Basic Physics Revisited for a Surgeon

Rajkumar, J. S.; Chopra, Pradeep; Chintamani,

doi:10.1007/s12262-015-1308-6

Cited by 12 publications

(9 citation statements)

References 5 publications

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“…From a biomechanical viewpoint, the abdominopelvic cavity is a cylinder enveloped by muscles, tendons, and bony structures. According to Pascal's principle [ 31 ], any pressure generated within the abdominopelvic cavity is transmitted equally to the walls of that cavity. In response to increased abdominal pressure, the muscular abdominal wall contracts to generate counter-pressure.…”

Section: Discussionmentioning

confidence: 99%

Muscle elasticity is different in individuals with diastasis recti abdominis than healthy volunteers

Zhou

Zhu

et al. 2021

Insights Imaging

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Objective To determine the value of shear wave elastography (SWE) in assessing abdominal wall muscles, including rectus abdominis (RA), external oblique muscle (EO), internal oblique muscle, and transversus abdominis (TrA) in patients with diastasis recti abdominis (DRA) and healthy controls. Methods From October 2018 to December 2019, 36 postpartum DRA patients and 24 nulliparous healthy women were identified. Inter-rectus distance (IRD) measurements were taken by B-mode ultrasound. Shear wave speed (SWS) values were acquired by one operator at ten specific locations. Clinical and ultrasound variables, including demographics, IRD, muscle thickness, and muscle SWS, were compared between the two groups using Student’s t test or Fisher's exact test. Pearson correlation analyses were conducted for the variables of IRD, muscle thickness, and SWS in the 36 DRA patients. Results The maximum diameter of recti abdominus separation was located at the umbilicus in DRA patients (4.59 ± 1.14 cm). The SWS value was significantly lower in the RA (p = 0.003) and higher in the TrA muscle (p < 0.001) in DRA patients compared with the age-matched controls. However, SWS in both muscles (RA and TrA) showed a statistically positive correlation with IRD (p < 0.05). In addition, the SWS value in EO statistically decreased in DRA patients compared with the healthy controls (1.65 ± 0.15 vs. 1.79 ± 0.14, p = 0.001). Conclusions The application of SWE to abdominal wall muscles in DRA patients is feasible. The correlation between SWS value and IRD in RA should be interpreted with caution.

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Section: Discussionmentioning

confidence: 99%

Muscle elasticity is different in individuals with diastasis recti abdominis than healthy volunteers

Zhou

Zhu

et al. 2021

Insights Imaging

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“…1. Enterocutaneous fistula [2] Generally, Fistulas do not close if there is an obstruction distally. Fluid tends to find the easiest pathway, and relieving the distal obstruction according to Bernoulli's principle will increase the forward flow, causing a negative pressure at the junction of the fistulous tract and thus promotes its closure.…”

Section: Principles and Its Application In Surgical Field Bernoulli'smentioning

confidence: 99%

“…Here, radiofrequency alternating current is used to raise the temperature of cells to cause desiccation and coagulation of proteins, with a net result of either cutting or coagulation (used for hemostasis of tissues) [2]. The inappropriate placement of diathermy pad may cause a diathermy burn.…”

Section: = I X Rmentioning

confidence: 99%

Fundamentals of Physics in Surgery- Review

Agarwal¹,

Vasuniya²

2020

IJMBS

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Physics is everywhere in our daily life. It helps in understanding concepts of surgery easily. Application of physics in surgical field is very helpful especially for a surgeon. In this article we have summarized some common laws of physics, many of them we see in our operation theatre like Poiseuille’s Law, Pascal’s Law, Laplace’s Law, Bernoulli Equation or Theorem, Ohm’s Law, Floating Ball Valve Mechanism, Newton’s Law of Cooling, Laws of Vector and Air-Water Seal System. The application and understanding of these laws would make a surgeon think more like a scientist. Doppler Effect is used in ultrasonography to evaluate the direction and velocity of blood flow. Reynolds number (NR) is used to predict whether the flow of blood will be laminar or turbulent. The laws of Thermodynamics, Mechanics, and Vectors as they apply to soft and bony tissues. These include the Laplace’s Law as applied to colonic perforation and esophageal varices etc. In Electrocautery, alternating current is passed through a resistant metallic wire electrode and generates heat. The heated electrode is used to achieve hemostasis and dissection. The Pascal’s Law finds use in hernia repair Keywords: Physics, Surgery, Fundamentals.

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“…The editorial BBasic physics revisited for a surgeon^was aptly introduced with-BIf you can't explain it simply, you don't understand it well enough^-Albert Einstein [1].…”

Section: Sirmentioning

confidence: 99%

A Chase of Whys and Hows Kills the Beauty of What Is!

Chhabra

2018

Indian J Surg

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Basic Physics Revisited for a Surgeon

Cited by 12 publications

References 5 publications

Muscle elasticity is different in individuals with diastasis recti abdominis than healthy volunteers

Muscle elasticity is different in individuals with diastasis recti abdominis than healthy volunteers

Fundamentals of Physics in Surgery- Review

A Chase of Whys and Hows Kills the Beauty of What Is!

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