A Bulk Retrospective Study of Robot-Assisted Stereotactic Biopsies of Intracranial Lesions Guided by Videometric Tracker

Background: Biopsies play an important role in the diagnosis of intracranial lesions, and robot-assisted procedures are increasingly common in neurosurgery centers. This research investigates the diagnoses, complications, and technology yield of 700 robotic frameless intracranial stereotactic biopsies conducted with the Remebot system.Method: This research considered 700 robotic biopsies performed between 2016 and 2020 by surgeons from the Department of Functional Neurosurgery in Beijing's Tiantan Hospital. The data collected included histological diagnoses, postoperative complications, operation times, and the accuracy of robotic manipulation.Results: Among the 700 surgeries, the positive rate of the biopsies was 98.2%. The most common histological diagnoses were gliomas, which accounted for 62.7% of cases (439/700), followed by lymphoma and germinoma, which accounted for 18.7% (131/700) and 7.6% (53/700). Bleeding was found in 14 patients (2%) by post-operation computed tomography scans. A total of 29 (4.14%) patients had clinical impairments after the operation, and 9 (1.29%) experienced epilepsy during the operation. The post-biopsy mortality rate was 0.43%. Operation time—from marking the cranial point to suturing the skin—was 16.78 ± 3.31 min (range 12–26 min). The target error was 1.13 ± 0.30 mm, and the entry point error was 0.99 ± 0.24 mm.Conclusion: A robot-assisted frameless intracranial stereotactic biopsy guided by a videometric tracker is an efficient, safe, and accurate method for biopsies.

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Improving diagnosis of acute appendicitis with atypical findings by Tc-99m HMPAO leukocyte scan

Nuklearmedizin ◽

10.1055/s-0038-1623994 ◽

2002 ◽

Vol 41 (01) ◽

pp. 37-41 ◽

Cited By ~ 3

Author(s):

S. Shung-Shung ◽

S. Yu-Chien ◽

Y. Mei-Due ◽

W. Hwei-Chung ◽

A. Kao

Keyword(s):

Acute Appendicitis ◽

False Positive ◽

False Positive Rate ◽

Accurate Method ◽

Clinical Findings ◽

Pathological Findings ◽

Lower Quadrant ◽

Predictive Values ◽

Positive Rate

Summary Aim: Even with careful observation, the overall false-positive rate of laparotomy remains 10-15% when acute appendicitis was suspected. Therefore, the clinical efficacy of Tc-99m HMPAO labeled leukocyte (TC-WBC) scan for the diagnosis of acute appendicitis in patients presenting with atypical clinical findings is assessed. Patients and Methods: Eighty patients presenting with acute abdominal pain and possible acute appendicitis but atypical findings were included in this study. After intravenous injection of TC-WBC, serial anterior abdominal/pelvic images at 30, 60, 120 and 240 min with 800k counts were obtained with a gamma camera. Any abnormal localization of radioactivity in the right lower quadrant of the abdomen, equal to or greater than bone marrow activity, was considered as a positive scan. Results: 36 out of 49 patients showing positive TC-WBC scans received appendectomy. They all proved to have positive pathological findings. Five positive TC-WBC were not related to acute appendicitis, because of other pathological lesions. Eight patients were not operated and clinical follow-up after one month revealed no acute abdominal condition. Three of 31 patients with negative TC-WBC scans received appendectomy. They also presented positive pathological findings. The remaining 28 patients did not receive operations and revealed no evidence of appendicitis after at least one month of follow-up. The overall sensitivity, specificity, accuracy, positive and negative predictive values for TC-WBC scan to diagnose acute appendicitis were 92, 78, 86, 82, and 90%, respectively. Conclusion: TC-WBC scan provides a rapid and highly accurate method for the diagnosis of acute appendicitis in patients with equivocal clinical examination. It proved useful in reducing the false-positive rate of laparotomy and shortens the time necessary for clinical observation.

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Face Recognition Using the SR-CNN Model

Sensors ◽

10.3390/s18124237 ◽

2018 ◽

Vol 18 (12) ◽

pp. 4237 ◽

Cited By ~ 9

Author(s):

Yu-Xin Yang ◽

Chang Wen ◽

Kai Xie ◽

Fang-Qing Wen ◽

Guan-Qun Sheng ◽

...

