scholarly journals POTENTIALS OF MINI-INVASIVE ENDORHINOSURGERY TAKING INTO ACCOUNT THE ACTUAL BOUNDARIES OF THE FIELD OF VIEW OF MODERN ENDOSCOPES

2020 ◽  
Vol 20 (4) ◽  
pp. 232-236
Author(s):  
Ya.V. Shkorbotun
Keyword(s):  
Minimally Invasive ◽  
Maxillary Sinus ◽  
Optical Axis ◽  
Field Of View ◽  
Optical Characteristics ◽  
Viewing Angle ◽  
Axis Orientation ◽  
Surgical Access ◽  
Minimally Invasive Access ◽  
The Individual

One of the predetermining factors to perform minimally invasive rhinosurgery successfully is the searching for optimal surgical access areas, the choice of which at present mostly depends on the visualization capabilities of endoscopic devices. The angular vision is one of the important factors for planning and performing endonasal interventions on the anterior maxillary sinus. A large viewing angle allows surgeons to expand the potentials of minimally invasive access, reduce the need to replace endoscopes with different angles during the intervention and improve the quality of the surgical procedure. The purpose of this study was to improve the method for selecting surgical access to the maxillary sinus, taking into the optical axis and the actual size of the field of view provided by the endoscope. The simulation of the process of selecting the optimal option for access to the maxillary sinus on the basis of our own method of predicting the visualization of the lumen in the sinus was performed. To determine the actual viewing angle of the endoscope, we compared the application of the standard methodology and the approach we elaborated. 3 endoscopes with a 70° optical axis orientation were examined; the studies were performed three times. We found that the results of determining the boundaries of the field of view according to our technique and to the method of Wang Q. et al. (2017) did not differ significantly, that indicates the comparable accuracy of both methods. With the declared identical characteristics of all three endoscopes, we revealed the magnitude of the field of view differed quite significantly (by a maximum of 8.7°). Moreover, the value of the viewing angle in all samples of endoscopes tested was greater than that provided by the manufacturer for standard endoscopes (60 °). The average duration of measuring the magnitude of the field of view of the endoscope by the method we proposed took 25.3 ± 3.2 s that was significantly faster than by the method of Wang Q. et al. (2017), 83.7 ± 2.0 s P≤0.05). We should also stress on the greater convenience of carrying out examinations according to our method. When assessing the potential of the maxillary sinus visualization, it is necessary to take into account not only the individual anatomical features of a patient, but also the actual optical characteristics of endoscopes. The device we designed for determining the boundaries of the field of view of endoscopes is easy to manufacture, requires less time for testing and enables to determine the actual viewing angles of the endoscope quicker and more effectively. Actual optical characteristics of endoscopes may differ from the standards.

Minimally Invasive Aortic Root Replacement with Valved Conduits through Partial Upper Sternotomy

2017 ◽  
Vol 66 (04) ◽  
pp. 295-300 ◽  
Author(s):  
Mosab Alshakaki ◽  
Sven Martens ◽  
Mirela Scherer ◽  
Julia Hillebrand
Keyword(s):  
Minimally Invasive ◽  
Aortic Root ◽  
Operative Procedure ◽  
Median Sternotomy ◽  
Clinical Results ◽  
Aortic Root Replacement ◽  
Conventional Approach ◽  
Surgical Access ◽  
Secondary Bleeding ◽  
Minimally Invasive Access

Background Minimally invasive surgical access through limited sternotomy reduces trauma and morbidity in cardiosurgical patients. However, until now, it is not the standard access for aortic root replacement. This study details our clinic's experience with minimally invasive implantation of valved conduits through partial upper sternotomy and the comparison to conventional full median sternotomy. Methods Between January 2012 and March 2016, a total of 187 patients underwent aortic root replacement with valved conduits in our department. Minimally invasive access through partial upper sternotomy (group A) was performed in 33 patients (9 female, 24 male; mean age: 55.68 ± 13.24 years). Four of these patients received concomitant mitral and tricuspid valve interventions. The results were compared with similar procedures through conventional approach (group B): 25 patients (7 female, 18 male; mean age: 59.09 ± 12.32 years). Results In all 33 cases of minimally invasive access and 25 cases of conventional approach, aortic root replacement was successful. Operative times were as follows (in minutes; groups A and B)—cardiopulmonary bypass: 166.12 ± 40.61 and 162.88 ± 45.89; cross-clamp time: 122.24 ± 27.42 and 113.44 ± 22.57, respectively. In both groups, two patients needed postoperative reexploration due to secondary bleeding. One multimorbid patient suffered from postoperative stroke and died on the ninth postoperative day due to heart failure. The observed operation times and clinical results after minimally invasive surgery are comparable to conduit implantation through full median sternotomy. Conclusions Partial upper sternotomy is a feasible access for safe aortic root replacement with valved conduits. Nevertheless, minimally invasive aortic root replacement is a challenging operative procedure.

