Tubular Locomotion and Positioning Using Tip Eversion for Endoscopy

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
Ankit Saxena ◽  
Eric M. Pauli ◽  
Randy S. Haluck ◽  
Barry Fell ◽  
Jason Moore
Keyword(s):  
Large Intestine ◽  
Fluid Pressure ◽  
Invasive Procedure ◽  
Intestinal Wall ◽  
Minimally Invasive Procedure ◽  
Procedure Time ◽  
Future Design ◽  
Tubular Element ◽  
Curved Paths ◽  
High Level

Abstract Colonoscopy is a minimally invasive procedure to examine the large intestine using a flexible endoscope. Currently, colonoscopic procedures require physically pushing the endoscope through the large intestine which potentially imparts damaging forces on the intestinal wall, requires a high level of expertise to perform safely, and can require extensive procedure time. This paper presents the use of inverted tubular element locomotion (ITEL) for improved endoscope translation and positioning that works via tip eversion of inverted plastic tubes. Experiments were performed to examine the fluid pressure required for locomotion through a large intestinal model and in both straight and curved paths and determine the optimal tube dimensions for insertion via ITEL. Experiments were then performed to compare intestinal forces during manual and ITEL-based insertion. The experiments established a relationship between the tip eversion pressure and the tube thickness and diameter. In addition, it was found that pressure required for locomotion was only minimally impeded by being enclosed in the intestinal manikin but significantly impacted by the curvature of the turn. Measured insertion forces for ITEL were found to be 10.1% less compared to traditional insertion. These results will aid in the future design and development of ITEL for endoscopic positioning.

scholarly journals Definite Ocular Sarcoidosis Using Endobronchial Ultrasonography with Transbronchial Needle Aspiration

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Sukhuma Warrasak ◽  
Sawang Saenghirunvattana ◽  
Ataya Euswas ◽  
Santa Methasiri ◽  
Surapon Worapongpaiboon ◽  
...  
Keyword(s):  
Invasive Procedure ◽  
Pulmonary Involvement ◽  
Needle Aspiration ◽  
Endobronchial Ultrasound ◽  
Alternative Procedure ◽  
Minimally Invasive Procedure ◽  
Ultrasound Guided ◽  
Transbronchial Needle Aspiration ◽  
Ocular Sarcoidosis ◽  
Endobronchial Ultrasonography

Purpose. To introduce a minimally invasive procedure, endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA), to obtain a pathologic evidence of a definite ocular sarcoidosis in a patient who initially presented with presumed ocular sarcoidosis with pulmonary involvement.Methods. An EBUS-TBNA procedure was performed at perihilar lymph nodes, subcarina, and right paratrachea of the patient and specimen obtained was sent for histocytopathological studies.Result. Histocytopathological findings revealed aggregates of epithelioid histiocytes forming a noncaseous granuloma, a hallmark of sarcoidosis.Conclusion. EBUS-TBNA should be considered an alternative procedure to provide cytohistopathology proven diagnosis of definite ocular sarcoidosis.

S34 TENSION-FREE VAGINAL TAPE: ONE OF THE MINIMALLY INVASIVE PROCEDURE IN SUI

2010 ◽  
Vol 9 (6) ◽  
pp. 567
Author(s):  
X. Quni ◽  
I. Haxhiu ◽  
H. Aliu ◽  
N. Baftiu ◽  
M. Toska ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Invasive Procedure ◽  
Minimally Invasive Procedure ◽  
Tension Free ◽  
Tension Free Vaginal Tape

scholarly journals Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015 ◽  
Vol 8 (7) ◽  
pp. 2167-2185 ◽  
Author(s):  
A. P. S. Selvadurai ◽  
A. P. Suvorov ◽  
P. A. Selvadurai
Keyword(s):  
Rock Mass ◽  
Fractured Rock ◽  
Fluid Pressure ◽  
Computational Modelling ◽  
Fracture Zones ◽  
Saturated Rock ◽  
Rock Formations ◽  
Geological Formation ◽  
High Level Nuclear Waste ◽  
High Level

Abstract. The paper examines the coupled thermo-hydro-mechanical (THM) processes that develop in a fractured rock region within a fluid-saturated rock mass due to loads imposed by an advancing glacier. This scenario needs to be examined in order to assess the suitability of potential sites for the location of deep geologic repositories for the storage of high-level nuclear waste. The THM processes are examined using a computational multiphysics approach that takes into account thermo-poroelasticity of the intact geological formation and the presence of a system of sessile but hydraulically interacting fractures (fracture zones). The modelling considers coupled thermo-hydro-mechanical effects in both the intact rock and the fracture zones due to contact normal stresses and fluid pressure at the base of the advancing glacier. Computational modelling provides an assessment of the role of fractures in modifying the pore pressure generation within the entire rock mass.