Keyword(s):

Face Recognition ◽

Target Position ◽

Operation Time ◽

True Positive Rate ◽

Processing Unit ◽

True Positive ◽

Face Database ◽

Acceleration Ratio ◽

Computational Performance ◽

Positive Rate

In order to solve the problem of face recognition in complex environments being vulnerable to illumination change, object rotation, occlusion, and so on, which leads to the imprecision of target position, a face recognition algorithm with multi-feature fusion is proposed. This study presents a new robust face-matching method named SR-CNN, combining the rotation-invariant texture feature (RITF) vector, the scale-invariant feature transform (SIFT) vector, and the convolution neural network (CNN). Furthermore, a graphics processing unit (GPU) is used to parallelize the model for an optimal computational performance. The Labeled Faces in the Wild (LFW) database and self-collection face database were selected for experiments. It turns out that the true positive rate is improved by 10.97–13.24% and the acceleration ratio (the ratio between central processing unit (CPU) operation time and GPU time) is 5–6 times for the LFW face database. For the self-collection, the true positive rate increased by 12.65–15.31%, and the acceleration ratio improved by a factor of 6–7.

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Letters to the Editor

PEDIATRICS ◽

10.1542/peds.68.1.144a ◽

1981 ◽

Vol 68 (1) ◽

pp. 144-145

Author(s):

Lachlan Ch De Crespigny ◽

Hugh P. Robinson

Keyword(s):

Real Time ◽

Linear Array ◽

False Positive Rate ◽

False Negative ◽

False Negative Rate ◽

Letters To The Editor ◽

Premature Babies ◽

Computed Tomography Scans ◽

Positive Rate ◽

Time Linear

We read with interest the report which suggested that the diagnosis of cerebroventricular hemorrhage ([CVH] including both subependymal [SEH] and intraventricular) with real time ultrasound was unreliable.1 Ultrasound, when compared with computed tomography scans, had a 35% false-positive rate and a 21% false-negative rate. In our institution over a 12-month period more than 200 premature babies have been examined (ADR real time linear array scanner with a 7-MHz transducer).

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Is Robot-assisted Radical Cystectomy the Preferred Minimal Invasive Procedure for Non-advanced Bladder Urothelial Carcinoma(T1-T2N0M0)? A Single Center Retrospective Study.

10.21203/rs.3.rs-40429/v1 ◽

2020 ◽

Author(s):

Ming Xiao ◽

Zhaohui Zhong ◽

Jiannan Ren ◽

Wei Xiong

Keyword(s):

Urothelial Carcinoma ◽

Radical Cystectomy ◽

Operation Time ◽

Invasive Procedure ◽

Minimal Invasive ◽

Postoperative Treatment ◽

Transfusion Rate ◽

Robot Assisted ◽

Bladder Urothelial Carcinoma ◽

Hospitalization Costs

Abstract Background: To investigate the perioperative efficacy and cost of robot-assisted radical cystectomy(RARC) and laparoscopic RC(LRC) in patients with non-advanced bladder urothelial carcinomaMethods: 156 patients with non-advanced bladder urothelial carcinoma undergoing minimally invasive radical cystectomy in our center between January 2015 and April 2020 were included. Perioperative data and hospitalization expenses were extracted from our database. All analyses were performed using SPSS 23.0 software, and p < 0.05 was considered statistically significant.Results: The proportion of male patients was 86.5%(135/156) and the median age was 65(IQR 59-71) years old. RARC had a lower PSM rate (0 vs 5.3%,P=0.051), longer median operation time(370 vs 305 min,P<0.001) and higher median hospitalization cost(20565.2 vs 15532.4$,P<0.001). There were no significant differences in intraoperative transfusion rate, anesthesia resuscitation in ICU, postoperative hospital stay, 30-d complications and postoperative treatment expenses between the two groups(P=0.815,0.715, 0.817,0.92 and 0.543,respectively.)Conclusion: Short operation time and low hospitalization costs are favorable factors for LRC, but RARC may be the preferred surgical procedure for non-advanced bladder urothelial carcinoma considering the potentially low PSM rate.Trial registration: A complete informed consent was obtained from the patient and their families before the surgery.Informed consent was signed for all patients.This study was approved by the Ethics Review Committee of the Second Xiangya Hospital of Central South University

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Robot-assisted Nipple-sparing Mastectomy with Immediate Breast Reconstruction: An Initial Experience

Scientific Reports ◽

10.1038/s41598-019-51744-2 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 3

Author(s):

Hyung Seok Park ◽

Jeea Lee ◽

Dong Won Lee ◽

Seung Yong Song ◽

Dae Hyun Lew ◽

...

