, Hui JWY, Li JW, Chen PP. Multi-planar 3D Ultrasound Imaging to Assess the Anatomy of the Upper Airway and Measure the Subglottic and Tracheal Diameters in Adults. The British Journal of Radiology. published ahead of print August 21, 2013, doi:10.1259/bjr.20130253 (Original Research, Principal Investigator, Corresponding Author)
  • Tighe SQM, Karmakar MK. Serratus plane block: do we need to learn another technique for thoracic wall blockade? (Editorial) 2013 Nov;68(11):1103-6. Epub 2013 Sep 14 (Editorial) 
  • Marhofer D, Karmakar MK, Marhofer P, Kettner SC, Weber M, Zeitlinger Does Circumferential Spread Of Local Anaesthetic Improve The Success Rate Of Peripheral Nerve Blockade? Br J Anaesth. 2014 Jul;113(1):177-85. doi: 10.1093/bja/aeu002. Epub 2014 Feb 25. (Original Research)
  • Karmakar MK, Shariat AN, Pangthipampai P, Chen Sonography of the paraneural sheath of the sciatic nerve in the popliteal fossa: more than a bifurcation. Reply to Drs. Wolf and Gray. Reg Anesth Pain Med. 2014 May-Jun;39(3):261-2.
  • Karmakar MK, Samy W, Li J.W, Lee A, Chan WC, Chen PP, Ho AMH. Thoracic Paravertebral Block and Its Effects on Chronic Pain and Health-related Quality of Life after Modified Radical Mastectomy. Reg Anesth Pain Med. 2014 Jul- Aug;39(4):289-298. (Original Research, Principal Investigator, Corresponding Author)
  • Karmakar MK, Li JW, Kwok WH, Hadzic A. Ultrasound-Guided Lumbar Plexus Block Using a Transverse Scan through the Lumbar Intertransverse Space: A Prospective Case Series. Reg Anesth Pain Med. 2015; Jan-Feb; 40(1): 75-81. (Original Research, Principal Investigator, Corresponding Author) 
  • Ho AM-H, Zamora JE, Holcomb JB, Ng CSH, Karmakar MK, Dion The Many Faces of Survivor Bias in Observational Studies on Trauma Resuscitation Requiring Massive Transfusion. Ann Emerg Med. 2015 Jan 8. pii: S0196-0644(14)01654- 0.
  • Li X, Karmakar MK, Li JW, Ho AM-H. Age-related Differences in Quantitative Echotexture of the Median Nerve. J Ultrasound Med. 2015 May;34(5):797-804 (Corresponding Author)
  • Karmakar MK, Sala-Blanch X, Songthamwant B, Tsui BCH. Benefits of the Costoclavicular Space for Ultrasound-guided Infraclavicular Brachial Plexus Block: Description of a “Costoclavicular” Approach. Reg Anesth Pain Med. 2015 May- Jun;40(3):287-8. (Letter-to-editor)
  • Sivashanmugam T, Ray S, Ravishankar M, Jaya V, Selvam E, Karmakar MK. Randomized Comparison of Extrafascial Versus Subfascial Injection of Local Anesthetic During Ultrasound-Guided Supraclavicular Brachial Plexus Block. Reg Anesth Pain Med. 2015 Jul-Aug;40(4):337-43. (Original Research) 
  • Ho AM, Holcomb JB, Ng CS, Zamora JE, Karmakar MK, Dion The traditional vs “1:1:1” approach debate on massive transfusion in trauma should not be treated as a dichotomy. Am J Emerg Med. 2015 Oct;33(10):1501-4

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