Publications by authors named "Ka-Man Fong"

Article Synopsis
  • Current severe COVID-19 treatments have side effects, and N-acetylcysteine (NAC) is being explored as a safer alternative, though research on its effectiveness in critical cases is limited.
  • A study analyzed data from patients over 18 in ICU with respiratory failure and found that those receiving high-dose NAC (10 g/day) had higher 28-day mortality and fewer ventilator-free days compared to those who did not.
  • After adjusting for variables, the matched analysis showed no significant impact of NAC on 28-day mortality rates or recovery metrics, suggesting it may not be an effective treatment for severe COVID-19 pneumonia.*
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Background: Necrotizing fasciitis (NF) is a rare but potentially life-threatening soft tissue infection. The objective of this study was to assess the association between timely surgery within 6 h and hospital mortality in patients with limb NF, and to describe the trends in patients with NF, time to surgery and standardized mortality ratio (SMR) over 11 years.

Methods: This was a multicenter, retrospective cohort study of all intensive care unit patients who had emergency surgery within 24 h of hospitalization for limb NF between April 1, 2008 and March 31, 2019 in Hong Kong.

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Background: Sepsis surveillance using electronic health record (EHR)-based data may provide more accurate epidemiologic estimates than administrative data, but experience with this approach to estimate population-level sepsis burden is lacking.

Methods: This was a retrospective cohort study including all adults admitted to publicly-funded hospitals in Hong Kong between 2009-2018. Sepsis was defined as clinical evidence of presumed infection (clinical cultures and treatment with antibiotics) and concurrent acute organ dysfunction (≥2 point increase in baseline SOFA score).

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Article Synopsis
  • A study compared hospital outcomes between critically ill patients with COVID-19 and those with influenza A, focusing on mortality rates and risk factors.
  • The research involved a retrospective analysis of adult patients in Hong Kong, matching 373 COVID-19 patients with 373 influenza A patients based on similar characteristics.
  • Findings showed that COVID-19 patients had a significantly higher hospital mortality rate (17.5%) compared to influenza A patients (7.5%), with factors such as age and coinfections impacting these outcomes.
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Background: Early randomized controlled trials have demonstrated the benefits of tight glucose control. Subsequent NICE-SUGAR study found that tight glucose control increased mortality. The optimal glucose target in diabetic and nondiabetic patients remains unclear.

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Background: Veno-arterial extracorporeal membrane oxygenation (V-A ECMO) provides temporary haemodynamic support in refractory cardiogenic shock. Recent retrospective studies on levosimendan on V-A ECMO weaning had conflicting results. This study aimed to determine the association between levosimendan on V-A ECMO weaning success in a tertiary centre in Hong Kong.

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Background: The use of veno-arterial extracorporeal membrane oxygenation (VA-ECMO) decannulation with different percutaneous closure devices has been increasing. At our center, ProGlide devices have been used since November 2018, and Manta devices became an alternative since March 2020. This study aimed to compare the success and complication rates and the clinical outcomes of ProGlide and Manta devices for VA-ECMO decannulation after arteriotomy wound closure.

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To assess the effect from individual component in combinations of steroid, ascorbic acid, and thiamine on outcomes in adults with sepsis and septic shock with component network meta-analysis (NMA). We searched PubMed, EMBASE, and the Cochrane Library Central Register of Controlled Trials from 1980 to March 2021 for randomized controlled trials (RCT) that studied the use of glucocorticoid, fludrocortisone, ascorbic acid, and thiamine in patients with sepsis and septic shock. Citations screening, study selection, data extraction, and risk of bias assessment were independently performed by two authors.

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Introduction: The intra-aortic balloon pump (IABP) and Impella are left ventricular unloading devices with peripheral venoarterial extracorporeal membrane oxygenation (VA-ECMO) in place and later serve as bridging therapy when VA-ECMO is terminated. We aimed to determine the potential differences in clinical outcomes and rate of complications between the two combinations of mechanical circulatory support.

Methods: This was a retrospective, single institutional cohort study conducted in the intensive care unit (ICU) of Queen Elizabeth Hospital, Hong Kong.

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Background: When veno-arterial extracorporeal membrane oxygenation (VA-ECMO) support can be terminated, open repair of arteriotomy wounds in operating theaters is the standard of practice. Comparable outcomes by percutaneous decannulation using different closure devices have been reported. However, transport of the critically- ill, man-power and timeslots of operating theaters could be saved if decannulation was performed at bedside.

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Purpose: Use of anticoagulation in patients on ECMO, especially in Chinese, has always been difficult. This study aimed to review the incidence of bleeding, thrombosis, and transfusion requirement in Chinese ECMO patients and to identify risk factors for bleeding complications.

Materials And Methods: This was a retrospective observational study of a tertiary hospital from 2010 to 2018.

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Background: Intravenous fluid is important for resuscitation and maintenance of circuit flow in patients with extracorporeal membrane oxygenation, but fluid overload is widely recognized as detrimental in critically ill patients. This study aimed to evaluate the association between positive fluid balance and outcomes in adult patients treated with extracorporeal membrane oxygenation.

Methods: This was a retrospective observational study of a tertiary hospital from October 2010 to January 2018.

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A case report of successful application of peripheral veno-arterial extracorporeal membrane oxygenation in a patient with chronic type B aortic dissection and myocardial stunning to bridge to recovery was presented. Good outcomes from the application of peripheral veno-arterial extracorporeal membrane oxygenation in aortic dissection have rarely been reported, and the considerations of starting veno-arterial extracorporeal membrane oxygenation in this situation were seldom discussed. The orthodox that peripheral veno-arterial extracorporeal membrane oxygenation is an absolute contraindication for initiation of peripheral veno-arterial extracorporeal membrane oxygenation should be challenged.

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Termination of peripheral veno-arterial extracorporeal membrane oxygenation support by managing the arteriotomy wound using a percutaneous closure device was reported successful and effective. However, careful assessment by clinical examination and also ultrasound Doppler assessment of the lower limb vasculature after closure is of paramount importance. Complications including pseudoaneurysm, arterial stenosis, and acute thrombosis are not uncommon.

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Percutaneous closure of arteriotomy wound during peripheral venoarterial extracorporeal membrane oxygenation decannulation was shown to be safe and allow earlier mobilization. The new Manta vascular closure device (Essential Medical), designed for the closure of arterotomy wound created by large-bore vascular sheaths up to 25Fr during endovascular catheterization procedures, was reported to be applicable in venoarterial extracorporeal membrane oxygenation decannulation. In this article, we would like to share our experience of using real-time ultrasound guidance to ensure the safe application of Manta during bedside venoarterial extracorporeal membrane oxygenation decannulation.

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Veno-arterial extracorporeal membrane oxygenation is a form of mechanical circulatory support for patients with refractory decompensated heart failure. Blood is drawn from a large vein and pumped back to a large artery, usually a femoral artery through large bore catheters. When the heart recovers, the extracorporeal membrane oxygenation support can be terminated and the catheters are decannulated.

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Background: Patients with acute hypoxemic respiratory failure are at risk for life-threatening complications during endotracheal intubation. Preoxygenation might help reduce the risk of hypoxemia and intubation-related complications. This network meta-analysis summarizes the efficacy and safety of preoxygenation methods in adult patients with acute hypoxemic respiratory failure.

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