Keyword(s):

Breast Cancer ◽

Breast Reconstruction ◽

Learning Curve ◽

Operation Time ◽

Immediate Breast Reconstruction ◽

Robot Assisted ◽

Open Conversion ◽

Areolar Complex ◽

Nipple Sparing Mastectomy ◽

Nipple Sparing

Abstract Seeking smaller and indistinct incisions, physicians have attempted endoscopic breast surgery in breast cancer patients. Unfortunately, there are some limitations in the range of movement and visualization of the operation field. Potentially addressing these limitations, we investigated the outcomes of gas and gasless robot-assisted nipple-sparing mastectomy (RANSM) with immediate breast reconstruction (IBR). Ten patients underwent 12 RANSM with IBR between November 2016 and April 2018. Patients with tumors measuring >5 cm in diameter, tumor invasion of the skin or nipple-areolar complex, proven metastatic lymph nodes, or planned radiotherapy were excluded. Age, breast weight, diagnosis, tumor size, hormone receptor status, and operation time were retrospectively collected. Postoperative outcomes including postoperative complications and final margin status of resected were analyzed. The median total operation time and console time were 351 min (267–480 min) and 51 min (18–143 min), respectively. The learning curve presented as a cumulative sum graph showed that the console time decreased and then stabilized at the eighth case. There was no open conversion or major postoperative complication. One patient had self-resolved partial nipple ischemia, and two patients experienced partial skin ischemia. We deemed that RANSM with IBR is safe and feasible for early breast cancer, benign disease of the breast, and BRCA 1/2 mutation carriers. RANSM is an advanced surgical method with a short learning curve.

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Impact of an Ultrasonically Activated Device in Robot-Assisted Distal Gastrectomy

Innovations Technology and Techniques in Cardiothoracic and Vascular Surgery ◽

10.1097/imi.0000000000000437 ◽

2017 ◽

Vol 12 (6) ◽

pp. 453-458

Author(s):

Makoto Hikage ◽

Masanori Tokunaga ◽

Rie Makuuchi ◽

Yutaka Tanizawa ◽

Etsuro Bando ◽

...

Keyword(s):

Gastric Cancer ◽

Blood Loss ◽

Surgical Outcomes ◽

Distal Gastrectomy ◽

Operation Time ◽

Patient Characteristics ◽

Clinicopathological Characteristics ◽

Robot Assisted ◽

Estimated Blood Loss ◽

Device Use

Objective Robot-assisted gastrectomy is increasingly used for the treatment of gastric cancer, although it remains a time-consuming procedure. An ultrasonically activated device might be useful to shorten operation times. This study therefore assessed the effect of ultrasonically activated device use on procedural times and on other early surgical outcomes. Methods Consecutive patients (N = 42) who underwent robot-assisted distal gastrectomy for gastric cancer were included. Clinicopathological characteristics and early surgical outcomes were compared between robotic-assisted gastrectomy procedures using an ultrasonically activated device (U group, n = 21) and those without it (NU group, n = 21). Results There were no significant differences in patient characteristics between the groups; however, the median operation time was significantly less in the U group than in the NU group (291 vs 351 minutes, P = 0.006). In detail, the median duration of console time until dividing the duodenum was less in the U group (70 vs 102 minutes, P < 0.001). Estimated blood loss, incidence of postoperative morbidity, and duration of postoperative hospital stay were not different between the groups. Conclusions An ultrasonically activated device reduced the operation time of robot-assisted gastrectomy without increasing blood loss and morbidity.