scholarly journals Caution is needed in interpreting the results of comparative studies regarding oncological operations by minimally invasive versus laparotomic access

2020 ◽  
Vol 47 ◽  
Author(s):  
PEDRO RICARDO DE OLIVEIRA FERNANDES ◽  
FRANCISCO AMÉRICO FERNANDES NETO ◽  
DURVAL RENATO WOHNRATH ◽  
VINÍCIUS DE LIMA VAZQUEZ
Keyword(s):  
Minimally Invasive ◽  
Clinical Decision Making ◽  
Conflicts Of Interest ◽  
Clinical Decision ◽  
Randomized Controlled Clinical Trials ◽  
Surgical Access ◽  
Comparative Group ◽  
The Difference ◽  
Minimally Invasive Access ◽  
The Comparative Study

ABSTRACT We aim to alert the difference between groups while comparing studies of abdominal oncological operations performed either by minimally invasive or laparotomic approaches and potential conflicts of interest in presenting or interpreting the results. Considering the large volume of scientific articles that are published, there is a need to consider the quality of the scientific production that leads to clinical decision making. In this regards, it is important to take into account the choice of the surgical access route. Randomized, controlled clinical trials are the standard for comparing the effectiveness between these interventions. Although some studies indicate advantages in minimally invasive access, caution is needed when interpreting these findings. There is no detailed observation in each of the comparative study about the real limitations and potential indications for minimally invasive procedures, such as the indications for selected and less advanced cases, in less complex cavities, as well as its elective characteristic. Several abdominal oncological operations via laparotomy would not be plausible to be completely performed through a minimally invasive access. These cases should be carefully selected and excluded from the comparative group. The comparison should be carried out, in a balanced way, with a group that could also have undergone a minimally invasive access, avoiding bias in selecting those cases of minor complexity, placed in the minimally invasive group. It is not a question of criticizing the minimally invasive technologies, but of respecting the surgeon’s clinical decision regarding the most convenient method, revalidating the well-performed traditional laparotomy route, which has been unfairly criticized or downplayed by many people.

scholarly journals Analysis of Quality of Life in Patients after Surgical Correction of Ascending Aortic Pathology Using Minimally Invasive Access

2020 ◽  
pp. 49-52
Author(s):  
V. V. Vayda ◽  
V. I. Kravchenko ◽  
I. I. Zhekov ◽  
I. M. Kravchenko
Keyword(s):  
Quality Of Life ◽  
Minimally Invasive ◽  
Treatment Method ◽  
Correct Choice ◽  
Ascending Aorta ◽  
Surgical Correction ◽  
Surgical Access ◽  
Aortic Pathology ◽  
Minimally Invasive Access

The assessment of quality of life-associated health is an important factor in determining the severity of the condition and the strategy for choosing surgical access in the treatment of patients with ascending aorta pathology. Introduction. Given that the use of minimally invasive access in the correction of aortic valve disease in combination with ascending aortic pathology accelerates the functional recovery of patients, reduces patient’s stay in hospital, this issue requires careful approach and the only correct choice of treatment method. Aim. To evaluate the quality of life of patients using post-operative SF-36 general medical questionnaire after surgical correction of ascending aorta pathology through J-shaped upper ministernotomy compared with traditional access. Materials and methods. In the SI “National Amosov Institute of Cardiovascular Surgery of the NAMS of Ukraine” from 2016 to 2019 we analyzed the data of 126 patients with ascending aorta pathology. All patients were divided into two groups, depending on the choice of surgical access. Patients were sequentially examined and selected for surgical correction of ascending aorta pathology. Conclusions. Our study has proved that the use of minimally invasive access improves the quality of life of patients in the postoperative period and is safe for patients.

