Design and Fabrication of Laser-Machined Hinge Joints on Miniature Tubes for Steerable Medical Devices

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Shivanand Pattanshetti ◽  
Seok Chang Ryu
Keyword(s):  
Range Of Motion ◽  
Medical Devices ◽  
Surgical Techniques ◽  
Surgical Instruments ◽  
Machining Parameters ◽  
Future Design ◽  
New Class ◽  
Minimally Invasive Surgical ◽  
Interference Range ◽  
In Series

With the proliferation of successful minimally invasive surgical techniques, comes the challenge of shrinking the size of surgical instruments further to facilitate use in applications such as neurosurgery, pediatric surgery, and needle procedures. This paper introduces laser machined, multi-degree-of-freedom (DOF) hinge joints embedded on tubes, as a possible means to realize such miniature instruments without the need for any assembly. A method to design such a joint for an estimated range of motion was explored. The effects of design and machining parameters on the mechanical interference, range of motion, and joint dislocation were analyzed. The extent of interference between the moving parts of the joint can be used to predict the range of motion of the joint for rigid tubes and future design optimization. The total usable workspace was also estimated using kinematic principles for a joint in series and for two sets of orthogonal joints. Our work can open up avenues to a new class of miniature robotic medical devices with hinge joints and a usable channel for drug delivery.

Application of Pulsating Vacuum Cleaning Technology to Medical Devices Cleaning

2022 ◽  
Vol 12 (5) ◽  
pp. 984-988
Author(s):  
Yan-Qiu Yang ◽  
Shuo-Yang Zhao
Keyword(s):  
Minimally Invasive ◽  
Medical Devices ◽  
Surgical Instruments ◽  
Loading Capacity ◽  
Complex Structures ◽  
Cleaning Efficiency ◽  
Minimally Invasive Surgical ◽  
Cleaning Machine ◽  
Vacuum Cleaning ◽  
Cleaning Technology

This study aims to solve existing problems in cleaning medical devices, such as the cumbersome loading of minimally invasive surgical instruments, the incomplete cleaning of instruments with complex structures, and the low cleaning efficiency of ordinary instruments. A pulsating vacuum cleaning machine was combined with ultrasonic cleaning and boiling cleaning technology to clean various complex medical devices through a pressure pulsating process (i.e., repetitive pump-out and pumpin until the cleaning results meet the cleaning standards for medical devices). The cleaning results of spay washing, ultrasound cleaning and pulsating vacuum cleaning were compared among four groups of medical devices, including silica gel hoses, chamber instruments, whole box of minimally invasive instruments and surgical instruments. The amount of protein residues was tested using the spectrophotometric method. The testing results revealed that the loading capacity of a pulsating vacuum cleaning machine is 3–4 times as much as that of an ordinary spray cleaning machine, without manual placement and connection operation required, which reduced the workload of pretreatment. The protein residue after cleaning meets the requirements of the YY/T0734 standard for the cleaning effect of medical devices. Pulsating vacuum cleaning technology has an overall better loading capacity, when compared to spay washing and ultrasound cleaning, and this can make up for the shortcomings of commonly used cleaning machines, such as the low cleaning efficiency and unsatisfactory cleaning results of medical devices with complex structures.

scholarly journals A review of the bio-tribology of medical devices

Friction ◽  
2021 ◽  
Author(s):  
Xiaogang Zhang ◽  
Yali Zhang ◽  
Zhongmin Jin
Keyword(s):  
Service Life ◽  
Medical Devices ◽  
Tribological Behavior ◽  
Tribological Performance ◽  
Dental Restoration ◽  
Surgical Instruments ◽  
Cardiovascular Devices ◽  
Artificial Joints ◽  
Future Developments ◽  
Fixation Devices

AbstractNumerous medical devices have been applied for the treatment or alleviation of various diseases. Tribological issues widely exist in those medical devices and play vital roles in determining their performance and service life. In this review, the bio-tribological issues involved in commonly used medical devices are identified, including artificial joints, fracture fixation devices, skin-related devices, dental restoration devices, cardiovascular devices, and surgical instruments. The current understanding of the bio-tribological behavior and mechanism involved in those devices is summarized. Recent advances in the improvement of tribological properties are examined. Challenges and future developments for the prospective of bio-tribological performance are highlighted.

Minimally Invasive Surgical Techniques to Treat Spine Infection S

1996 ◽  
Vol 27 (1) ◽  
pp. 183-199 ◽  
Author(s):  
Larry M. Parker ◽  
Paul C. McAfee ◽  
Ira L. Fedder ◽  
James C. Weis ◽  
W. Peter Geis
Keyword(s):  
Minimally Invasive ◽  
Surgical Techniques ◽  
Spine Infection ◽  
Minimally Invasive Surgical

Kinematics of a Fully-Decoupled Remote Center-of-Motion Parallel Manipulator for Minimally Invasive Surgery

