Transit-lime Ultrasound Flowmetry in CABG
Charles C Canver1, Jyotirmay Chanda
1Director, The Heart Institute, Sheridan-Alley Professor & Head, Division of Cardiothoracic Surgery, Albany Medical College, Albany, NY.
Surgical Technology International
|September 10, 2002
Summary
Intraoperative flow measurement in coronary bypass grafts aids functional evaluation and predicts patient outcomes by detecting technical errors early. This method offers a valuable alternative to traditional angiography for assessing anastomosis quality during surgery.
Area of Science:
- Cardiovascular Surgery
- Surgical Technology
- Medical Diagnostics
Background:
- Assessing coronary bypass graft (CABG) function intraoperatively is crucial for predicting patient outcomes.
- Early detection of technical errors in vascular anastomosis can prevent graft failure.
- Current methods for intraoperative graft assessment have limitations.
Purpose of the Study:
- To highlight the importance of intraoperative flow measurement for evaluating CABG.
- To discuss the predictive value of flow assessment on patient outcomes.
- To compare flow measurement with existing anastomosis assessment techniques.
Main Methods:
- Review of existing literature on intraoperative graft assessment techniques.
- Discussion of the principles and application of flow measurement in vascular surgery.
- Comparison of flow measurement with angiography and other methods.
Main Results:
- Intraoperative flow measurement provides functional evaluation of coronary bypass grafts.
- Flow assessment can predict both immediate and late patient outcomes after myocardial revascularization.
- Early identification of technical errors is facilitated by real-time flow data.
Conclusions:
- Intraoperative flow measurement is a valuable tool for assessing CABG quality.
- This technique offers advantages over traditional methods like angiography.
- Implementing flow measurement can improve surgical decision-making and patient prognosis.
Related Concept Videos
02:31Phase Transitions
23.3K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.3K
01:02Noncompartmental Analysis: Mean Transit, Absorption and Dissolution Time
393
When drugs are administered extravascularly, a comprehensive evaluation through noncompartmental analysis becomes imperative. This analytical approach considers various parameters that play a crucial role in understanding the pharmacokinetics of these drugs.
One of the key parameters is the mean transit time (MTT), which refers to the total duration required for drug molecules to transit through the body. MTT is determined by calculating the ratio of the area under the moment curve to the area...
One of the key parameters is the mean transit time (MTT), which refers to the total duration required for drug molecules to transit through the body. MTT is determined by calculating the ratio of the area under the moment curve to the area...
393
02:58Properties of Transition Metals
30.0K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.0K
01:58Cooperative Allosteric Transitions
8.9K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.9K
02:39Phase Transitions: Vaporization and Condensation
21.5K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
21.5K
02:33Phase Transitions: Sublimation and Deposition
20.3K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
20.3K