scholarly journals Preoperative Planning of Spiral Intestinal Lengthening and Tailoring: A Geometrical Approach

2021 ◽  
Vol 8 (2) ◽  
pp. 20
Author(s):  
Riccardo Coletta ◽  
Elisa Mussi ◽  
Francesca Uccheddu ◽  
Yary Volpe ◽  
Antonino Morabito
Keyword(s):  
Intestinal Absorption ◽  
Surgical Procedures ◽  
Preoperative Planning ◽  
Pathological Condition ◽  
Intestinal Wall ◽  
Patient Specific ◽  
Geometrical Approach ◽  
Extensive Resection ◽  
Intestinal Transit Time ◽  
Intestinal Lengthening

Short bowel syndrome is a pathological condition resulting from extensive resection of the intestine, generally performed due to congenital abnormalities, Crohn’s disease, mesenteric ischemia, or neoplasms. The main consequence of this syndrome is a reduction of intestinal absorption, which causes malnutrition and dehydration. In the most severe cases, specific and complex surgical procedures are requested to manage the syndrome. Such procedures consist of the intestinal lengthening, with lead to an increase of absorptive mucosal surface and intestinal transit time and an overall enhancement of intestinal absorption. One of the most promising surgical procedures is spiral intestinal lengthening and tailoring, which consists of a spiral incision of the intestinal wall and in the elongation longitudinally of the intestine by sliding one flap over the other. The final intestinal lengthening is strictly dependent on a series of parameters, some of which are defined by the surgeon. The present paper proposes a mathematical model, based on patient specific anatomical data, which aims to help the surgeon in defining the optimal parameters for the intervention and in foreseeing its outcomes from the preoperative planning phase. Such a tool can assist the physician in the surgery room by improving the procedure and reducing surgical times.

Full tractography for detecting the position of cranial nerves in preoperative planning for skull base surgery: technical note

2020 ◽  
Vol 132 (5) ◽  
pp. 1642-1652 ◽  
Author(s):  
Timothee Jacquesson ◽  
Fang-Chang Yeh ◽  
Sandip Panesar ◽  
Jessica Barrios ◽  
Arnaud Attyé ◽  
...  
Keyword(s):  
Skull Base ◽  
Preoperative Planning ◽  
Skull Base Surgery ◽  
Cranial Nerves ◽  
Patient Specific ◽  
Small Scale ◽  
Skull Base Tumor ◽  
Skull Base Tumors ◽  
Brain White Matter ◽  
Human Connectome Project

OBJECTIVEDiffusion imaging tractography has allowed the in vivo description of brain white matter. One of its applications is preoperative planning for brain tumor resection. Due to a limited spatial and angular resolution, it is difficult for fiber tracking to delineate fiber crossing areas and small-scale structures, in particular brainstem tracts and cranial nerves. New methods are being developed but these involve extensive multistep tractography pipelines including the patient-specific design of multiple regions of interest (ROIs). The authors propose a new practical full tractography method that could be implemented in routine presurgical planning for skull base surgery.METHODSA Philips MRI machine provided diffusion-weighted and anatomical sequences for 2 healthy volunteers and 2 skull base tumor patients. Tractography of the full brainstem, the cerebellum, and cranial nerves was performed using the software DSI Studio, generalized-q-sampling reconstruction, orientation distribution function (ODF) of fibers, and a quantitative anisotropy–based generalized deterministic algorithm. No ROI or extensive manual filtering of spurious fibers was used. Tractography rendering was displayed in a tridimensional space with directional color code. This approach was also tested on diffusion data from the Human Connectome Project (HCP) database.RESULTSThe brainstem, the cerebellum, and the cisternal segments of most cranial nerves were depicted in all participants. In cases of skull base tumors, the tridimensional rendering permitted the visualization of the whole anatomical environment and cranial nerve displacement, thus helping the surgical strategy.CONCLUSIONSAs opposed to classical ROI-based methods, this novel full tractography approach could enable routine enhanced surgical planning or brain imaging for skull base tumors.

Preliminary results using patient-specific 3d printed models to improve preoperative planning for correction of post-traumatic tibial deformities with circular frames

Injury ◽  
2018 ◽  
Vol 49 ◽  
pp. S51-S59 ◽  
Author(s):  
Pablo S. Corona ◽  
Matías Vicente ◽  
Kevin Tetsworth ◽  
Vaida Glatt
Keyword(s):  
Preoperative Planning ◽  
Patient Specific ◽  
Preliminary Results ◽  
3D Printed ◽  
Post Traumatic

scholarly journals Current Practice in Preoperative Virtual and Physical Simulation in Neurosurgery

2020 ◽  
Vol 7 (1) ◽  
pp. 7 ◽  
Author(s):  
Elisa Mussi ◽  
Federico Mussa ◽  
Chiara Santarelli ◽  
Mirko Scagnet ◽  
Francesca Uccheddu ◽  
...  
Keyword(s):  
Clinical Practice ◽  
3D Printing ◽  
Surgical Planning ◽  
Physical Simulation ◽  
Planning Process ◽  
Preoperative Planning ◽  
Cost Effective ◽  
Patient Specific ◽  
Anatomical Models ◽  
Standard Clinical Practice