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Feline Cerebrovascular Disease: Clinical and Histopathologic Findings in 16 Cats

Journal of the American Animal Hospital Association ◽

10.5326/jaaha-ms-5480 ◽

2011 ◽

Vol 47 (2) ◽

pp. 89-97 ◽

Cited By ~ 26

Author(s):

Ulrike Michal Altay ◽

Geoff C. Skerritt ◽

Monika Hilbe ◽

Felix Ehrensperger ◽

Frank Steffen

Keyword(s):

Cerebrovascular Disease ◽

Clinical Signs ◽

Intracranial Hemorrhages ◽

Cerebrospinal Fluid Analysis ◽

Fluid Analysis ◽

Computed Tomography Scans ◽

Intracranial Lesions ◽

Cerebrovascular Lesion ◽

Histopathologic Findings ◽

Underlying Pathology

Sixteen cats with cerebrovascular disease confirmed via histology to be of nontraumatic and nonneoplastic origins are described. In addition, the anatomy of the arterial supply of the cat's brain is reviewed. It is suggested that this unique arterial design may influence the incidence of cerebrovascular accidents in this species. Of the 16 cats reviewed, seven cats had ischemic infarctions, five had hemorrhagic infarctions, and four were diagnosed with intracranial hemorrhage. The median age was 8 yr and 9.5 yr in cats with infarctions and intracranial hemorrhages, respectively. Clinical signs were severe, acute, consistent with the localization of the cerebrovascular lesion, and influenced by underlying pathology. Four cats with infarction showed lateralized neurologic signs. Four cats with infarctions were diagnosed with pulmonary disease antemortem and three cats had hyperthyroidism. Cerebrospinal fluid analysis and computed tomography scans were available in two cats. None of the infarctions were grossly visible. All cats with hemorrhagic infarcts had severe liver pathology and nephritis was identified in four cats. Hypoxia was a feature in four cats and one cat suffered cardiac failure. In conclusion, the clinical picture is influenced by the type of cerebrovascular disease, the localization of the intracranial lesions, and any underlying pathology.

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PRELIMINARY EXPERIENCE OF THE AORTO-FEMORAL SHUNTING USING THE DA VINCI SURGICAL SYSTEM

Creative Surgery and Oncology ◽

10.24060/2076-3093-2018-8-1-7-13 ◽

2018 ◽

Vol 8 (1) ◽

pp. 7-13

Author(s):

V. N. Pavlov ◽

V. V. Plechev ◽

R. I. Safiullin ◽

V. Sh. Ishmetov ◽

M. Sh. Kashaev ◽

...

Keyword(s):

Blood Loss ◽

Da Vinci ◽

Intensive Therapy ◽

Federal District ◽

Da Vinci Surgical System ◽

Clinical Effects ◽

Robot Assisted ◽

Robot Surgery ◽

Post Operation ◽

Surgical System

Introduction. Robot surgery is one of the most high-demand and dynamic developing realms of medicine. It is widely used in urology, proctology, thoracic, cardiovascular surgery and gynecology. In February 2018 a robot surgery centre opened in Volga Federal District of the Russian Federation based on the clinic of the Bashkir State Medical University (city of Ufa).Materials and methods. The present paper demonstrates the first successful robot-assisted vascular operations within a master-class called "Aorto-Femoral Shunting with the use of robot-assisted surgical system Da Vinci".Results. Exemplified with three operations: two linear aorto-femoral shunting and lumbar sympathectomy demonstrate technical peculiarities and advantages of robot-assisted vascular surgery. The findings show positive short-term results of the performed surgical interference that combine minimal injury and blood loss which help to reduce hospital stay in an intensive therapy department and intestinal distention duration. These clinical effects enabled to provide early activization of patients and possibility to adequately correct nutritional status with enteral feeding. The above-mentioned advantages eventually resulted in reduction of post-operation stay of patients in in-patient department and of cost of treatment.Conclusion. Robot-assisted surgical system Da Vinci being the most cutting-edge in the realm of endoscopic surgery, enables to carry out operational interference with minimal blood loss and injury of tissues which helps to reduce postoperation and recovery periods.

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Clinical Application of a Neurosurgical Robot in Intracranial Ommaya Reservoir Implantation

Frontiers in Neurorobotics ◽

10.3389/fnbot.2021.638633 ◽

2021 ◽

Vol 15 ◽

Author(s):

Huan-Guang Liu ◽

De-Feng Liu ◽

Kai Zhang ◽

Fan-Gang Meng ◽

An-Chao Yang ◽

...

