Publications by authors named "Khaled Yassen"

Objective: The primary aim of this study was to investigate the guidance effect of the bispectral index (BIS) on the target plasma concentration (TPC) of propofol required for deep sedation during endoscopic retrograde cholangiopancreatography (ERCP). Second, to identify propofol consumption, recovery time, and adverse events.

Methods: A total of 42 consecutive patients with liver cirrhosis and 43 consecutive patients with healthy livers were enrolled.

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Liver transplantation is a complex surgical procedure in which various forms of coagulation dysfunction can occur, including perioperative hypercoagulability. The hemostasis balance in liver graft recipients with end-stage liver disease can shift to thrombosis or haemorrhage, depending on the associated risk factors and clinical conditions. Hypercoagulability can result in serious complications such as thromboembolism, which can affect the vessels of the newly transplanted liver graft.

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Objectives: Splenectomy during liver transplant can affect platelet function. In this study, our primary aim was to assess the perioperative platelet function by rotational thromboelastometry and the effects of splenectomy on platelet function.

Materials And Methods: We studied 40 consecutive liver transplant recipients with end-stage liver disease (50% as a result of hepatitis C).

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Patients with sickle cell disease (SCD) require repeated blood sampling for hemoglobin (Hb) concentration measurements. The primary aim of this study was to compare non-invasive spectrophotometric hemoglobin (SpHb, g/dL) measurements to those taken via an automated hematology analyzer (Hb, g/dL) in patients with SCD visiting outpatient clinics and to investigate the correlations and agreements between both measurement techniques. Secondarily, we aimed to identify the SpHb cut-off concentration for the diagnosis of anemia and to monitor the effects of the pleth variability index (PVI, %) and perfusion index (PI) on SpHb measurements.

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Preoperative assessment of hemoglobin concentration in blood is important to diagnose anemia. The primary aim of this prospective diagnostic test accuracy study was to monitor non-invasive spectrophotometric hemoglobin (SpHb, g/dL) concentrations among adults prior to elective surgery and to investigate the correlation and agreement of SpHb with laboratory hemoglobin (Hb, g/dl). A secondary aim was to identify the anemia cut-off values for SpHb based on the World Health Organization (WHO) definitions for anemia.

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Background And Aims: Heparin-like effects (HLEs) can affect hemostasis during liver transplantation. The aim of this study was to assess the perioperative incidence and severity of HLE with rotational thromboelastometry (ROTEM) and activated partial thromboplastin time (aPTT).

Material And Methods: ROTEM and aPTT were measured intraoperatively and on postoperative days (POD) 1, 3, and 7.

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Background And Aims: Extensive surgical retraction combined with general anesthesia increase alveolar collapse. The primary aim of our study was to investigate the effect of alveolar recruitment maneuver (ARM) on arterial oxygenation tension (PaO). The secondary aim was to observe its effect on hemodynamics parameters in hepatic patients during liver resection, to investigate its impact on blood loss, postoperative pulmonary complications (PPC), remnant liver function tests, and on the outcome.

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Background And Aims: Cirrhotic patients are prone to hypotension during anesthesia. The primary aim of the study was to compare the effects of automated gas control (AGC) of sevoflurane and target-controlled infusion (TCI) of propofol on systemic and cardiac hemodynamics in hepatitis C cirrhotic patients undergoing surgery. The secondary aim was to compare the recovery, complications, and costs between the two groups.

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Background And Aims: Transjugular intrahepatic portosystemic shunt (TIPS) allows a high blood volume into systemic circulation abruptly. The primary aim of the study was to investigate the effect of TIPS on systemic, portal hemodynamics, and electric cardiometry (EC) parameters in sedated and spontaneous breathing patients. Secondary aims??

Material And Methods: Adult consecutive hepatic patients scheduled for elective TIPS were included.

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Article Synopsis
  • * Studies show that it might help patients recover faster, use fewer strong medications, and could help the heart and lungs.
  • * However, there are risks like air pollution and a rare condition called malignant hyperthermia, so careful monitoring is needed, and more research is still important.
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Objectives: During donor hepatectomy, we investigated (1) the Electrical Cardiometry associations and agreements between noninvasive plethysmography variability index and noninvasive stroke volume variation, (2) their association with central venous pressure, and (3) their ability to monitor intraoperative changes and discriminate donors with increased blood loss.

Materials And Methods: A diagnostic test accuracy was applied among donors (American Society of Anesthesiologists classification I). Data were recorded at 10 minutes after anesthesia induction, hourly during dissection, after resection, and at end of surgery.

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Objectives: Prolonged surgical retraction may cause atelectasis. We aimed to recruit collapsed alveoli, stepwise, monitored by lung dynamic compliance and observe effects on arterial oxygenation and systemic and graft hemodynamics. Secondarily, we observed alveolar recruitment effects on postoperative mechanical ventilation, international normalized ratio, and pulmonary complications.

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The coronavirus disease 2019 (COVID-19) pandemic is currently recognized as a global health crisis. This viral infection is frequently associated with hypercoagulability, with a high incidence of thromboembolic complications that can be fatal. In many situations, the standard coagulation tests (SCT) fail to detect this state of hypercoagulability in patients with COVID-19 since clotting times are either not or only mildly affected.