Developing a smartphone-based ecological momentary assessment protocol to collect biopsychosocial data with community-dwelling late-middle-aged and older adults

2018 ◽  
Vol 9 (4) ◽  
pp. 711-719 ◽  
Author(s):  
Huiying Liu ◽  
Vivian W Q Lou
Keyword(s):  
Ecological Momentary Assessment ◽  
Community Dwelling ◽  
Middle Aged ◽  
Assessment Protocol ◽  
Future Design ◽  
Design And Implementation ◽  
Older Chinese ◽  
High Level ◽  
Ecological Momentary ◽  
Momentary Assessment

Abstract Although ecological momentary assessment (EMA) has been used in youth and adult populations, very few of the studies provided evidence of the feasibility and utility of smartphone-based EMA protocols to collect biopsychosocial data from aging populations. This study aimed to describe the design and implementation of a smartphone-based EMA protocol, and to evaluate the feasibility and utility of this EMA protocol among community-dwelling late-middle-aged and older Chinese. A sample of 78 community-dwelling Chinese aged between 50 and 70 years was trained to participate in a 1-week EMA data collection, during which each participant carried an Android smartphone loaded with a researcher-developed EMA application and a smartphone-based electrocardiogram (ECG) monitor to provide psychosocial (e.g., daily activities, social interaction, affect) data and ECG recordings six times daily. Adherence was demonstrated with a total response rate of 91.5% of all scheduled assessments (n = 3,822) and a moderately high level of perceived feasibility. Female participants reported higher compliance to the study and rated the overall experience as more pleasant and interesting than male participants. Our study provided the first evidence of the feasibility and utility of smartphone-based EMA protocols among late-middle-aged and older Chinese. Key areas for improvement in future design and implementation of mobile-based EMA include the incorporation of usable technology, adequate and training, and timely assistance.

scholarly journals Common operation, uncommon complication. Bleeding from superior haemorrhoidal artery after minimally invasive procedure for hemorrhoids – a case report

2019 ◽  
Vol 39 (1) ◽  
pp. 70-73 ◽  
Author(s):  
Janavikula Sankaran Rajkumar ◽  
Aluru Jayakrishna Reddy ◽  
Ravikumar Radhakrishnan ◽  
Anirudh Rajkumar ◽  
Syed Akbar ◽  
...  
Keyword(s):  
Case Report ◽  
Minimally Invasive ◽  
Invasive Procedure ◽  
Minimally Invasive Procedure ◽  
Common Operation ◽  
Uncommon Complication

scholarly journals EMBOLIZATION OF RENAL ANGIOMYOLIPOMA: CASE SERIES

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
Ghania Masood ◽  
Iffat Rehman ◽  
Saquib Khawar ◽  
Khurram A Mufti ◽  
Imran K. Niazi
Keyword(s):  
Minimally Invasive ◽  
Key Words ◽  
Case Series ◽  
Invasive Procedure ◽  
Standard Of Care ◽  
Renal Angiomyolipoma ◽  
Minimally Invasive Procedure ◽  
Benign Lesions ◽  
Current Standard ◽  
Spontaneous Haemorrhage

Renal angiomyolipomas (AML) are benign lesions usually left alone. However, lesions larger than 4 cm carry the risk of spontaneous haemorrhage and need treatment. Angiography and embolisation are the current standard of care particularly in patients with high operative risks. Angio-embolisation is a safe, minimally invasive procedure preserving maximum renal parenchyma, with the added advantage of preventing peri-procedural morbidity. Two cases of AML are presented in this case series. Key words: Angiomyolipoma, embolisation, renal 

scholarly journals External fixator for the treatment of narrowed pelvic canal in a cat

2021 ◽  
Author(s):  
S Pinna ◽  
C Tassani ◽  
M Rossini ◽  
F Lanzi
Keyword(s):  
Case Report ◽  
Surgical Treatment ◽  
Clinical Examination ◽  
External Fixator ◽  
Invasive Procedure ◽  
Sacral Fracture ◽  
Minimally Invasive Procedure ◽  
Canal Stenosis ◽  
Applied Tension ◽  
History Of

The aim of this study was to report the outcome of the use of an external fixator to treat a pelvic canal stenosis in a 5-month-old female cat. The cat was referred with a history of 3 weeks of intermittent signs of constipation refractory to the medical management, occurring after surgical treatment for a bilateral sacroiliac luxation and sacral fracture. The clinical examination revealed instability of the pelvis and a radiograph showed a pelvic canal stenosis and megacolon. External fixator was the method of choice to be used in this case. The manually applied tension on an external fixator resulted in a widening of the pelvic canal. At 45 days after surgery, there were no signs of constipation, and the radiological examination showed progressive bone healing. At 18 months post-op, the cat had no abnormalities both on the clinical examination and on the radiography. In conclusion, the use of an external fixator led to the widening of the pelvic canal using a minimally invasive procedure. To the authors’ knowledge, this case report represents the first surgical description and clinical outcome of the widening of the pelvic canal in cats using an external skeletal fixator.

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