Keyword(s):

Blood Loss ◽

Minimally Invasive ◽

Operation Time ◽

Hole Diameter ◽

Drainage Tube ◽

Ommaya Reservoir ◽

Implantation Technique ◽

Intraoperative Blood Loss ◽

Robot Assisted ◽

Robot Assisted Surgery

Background: The Ommaya reservoir implantation technique allows for bypass of the blood-brain barrier. It can be continuously administered locally and be used to repeatedly flush the intracranial cavity to achieve the purpose of treatment. Accurate, fast, and minimally invasive placement of the drainage tube is essential during the Ommaya reservoir implantation technique, which can be achieved with the assistance of robots.Methods: We retrospectively analyzed a total of 100 patients undergoing Ommaya reservoir implantation, of which 50 were implanted using a robot, and the remaining 50 were implanted using conventional surgical methods. We then compared the data related to surgery between the two groups and calculated the accuracy of the drainage tube of the robot-assisted group.Results: The average operation time of robot-assisted surgery groups was 41.17 ± 11.09 min, the bone hole diameter was 4.1 ± 0.5 mm, the intraoperative blood loss was 11.1 ± 3.08 ml, and the average hospitalization time was 3.9 ± 1.2 days. All of the Ommaya reservoirs were successful in one pass, and there were no complications such as infection or incorrect placement of the tube. In the conventional Ommaya reservoir implantation group, the average operation time was 65 ± 14.32 min, the bone hole diameter was 11.3 ± 0.3 mm, the intraoperative blood loss was 19.9 ± 3.98 ml, and the average hospitalization time was 4.1 ± 0.5 days. In the robot-assisted surgery group, the radial error was 2.14 ± 0.99 mm and the axial error was 1.69 ± 1.24 mm.Conclusions: Robot-assisted stereotactic Ommaya reservoir implantation is quick, effective, and minimally invasive. The technique effectively negates the inefficiencies of craniotomy and provides a novel treatment for intracranial lesions.

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Application of nano-carbon and titanium clip combined labeling in robot-assisted laparoscopic transverse colon cancer surgery

10.21203/rs.3.rs-40555/v2 ◽

2020 ◽

Author(s):

Nan Lin ◽

Jiandong Qiu ◽

Junchuan Song ◽

Changwei Yu ◽

Yongchao Fang ◽

...

Keyword(s):

Colon Cancer ◽

Transverse Colon ◽

Operation Time ◽

Cancer Surgery ◽

Colon Tumor ◽

Transverse Colon Cancer ◽

Robot Assisted ◽

Plain Films ◽

Colon Cancer Surgery ◽

Nano Carbon

Abstract Background: Robot-assisted laparoscopic transverse colon tumor surgery requires precise tumor localization. The purpose of this study was to evaluate the safety and efficacy of nano-carbon and titanium clip combination labeling methods in robot-assisted transverse colon tumor surgery.Methods: From January 2018 to January 2019, the clinical data of 16 patients who underwent preoperative nano-carbon and titanium clip combined with robot-assisted laparoscopic transverse colon cancer surgery were retrospectively analyzed.Results: Of the 16 patients, no signs of abdominal pain, fever, or diarrhea were observed after colonoscopy. Two titanium clips were seen on all of the 16 patients' abdominal plain films. Nano-carbon staining sites were observed during the operation, and no staining disappeared or abdominal cavity contamination. All patients underwent R0 resection. The average number of lymph nodes harvsted was 18.23±5.04 (range, 9-32). The average time to locate the lesion under the laparoscopic was 3.03±1.26 min(range, 1-6min), and the average operation time was 321.43±49.23 min (range, 240-400min). All were consistent with the surgical plan, and there was no intraoperative change of surgical procedure or conversion to open surgery.Conclusion: Preoperative colonoscopy combined with nano-carbon and titanium clip is safe and effective in robot-assisted transverse colon cancer surgery. A At the same time, the labeling method shows potential in shortening the operation time, ensuring sufficient safety margin and reducing complications.

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