Assessment of Pain During Laser-based Procedures in the Treatment of Glaucoma

2019 ◽  
Vol 70 (6) ◽  
pp. 2105-2107
Author(s):  
Gheorghita Popa ◽  
Olimpiu L. Karancsi ◽  
Maria Alexandra Preda ◽  
Marius Cristian Suta ◽  
Lavinia Stelea ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Pain Score ◽  
The Other ◽  
Study Group ◽  
Moderate Pain ◽  
Pain Level ◽  
Analog Scale ◽  
Intense Pain ◽  
The Individual ◽  
Individual Information

Our study aimed to determine pain levels and the state of welfare connected to laser-based procedures in the treatment of patients diagnosed with uncontrolled glaucoma. The study group included 100 eyes of 100 patients diagnosed with glucoma, 50 of them being treated with micropulse transscleral laser cyclophotocoagulation, and the other 50 eyes being treated with continuous transscleral laser cyclophotocoagulation. We used visual analog scale to gather information from each patient. After analysing the individual information the following results were obtained: the pain level for the micropulse transscleral laser cyclophotocoagulation was 60.23 mm, signifying moderate pain; and the pain score for the continuous transscleral laser cyclophotocoagulation was 76.34 mm, corresponding to moderate-intense pain. Pain level generated by minimally invasive laser procedures is discussed.

scholarly journals DL-based segmentation of endoscopic scenes for mitral valve repair

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Matthias Ivantsits ◽  
Lennart Tautz ◽  
Simon Sündermann ◽  
Isaac Wamala ◽  
Jörg Kempfert ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Minimally Invasive ◽  
Mitral Valve Repair ◽  
Video Stream ◽  
Field Of View ◽  
Valve Repair ◽  
Distance Measurements ◽  
Anatomical Structures ◽  
Endoscopic Video ◽  
Camera Position

AbstractMinimally invasive surgery is increasingly utilized for mitral valve repair and replacement. The intervention is performed with an endoscopic field of view on the arrested heart. Extracting the necessary information from the live endoscopic video stream is challenging due to the moving camera position, the high variability of defects, and occlusion of structures by instruments. During such minimally invasive interventions there is no time to segment regions of interest manually. We propose a real-time-capable deep-learning-based approach to detect and segment the relevant anatomical structures and instruments. For the universal deployment of the proposed solution, we evaluate them on pixel accuracy as well as distance measurements of the detected contours. The U-Net, Google’s DeepLab v3, and the Obelisk-Net models are cross-validated, with DeepLab showing superior results in pixel accuracy and distance measurements.

scholarly journals Real-Time Expanded Field-of-View for Minimally Invasive Surgery Using Multi-Camera Visual Simultaneous Localization and Mapping

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2106
Author(s):  
Ahmed Afifi ◽  
Chisato Takada ◽  
Yuichiro Yoshimura ◽  
Toshiya Nakaguchi
Keyword(s):  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Real Time ◽  
Invasive Surgery ◽  
Simultaneous Localization And Mapping ◽  
Field Of View ◽  
Time Dynamic ◽  
Matrix Estimation ◽  
Localization And Mapping

Minimally invasive surgery is widely used because of its tremendous benefits to the patient. However, there are some challenges that surgeons face in this type of surgery, the most important of which is the narrow field of view. Therefore, we propose an approach to expand the field of view for minimally invasive surgery to enhance surgeons’ experience. It combines multiple views in real-time to produce a dynamic expanded view. The proposed approach extends the monocular Oriented features from an accelerated segment test and Rotated Binary robust independent elementary features—Simultaneous Localization And Mapping (ORB-SLAM) to work with a multi-camera setup. The ORB-SLAM’s three parallel threads, namely tracking, mapping and loop closing, are performed for each camera and new threads are added to calculate the relative cameras’ pose and to construct the expanded view. A new algorithm for estimating the optimal inter-camera correspondence matrix from a set of corresponding 3D map points is presented. This optimal transformation is then used to produce the final view. The proposed approach was evaluated using both human models and in vivo data. The evaluation results of the proposed correspondence matrix estimation algorithm prove its ability to reduce the error and to produce an accurate transformation. The results also show that when other approaches fail, the proposed approach can produce an expanded view. In this work, a real-time dynamic field-of-view expansion approach that can work in all situations regardless of images’ overlap is proposed. It outperforms the previous approaches and can also work at 21 fps.

