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Related Concept Videos

Operons02:09

Operons

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Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related protein-coding genes. Operons use a single promoter sequence to initiate transcription of a gene cluster (i.e., a group of structural genes) into a single mRNA molecule. The terminator sequence ends transcription. An operator sequence, located between the promoter and structural genes, prohibits the operon’s transcriptional activity if bound by...
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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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SBAR is an effective communication tool used by healthcare professionals to communicate patient information accurately. SBAR stands for Situation, Background, Assessment, and Recommendation. For a better understanding, an example is given below.
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Osmosis is the movement of free water molecules through a semipermeable membrane.  The water's concentration gradient across the membrane is inversely proportional to the solutes' concentration. Whereas diffusion transports material across membranes and within cells, osmosis transports only water across a membrane, and the membrane limits the diffusion of solutes in the water. Osmosis is a special case of diffusion.
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Approximately 60% to 95% of the weight of living organisms is attributed to water. Therefore, maintaining appropriate water balance within cells is of paramount importance. Osmosis is the movement of water across a semipermeable membrane, such as a cell’s plasma membrane. In living organisms, water plays a crucial role as a solvent—a molecule that dissolves other molecules.
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Related Experiment Video

Updated: Apr 29, 2026

Use of the Operant Orofacial Pain Assessment Device OPAD to Measure Changes in Nociceptive Behavior
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Use of the Operant Orofacial Pain Assessment Device OPAD to Measure Changes in Nociceptive Behavior

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[OPCAB].

Keiko Nakazato, Atsuhiro Sakamoto

    Masui. the Japanese Journal of Anesthesiology
    |May 29, 2014
    PubMed
    Summary

    Off-pump coronary artery bypass grafting (OPCAB) offers reduced complications compared to on-pump surgery. Fast-track anesthesia strategies can enhance recovery, but require careful patient selection and perioperative planning.

    Area of Science:

    • Cardiovascular Surgery
    • Anesthesiology
    • Perioperative Medicine

    Context:

    • Off-pump coronary artery bypass grafting (OPCAB) aims to minimize complications associated with cardiopulmonary bypass.
    • Systematic inflammatory response, myocardial, renal, and cerebral injuries are potential concerns in on-pump procedures.

    Purpose:

    • To highlight the advantages of OPCAB in reducing postoperative complications.
    • To emphasize the importance of anesthetic management in OPCAB, focusing on myocardial oxygen consumption and hemodynamic stability.
    • To explore the role of fast-track anesthesia in facilitating rapid recovery after OPCAB.

    Summary:

    • OPCAB demonstrates benefits over on-pump coronary artery bypass grafting by reducing postoperative complications.
    • Anesthetic strategies for OPCAB should prioritize minimizing myocardial oxygen demand and managing hemodynamic instability during anastomosis.

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  • Fast-track anesthesia protocols can accelerate patient recovery, leading to earlier ambulation, discharge, and rehabilitation.

    • Impact:

    • Optimized perioperative anesthetic strategies can improve patient outcomes following OPCAB.
    • The adoption of fast-track anesthesia, including potential for intraoperative extubation in select patients, can enhance the efficiency of cardiac surgical care.
    • Further research into fast-track anesthesia for OPCAB may refine patient selection criteria and expand its applicability.