Preoperative Ultrasound
Preoperative Ultrasound - Related Videos
05:05
Ultrasound Cyclo Plasty in Eyes with Glaucoma
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Cited by 17 •
2018
Glaucoma is a chronic disease with progressive degeneration of optic nerve fibers resulting in decreased visual field. Elevated intraocular pressure is considered the most important and the only treatable risk factor. This manuscript describes a simple, surgeon-friendly, non-incisional technique, named Ultrasound Cyclo Plasty, for reducing intraocular pressure in glaucoma patients.
01:16
Preoperational Thought IV: Numbers
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2026
Piaget’s preoperational stage, from about ages 2 to 7, is characterized by rapid growth in symbolic thinking. Children increasingly use words, images, and objects to represent ideas, although their reasoning remains largely intuitive. During this period, number sense develops from memorized counting toward an understanding of quantity and basic arithmetic.Counting and CardinalityChildren younger than age 3 may recite number words without fully understanding their numerical meaning. During the...
01:19
Preoperational Thought I: The Symbolic Function
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2026
Jean Piaget’s preoperational stage of cognitive development spans approximately ages 2 to 7. During this period, children increasingly think symbolically but are not yet able to perform logical mental operations consistently. Symbols are words, pictures, numbers, or objects that stand for something else. For example, the word "dog" can represent an entire category of animals, even when no dog is physically present. This ability allows children to mentally represent people, objects, and events...
10:53
A Novel Application of Musculoskeletal Ultrasound Imaging
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Cited by 14 •
2013
We describe a new ultrasound-based vector tissue Doppler imaging technique to measure muscle contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities. This approach provides complementary measurements of dynamic muscle function and could lead to a better understanding of mechanisms underlying musculoskeletal disorders.
01:30
Conservation During the Preoperational Stage
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2026
Conservation is the understanding that quantity remains unchanged when appearance or arrangement changes, provided nothing is added or removed. Piaget used conservation tasks to examine children’s developing logical reasoning and their tendency to rely on perceptual appearance.Liquid Conservation TaskIn the classic liquid conservation task, a child is shown equal amounts of water in two identical short, wide glasses. The water from one glass is then poured into a taller, narrower glass. Many...
FAQs
Returning echoes are interpreted according to differences in tissue acoustic properties, which produce visible structural patterns. These patterns help clinicians examine the organization of organs, vessels, fluid collections, and soft tissues rather than relying only on surface appearance. Recognizing these differences supports identification of abnormal structures and improves understanding of anatomy before an operation.
Doppler techniques add information about blood flow to the structural findings seen on ultrasound. This capability allows clinicians to characterize vessels and their flow-related features while evaluating anatomy relevant to an operation. The added vascular information can support procedural planning, particularly when the location or condition of blood vessels may influence the intended surgical approach.
Real-time imaging allows clinicians to observe anatomy during the examination and relate findings directly to the structures being assessed. Because the method does not expose patients to ionizing radiation, it provides a noninvasive option for gathering preoperative information. Together, these features support repeated or focused assessment when planning an intervention.
The assessment focuses on the anatomy relevant to the planned procedure and may include organs, blood vessels, fluid collections, and soft tissues. A transducer is used to obtain images from the area of interest, while Doppler may be added when blood-flow characterization is needed. Findings are then considered in relation to the proposed intervention.
Findings can show the position of relevant structures, identify abnormalities, and reveal anatomic variation before surgery. Clinicians can use this information to determine a suitable surgical approach and localize the intended target more precisely. By connecting preoperative anatomy with procedural planning, the examination may improve the safety and precision of an intervention.
Abnormalities, fluid collections, vessel characteristics, and variations in anatomy can all affect how a procedure is planned. Ultrasound findings help clinicians assess these features before entering the operative setting and adjust the intended approach when needed. In medicine, this supports more informed decisions about target location, access, and procedural safety.