Dental Implants and Plasma Rich in Fibrine: A Wide Literary Review

2021 ◽  
pp. 34-41
Author(s):  
Carlos Fernando Almeida da Silva ◽  
Tayná Toder Santos ◽  
Idiberto José Zotarelli Filho ◽  
Elias Naim Kassis
Keyword(s):  
Bone Formation ◽  
Maxillary Sinus ◽  
Dental Implants ◽  
Case Reports ◽  
Bone Grafts ◽  
Sinus Surgery ◽  
Autogenous Bone ◽  
Platelet Concentrates ◽  
Surgical Access ◽  
Short Implants

Introduction: When a dental element is lost in the posterior region of the maxilla, there is natural reabsorption of the alveolar process and at the same time there will be pneumatization of the maxillary sinus. It will increase its volume towards the place where the roots existed and this will often make it difficult or impossible to restore implants in place. For this reason, the procedure for elevating the floor of the maxillary sinus or short implants should be performed when possible. In this context, allogeneic, xenogenous, and alloplastic bone grafts are an alternative for the treatment of bone defects in the jaws, since they avoid the need for a second surgical access. However, due to the need for processing to eliminate antigenic components, these grafts are only osteoconductive with a lower bone formation potential compared to autogenous bone grafts. Also, in this context, in the last 20 years, platelet concentrates have been proposed as regenerative materials in tissue regeneration procedures. Among the platelet concentrates proposed in the literature, PRP and FRP are found to act as autogenous platelet aggregates with osteoinductive properties. Objective: The present study aimed to conduct a wide literature review on maxillary sinus surgery using fibrin-rich plasma. Methods: Experimental and clinical studies (case reports, retrospective, prospective and randomized) with qualitative and/or quantitative analysis were included. Results: The total of 48 articles were found involving Maxillary sinus surgery, Fibrin-rich plasma, and Biomaterials, of which 22 were selected to compose the present study. Conclusion: Based on the literary findings, it was shown that the FRP is favorable for bone formation processes for dental implants, especially when combined with xenografts.

scholarly journals Importance of Laparoscopy to Solve the Diagnostic Dilemma of Abdominal Tuberculosis

KYAMC Journal ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 14-17
Author(s):  
Md Saiful Islam ◽  
Md Masudar Rahman ◽  
M Fardil Hossain Faisal ◽  
Md Alamgir Jalil Pramanik ◽  
Muhammad Abdur Rouf
Keyword(s):  
Minimally Invasive ◽  
Diagnostic Laparoscopy ◽  
Abdominal Cavity ◽  
Correct Diagnosis ◽  
Abdominal Tuberculosis ◽  
Diagnostic Dilemma ◽  
Peritoneal Tissue ◽  
Appropriate Treatment ◽  
Liver Surface ◽  
Minimally Invasive Access

Background: Diagnosis of abdominal tuberculosis as well as histopathological confirmation is difficult because of suboptimal access to the intraperitoneal pathology. Laparoscopy provides minimally invasive access to the peritoneal cavity and materials can be collected for confirmation of diagnosis. Objectives: To study the importance of laparoscopy as a tool for the diagnosis of abdominal tuberculosis and initiation of appropriate treatment without delay. Materials & Methods: In this study 25 patients with suspected abdominal tuberculosis were selected within the period of May, 2014 to October, 2014. Diagnostic laparoscopy performed on all patients with biopsy of tissue from accessible sites. Results: Diagnostic laparoscopy with biopsy confirmed the diagnosis in 24 (96%) patients, 23 of these patients (96%) had nodules at different site of abdominal cavity and 19 of these patients (76%) had ascites. In two cases there were nodules over liver surface; biopsy was taken also from both liver nodules. One nodule revealed fibrosis and another nodule revealed tuberculosis. Conclusion: Imaging and culture of ascitic fluid may fail to confirm or exclude abdominal tuberculosis in clinically suspected cases. Laparoscopy with peritoneal tissue biopsy provided rapid and correct diagnosis of abdominal tuberculosis and should be performed early in suspected cases. KYAMC Journal.2021;12(01): 14-17

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