2012 ◽  
Vol 6 (2) ◽  
Author(s):  
Chin-Hsing Kuo ◽  
Jian S. Dai
Keyword(s):  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Invasive Surgery ◽  
Inverse Kinematics ◽  
Parallel Manipulator ◽  
Degrees Of Freedom ◽  
Surgical Instruments ◽  
End Effector ◽  
Minimally Invasive Surgical ◽  
Inverse Kinematics Problem

A crucial design challenge in minimally invasive surgical (MIS) robots is the provision of a fully decoupled four degrees-of-freedom (4-DOF) remote center-of-motion (RCM) for surgical instruments. In this paper, we present a new parallel manipulator that can generate a 4-DOF RCM over its end-effector and these four DOFs are fully decoupled, i.e., each of them can be independently controlled by one corresponding actuated joint. First, we revisit the remote center-of-motion for MIS robots and introduce a projective displacement representation for coping with this special kinematics. Next, we present the proposed new parallel manipulator structure and study its geometry and motion decouplebility. Accordingly, we solve the inverse kinematics problem by taking the advantage of motion decouplebility. Then, via the screw system approach, we carry out the Jacobian analysis for the manipulator, by which the singular configurations are identified. Finally, we analyze the reachable and collision-free workspaces of the proposed manipulator and conclude the feasibility of this manipulator for the application in minimally invasive surgery.

FUNCTIONAL OUTCOME OF DISTAL FEMORAL FRACTURES AND THEIR MANAGEMENT

2021 ◽  
Vol 5 (6) ◽  
Author(s):  
Raman Shrivastava ◽  
Namita Shrivastava
Keyword(s):  
Functional Outcome ◽  
Surgical Techniques ◽  
Femoral Fractures ◽  
Railway Track ◽  
Distal Femoral Fractures ◽  
Minimally Invasive Surgical ◽  
Fall From Height ◽  
Classification Management ◽  
A Prospective Study ◽  
Jawaharlal Nehru

Background: Fractures of distal end of femur are complex injuries which are difficult to manage. These fractures often are unstable and comminuted. Despite advances in surgical techniques and improvement in implants, treatment of distal femoral fractures remains a challenge in many situations. This study was done to analyse the functional outcome and this management of distal femoral fractures. Material & Methods: This study has been done between August 2008 to March 2010 on patients coming to Orthopaedics Department at Jawaharlal Nehru Hospital and Research Center, Bhilai. It is a prospective study which includes 25 patients with 10 Type A, 7 Type B and 8 Type C fractures of distal femur after fulfilling the inclusion and exclusion criteria. Results: Mean age of 47.08 years with sex incidence of 3.17:1(M:F). Mode of injury was RTA in 16, simple fall in 6, fall from height in 2 and railway track accident in 1 patient. There were 5-A1, 1-A2, 4-A3, 3-B1, 1-B2, 3-B3, 1-C1, 4-C2 and 3-C3 fractures. Results were found to be excellent in 17, good in 1, moderate in 3 and poor in 4 patients. Conclusion: We conclude that minimally invasive surgical techniques and with the availability of locking type of plates distal femoral fractures can now be dealt with more precessions and more satisfactory results can be produced. Keywords: Distal fractures, Muller Classification, Management, Femoral fractures

scholarly journals Surgical techniques: past, present and future

2012 ◽  
Vol 2 (1) ◽  
pp. 9 ◽  
Author(s):  
Karim Qayumi
Keyword(s):  
Middle Ages ◽  
Technological Progress ◽  
Surgical Techniques ◽  
Neolithic Period ◽  
Minimally Invasive Surgical ◽  
Surgical Methods ◽  
Modern Hospital ◽  
The 19Th Century ◽  
Further Development ◽  
Shed Light

The aim of this paper is to provide an analytical survey of the information available on the development of past and present surgical techniques, and to make projections for the future. For the purposes of this paper, the <em>Past</em> starts in the Neolithic period and ends in the 1800s. In this context, I have divided the <em>Past</em> into <em>Prehistoric</em>, <em>Ancient</em> and <em>Middle Ages</em>, and this period ends in the second half of the 19th century when the major obstacles to the further development of surgery, such as overcoming pain and infection, were removed. We will discuss the development of surgical techniques, and the obstacles and opportunities prevalent in these periods. In the context of this paper, the <em>Present</em> begins in 1867, when Louis Pasteur discovered microorganisms, and ends in the present day. There have been many important changes in the development of surgical techniques during this period, such as the transfer of surgery from the unsterile operating room to the modern hospital operating theater, the development of advanced and specialized surgical practices, such as transplants and laparoscopy, and minimally invasive surgical methods, robotic and Natural Orifice Transluminal Endoscopic Surgery. It is very difficult to foresee how surgical techniques will develop in the <em>Future</em> because of the unpredictable nature of technological progress. Therefore, in this paper, the forecast for the <em>Future</em> is limited to the next 50- 100 years and is a realistic calculation based on already existing technologies. In this context, the <em>Future</em> is divided into the development of surgical techniques that will develop in the <em>near</em> and <em>distant</em> future. It is anticipated that this overview will shed light on the historical perspective of surgical techniques and stimulate interest in their further development.

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