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Background And Aims: Optimal pain control can be a challenge in cirrhotic patients. The aim was to compare the analgesic efficacy and side effects of intravenous fentanyl patient-controlled analgesia (PCA) with and without bupivacaine boluses in transversus abdominis plane (TAP) and rectus sheath space (RSB) in cirrhotics undergoing liver surgery.

Material And Methods: A double-blinded randomized controlled trial ( = 55, child's A) was conducted.

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Background: Hypercoagulability can lead to serious thromboembolic events. The aim of this study was to assess the perioperative coagulation status in liver transplant recipients with a tendency to hypercoagulability.

Methods: In a prospective observational study (South African Cochrane Registry 201405000814129), 151 potential liver transplant recipients were screened for thrombophilic factors from October 2014 to June 2017, and 57 potential recipients fulfilled the inclusion criterion of presenting two or more of the following thrombophilic factors: low protein C, low protein S, low anti-thrombin, increased homocystein, increased antiphospholipid IgG/IgM antibodies, increased lupus anticoagulant, and positive Factor V Leiden mutation.

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Background And Aims: Liver resection can lead to hepatocellular dysfunction. The aim was to evaluate the effect of N-acetyl cysteine (NAC) on liver enzymes (alanine aminotransferase [ALT] and aspartate aminotransferase [AST]), international normalized ratio (INR), C-reactive protein (CRP), and intercellular adhesion molecule 1 (ICAM 1) in cirrhotic patients undergoing liver resection.

Material And Methods: A randomized controlled trial (RCT), Pan African Clinical Trial registry (PACTR201508001251260).

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Background: This randomized controlled study compared the recovery times of sugammadex and neostigmine as antagonists of moderate rocuronium-induced neuromuscular block in patients with liver cirrhosis and controls undergoing liver resection.

Methods: The study enrolled 27 adult patients with Child class "A" liver cirrhosis and 28 patients with normal liver functions. Normal patients and patients with liver cirrhosis were randomized according to the type of antagonist (sugammadex 2 mg/kg or neostigmine 50 µg/kg).

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Background And Aim: Acute kidney injury (AKI) with liver transplantation (LT) is not uncommon. Impact of terlipressin infusion on AKI, hemodynamics, and plasma concentration of neutrophil gelatinase-associated lipocalin (NGAL) was studied.

Methods: Patients (n=50) were randomized (NCT02059460, USA) into two equal groups: terlipressin vs Controls.

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Objective: To compare the effects of low central venous pressure (LCVP) and transesophageal Doppler (TED)-guided fluid management on blood loss and blood transfusion during liver transplantation (LTx).

Design: Retrospective study.

Setting: Single institution, university hospital.

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Background: The ability to predict transfusion requirements may improve perioperative bleeding management as an integral part of a patient blood management program. Therefore, the aim of our study was to evaluate preoperative thromboelastometry as a predictor of transfusion requirements for adult living donor liver transplant recipients.

Methods: The correlation between preoperative thromboelastometry variables in 100 adult living donor liver transplant recipients and intraoperative blood transfusion requirements was examined by univariate and multivariate linear regression analysis.

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Background And Aims: Liver disease is usually accompanied with a decline in systemic vascular resistance (SVR). We decided to assess effects of the peri-operative terlipressin infusion on liver donor liver transplantation recipients with respect to haemodynamics and renal parameters.

Methods: After Ethical Committee approval for this prospective randomised controlled study, 50 recipients were enrolled and allotted to control (n = 25) or terlipressin group (n = 25) with simple randomisation method.

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Background: Postoperative pain is one of the most important problems that confront surgical patients. The aim of this work is to compare pain control using intravenous patient controlled analgesia (PCA) and patient controlled epidural analgesia (PCEA) in cirrhotic patients undergoing elective hepatic resection.

Methods: Thirty four adult patients ASAI and II scheduled for liver resection were randomly allocated into two groups-Group (P) with I.

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Background: Coagulation changes can complicate liver resection, particularly in patients with cirrhosis. The aim of this prospective hospital-based comparative study was to compare the postoperative analgesic efficacy of intravenous fentanyl patient-controlled analgesia (IVPCA) with and without transversus abdominis plane (TAP) block.

Methods: Fifty patients with Child's A cirrhosis undergoing liver resection were randomly divided into two groups for postoperative analgesia, ie, an IVPCA group receiving a 10 μg/mL fentanyl bolus of 15 μg with a 10-minute lockout and a maximum hourly dose of 90 μg, and an IVPCA + TAP group that additionally received TAP block (15 mL of 0.

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Background: The three phases of living donor liver transplantation (LDLT) represent different liver conditions. The aim is to study the required end-tidal desflurane concentration (ET-Des) guided with entropy monitoring for the depth of anesthesia.

Methods: After the Ethics and Research Committee approval, 40 patients were included in this prospective study.

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Purpose: Major hepatic resections may result in hemodynamic changes. Aim is to study transesophageal Doppler (TED) monitoring and fluid management in comparison to central venous pressure (CVP) monitoring. A follow-up comparative hospital based study.

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