In brain tumor surgery, an appropriate and careful surgical planning process is crucial for surgeons and can determine the success or failure of the surgery. A deep comprehension of spatial relationships between tumor borders and surrounding healthy tissues enables accurate surgical planning that leads to the identification of the optimal and patient-specific surgical strategy. A physical replica of the region of interest is a valuable aid for preoperative planning and simulation, allowing the physician to directly handle the patient’s anatomy and easily study the volumes involved in the surgery. In the literature, different anatomical models, produced with 3D technologies, are reported and several methodologies were proposed. Many of them share the idea that the employment of 3D printing technologies to produce anatomical models can be introduced into standard clinical practice since 3D printing is now considered to be a mature technology. Therefore, the main aim of the paper is to take into account the literature best practices and to describe the current workflow and methodology used to standardize the pre-operative virtual and physical simulation in neurosurgery. The main aim is also to introduce these practices and standards to neurosurgeons and clinical engineers interested in learning and implementing cost-effective in-house preoperative surgical planning processes. To assess the validity of the proposed scheme, four clinical cases of preoperative planning of brain cancer surgery are reported and discussed. Our preliminary results showed that the proposed methodology can be applied effectively in the neurosurgical clinical practice both in terms of affordability and in terms of simulation realism and efficacy.

Patient-specific three-dimensional printed heart models benefit preoperative planning for complex congenital heart disease

2019 ◽  
Vol 15 (3) ◽  
pp. 246-254 ◽  
Author(s):  
Jia-Jun Xu ◽  
Yu-Jia Luo ◽  
Jin-Hua Wang ◽  
Wei-Ze Xu ◽  
Zhuo Shi ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Patient Specific ◽  
Complex Congenital Heart Disease

Application of virtual endoscopy to patient-specific planning of endovascular surgical procedures

2001 ◽  
Author(s):  
Oscar Acosta ◽  
Pascal Haigron ◽  
Antoine Lucas ◽  
Marc-Emmanuel Bellemare
Keyword(s):  
Surgical Procedures ◽  
Virtual Endoscopy ◽  
Patient Specific

Preoperative planning of surgical procedures on the hand using a bone model made from the polymer clay

2020 ◽  
Vol 27 (2) ◽  
pp. 5-9
Author(s):  
Alexander S. Zolotov ◽  
Julia A. Dyachkova ◽  
Ilya S. Sidorenko
Keyword(s):  
Surgical Procedures ◽  
Preoperative Planning ◽  
Clinical Use ◽  
Bone Model ◽  
Metacarpal Bones

The authors proposed a method of preoperative planning of surgical procedures on the hand using a bone model made from polymer clay. A detailed description of the method and an example of its clinical use are given. This method proved to be effective in treatment of seven patients with deformities of the phalanx of fingers and metacarpal bones. The proposed method of preoperative planning helps the surgeon to perform the intended operation correctly.

scholarly journals Computer-Assisted Planning and Three-Dimensional-Printed Patient-Specific Instrumental Guide for Corrective Osteotomy in Post-Traumatic Femur Deformity: A Case Report and Literature Review

2018 ◽  
Vol 24 (1) ◽  
pp. 12-17 ◽  
Author(s):  
Lau Chi-Kay ◽  
Chui King-him ◽  
Lee Kin-bong ◽  
Li Wilson
Keyword(s):  
Lower Limb ◽  
New Technologies ◽  
Preoperative Planning ◽  
Corrective Osteotomy ◽  
Three Dimensional ◽  
Patient Specific ◽  
Computer Assisted ◽  
Limb Deformity ◽  
Satisfactory Outcome ◽  
Post Traumatic

Post-traumatic limb deformity is often multiplanar and thus is a difficult pathology to deal with surgically. Precise preoperative planning and accurate intraoperative execution are two main important steps that lead to satisfactory outcome. Computer-assisted planning and three-dimensional-printed patient-specific instrumental guides provide excellent aid to the two steps, respectively. We report a case of posttraumatic lower limb deformity in a patient who underwent closing wedge corrective osteotomy with the aid of the aforementioned new technologies.

scholarly journals Predisposing factors of intestinal intussusception in older children

2019 ◽  
pp. 136-140
Author(s):  
I. Kh. Shidakov
Keyword(s):  
Clinical Symptoms ◽  
Pathological Condition ◽  
Abdominal Cavity ◽  
Intestinal Wall ◽  
Predisposing Factors ◽  
Surgical Pathology ◽  
Older Children ◽  
Intestinal Intussusception ◽  
Resection And Anastomosis

The article provides a brief description of the causes and mechanisms of intestinal intussusception and a description of two cases of invagination in children over 7 years. The occurrence of intestinal intussusception in children older than 1 year often has a pathological leading point – a disease or pathological condition, as a result, of the course or complication of which it is possible to introduce one section of the intestine into another. Two children, 8 and 7 years old, were hospitalized at our clinic with signs of acute surgical pathology in the abdominal cavity, were operated on in an emergency order. In both cases, necrosis of the intestinal area, as a result, of invagination was detected, resection and anastomosis were performed. The leading points in these cases were Schönlein-Genoch purpura and Peutz-Jeghers polyps. Invagination of the intestines in these diseases occurs with atypical clinical symptoms, making it difficult to diagnose in time and leads to more frequent development of ischemia and necrosis of the intestinal wall.

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