The SMART Trocar: Force, Deviation, and Impedance Sensing Trocar for Enhanced Laparoscopic Surgery

2019 ◽  
Author(s):  
Jonathan Schrope ◽  
Bjorn Olmanson ◽  
Caleb Fick ◽  
Cameron Motameni ◽  
Tayvin Viratyosin ◽  
...  
Keyword(s):  
Laparoscopic Surgery ◽  
Abdominal Wall ◽  
Surgical Simulation ◽  
Impedance Measurement ◽  
Organ Damage ◽  
Applied Force ◽  
Impedance Sensing ◽  
Training Tool ◽  
Trocar Placement ◽  
Electrical Impedance Measurement

Intra-abdominal organ and vascular injuries during laparoscopic trocar placement remain a significant cause for surgical complications during laparoscopic procedures. These complications can arise if the surgeon deviates from the proper placement axis, requiring additional applied force to obliquely traverse the abdominal wall. This increase in force application increases the risk of internal vessel and organ damage immediately after entrance to the peritoneal cavity. To mitigate this risk, our group designed a trocar that provides real-time feedback of deviation from the proper insertion axis, applied force, and position of the trocar tip within the tissue. This was performed using an accelerometer, load cell, and electrical impedance measurement. Our device was tested in a surgical simulation laboratory by medical students using a porcine abdominal wall model. Results establish our device as an effective training tool for educating surgeons on trocar placement in laparoscopic surgery.

scholarly journals Current status of residency training in laparoscopic surgery in Brazil: a critical review

2015 ◽  
Vol 28 (1) ◽  
pp. 81-85 ◽  
Author(s):  
Miguel Prestes NÁCUL ◽  
Leandro Totti CAVAZZOLA ◽  
Marco Cezário de MELO
Keyword(s):  
Laparoscopic Surgery ◽  
Endoscopic Surgery ◽  
Surgical Simulation ◽  
Internship And Residency ◽  
Current Status ◽  
Professional Activity ◽  
Medical Residency ◽  
Psychomotor Skills ◽  
Residency Programs ◽  
Education Medical

INTRODUCTION: The surgeon's formation process has changed in recent decades. The increase in medical schools, new specialties and modern technologies induce an overhaul of medical education. Medical residency in surgery has established itself as a key step in the formation of the surgeon, and represents the ideal and natural way for teaching laparoscopy. However, the introduction of laparoscopic surgery in the medical residency programs in surgical specialties is insufficient, creating the need for additional training after its termination. OBJECTIVE: To review the surgical teaching ways used in services that published their results. METHODS: Survey of relevant publications in books, internet and databases in PubMed, Lilacs and Scielo through july 2014 using the headings: laparoscopy; simulation; education, medical; learning; internship and residency. RESULTS: The training method for medical residency in surgery focused on surgical procedures in patients under supervision, has proven successful in the era of open surgery. However, conceptually turns as a process of experimentation in humans. Psychomotor learning must not be developed directly to the patient. Training in laparoscopic surgery requires the acquisition of psychomotor skills through training conducted initially with surgical simulation. Platforms based teaching problem solving as the Fundamentals of Laparoscopic Surgery, developed by the American Society of Gastrointestinal Endoscopic Surgery and the Laparoscopic Surgical Skills proposed by the European Society of Endoscopic Surgery has been widely used both for education and for the accreditation of surgeons worldwide. CONCLUSION: The establishment of a more appropriate pedagogical process for teaching laparoscopic surgery in the medical residency programs is mandatory in order to give a solid surgical education and to determine a structured and safe professional activity.

scholarly journals Practical Precision Electrical Impedance Measurement for the 21st Century – EMPIR Project 17RPT04 VersICal

2019 ◽  
Author(s):  
Oliver Power ◽  
Adam Ziolek ◽  
Andreas Elmholdt Christensen ◽  
Andrei Pokatilov ◽  
Anca Nestor ◽  
...  
Keyword(s):  
21St Century ◽  
Electrical Impedance ◽  
Impedance Measurement ◽  
Research Project ◽  
The Core ◽  
First Results ◽  
Electrical Impedance Measurement ◽  
Measurement Infrastructure

The core objective of EMPIR project 17RPT04 VersICaL is to improve the European measurement infrastructure for electrical impedance, with particular emphasis on the capabilities of developing NMIs and calibration centres. The project will seek to exploit the results of existing research on digital impedance bridges (DIBs) by designing, constructing and validating simple, affordable versions suitable to realise the impedance scale in the range 1 nF to 10 μF and 1 mH to 10 H with relative uncertainties in the range 10-5 to 10-6. The first results of the research project, including the bridge designs and details of a polyphase digitally synthesized multichannel source capable of providing voltage outputs of precise ratio and phase are presented.

scholarly journals A Case of Traumatic Abdominal Wall Hernia Repaired by Laparoscopic Surgery

2019 ◽  
Vol 80 (10) ◽  
pp. 1882-1887
Author(s):  
Hirohiko SATO ◽  
Daichi ISHIKAWA ◽  
Tsuyoshi TOYOTA ◽  
Kazuhito TAKAMURA ◽  
Murato MIURA
Keyword(s):  
Laparoscopic Surgery ◽  
Abdominal Wall ◽  
Abdominal Wall Hernia ◽  
Traumatic Abdominal Wall Hernia

Electrical Impedance Measurements of PZT Nanofiber Sensors

2016 ◽  
Author(s):  
Richard Galos ◽  
Xin Li
Keyword(s):  
Dielectric Constant ◽  
Material Properties ◽  
Electrical Impedance ◽  
Impedance Measurement ◽  
Low Frequencies ◽  
Impedance Measurements ◽  
Conductive Afm ◽  
Electrical Impedance Measurement ◽  
Microfabrication Techniques

Electrical Impedance Measurement of PZT Nanofiber sensors are performed and material properties including resistivity and dielectric constant are derived from the measurements. Nanofibers formed by electro-spinning with diameters ranging from 10 to 150 nm were collected and integrated into sensors using microfabrication techniques. The nanosensor impedance was extremely high at low frequencies and special matching circuitry was fabricated to detect output. The resulting impedance measurements are also compared with those of individual nanofibers that were tested using Scanning Conductive Microscopy (SCM) and Conductive AFM.

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