Article

Understanding and optimizing laparoscopic videosystems.

Department of General Surgery/A80, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
Surgical Endoscopy (Impact Factor: 3.43). 09/2001; 15(8):781-7. DOI:10.1007/s004640000391
Source: PubMed

ABSTRACT As tactile feedback and degree of freedom for instrument movement are restricted in laparoscopic surgery, the video image plays the most crucial role in giving the surgeon information about the performance of the operation. The development of small, reliable, high-resolution imaging systems is essential for the surgeon's acquisition detailed information about the tissues being manipulated. Image quality depends on each component of the laparoscopic imaging unit. In this context, it is crucial for the surgeon to have an understanding of how the video signal is formed, transmitted, and displayed. Moreover, the surgeon also needs to have an idea about the basic principles and specifications of the surgical video systems (i.e. charge-coupled device (CCD) camera, monitors, and digitizers). This knowledge is essential for choosing pieces of equipment and knowing how to assemble them into a functional operating suite. The aim of this review is to provide the surgeon with the basics of video signaling, and to familiarize him or her with the technical principles of the surgical video systems. An insight into the future of laparoscopic video systems also is made, and practical tips for improving image quality and troubleshooting are given throughout the article.

0 0
 · 
0 Bookmarks
 · 
44 Views
  • Source
    [show abstract] [hide abstract]
    ABSTRACT: Minimally Invasive Surgery is the most important revolution in surgical technique since the early 1900s. Its development was facilitated by the introduction of miniaturized video cameras with good image reproduction. The marvels of electronic and information technology have strengthened the biochemical and molecular power of diagnosis and the surgical and medical management of gynecology, transforming the very practice of medical science into a reality that could barely be envisaged two decades ago. We now enter the age of Robotics, Telesurgery, and Therapeutic Cloning. This dynamic process of reform continues to deliver practitioners with information, ideas and tools that spell answers to some of the most pressing dilemmas in clinical management. New technology will provide us with better opportunities of vision of the operative field, such as 3-D Endoscopy. Other promising technologies such as incorporation of ultrasonography, magnetic resonance imaging, laser-based technology or assisted optical coherence tomography will not only enhance better visualization of the surgical field, but also discriminate the pathologic tissue from the normal one, enabling the surgeon to excise the pathologic tissue accurately. Pain mapping and photodiagnosis offer a new direction in the diagnosis of microscopic endometriosis. Better detection of the disease results in higher chances of success following treatment.
    International journal of health sciences. 01/2007; 1(1):81-8.
  • Source
    [show abstract] [hide abstract]
    ABSTRACT: Since its first described case in 1991, laparoscopic colon surgery has lagged behind minimally invasive surgical methods for solid intra-abdominal organs in terms of acceptability, dissemination, and ease of learning. In colon cancer, initial concerns over port site metastases and adequacy of oncologic resection have considerably dampened early enthusiasm for this procedure. Only recently, with the publication of several large, randomized controlled trials, has the incidence of port site metastases been shown to be equivalent to that of open resection. Laparoscopic surgery for colon cancer has also been demonstrated to be at least equivalent to traditional laparotomy in terms of adequacy of oncologic resection, disease recurrence, and long-term survival. In addition, numerous reports have validated short-term benefits following laparoscopic resection for cancer, including shorter hospital stay, shorter time to recovery of bowel function, and decreased analgesic requirements, as well as other postoperative variables. In benign colonic disease, much less high-quality literature exists supporting the use of laparoscopic methods. Two recent randomized controlled trials have demonstrated some short-term benefits to laparoscopic ileocolic resection for CD, in addition to evident cosmetic advantages. On the other hand, the current evidence on laparoscopic surgery for UC does not support its routine use among nonexpert surgeons outside of specialized centers. Laparoscopic colonic resection for diverticular disease appears to provide several short-term benefits, although these advantages may not translate to cases of complicated diverticulitis. Despite the increasing acceptability of minimally invasive methods for the management of benign and malignant colonic pathologies, laparoscopic colon resection remains a prohibitively difficult technique to master. Numerous technological innovations have been introduced onto the market in an effort to decrease the steep learning curve associated with laparoscopic colon surgery. Good evidence exists supporting the use of second-generation, sleeveless, hand-assist devices in this context. Similarly, new hemostatic devices such as the ultrasonic scalpel and the electrothermal bipolar vessel sealer may be particularly helpful for extensive colonic mobilizations, in which several vascular pedicles must be taken. The precise role of these hemostatic technologies has yet to be established, particularly in comparison with stapling devices and significantly cheaper laparoscopic clips. Finally, recent advances in camera systems are promising to improve the ease with which difficult colonic dissections can be performed.
    Surgical Clinics of North America 09/2006; 86(4):867-97. · 2.02 Impact Factor
  • [show abstract] [hide abstract]
    ABSTRACT: High definition (HD) digital imaging represents a major advance in endoscope technology. The development of the charge-coupled device chip and its location at the distal end of the endoscope allows for image capture and digitization, as well as specific light filtration and processing. We assessed the capability of HD technology combined with digital imaging to provide improved image quality and enhanced spatial three-dimensional positioning. A HD digital laparoscope and a standard definition (SD) laparoscope were evaluated in the laboratory setting to assess and compare image resolution, brightness, contrast, and color reproducibility, using standard industry testing protocols. Compared with the SD laparoscope, the HD laparoscope had superior resolution at 50 mm distance (2.4 line pairs/mm v 2.0 line pairs/mm), increased image brightness (129 lumens v 112 lumens), increased depth of field, and decreased distortion. Color and grayscale reproduction were found to be similar for the two laparoscopes. HD laparoscopy has superior objective performance characteristics compared with standard laparoscopes. Further investigation is required to determine whether these objective findings translate into subjective improvements, and which characteristics can be adjusted to obtain the best possible results. These improved optics may lead to easier identification of anatomic structures, finer dissection, and enhanced three-dimensional spatial positioning during HD laparoscopic procedures.
    Journal of endourology / Endourological Society 04/2009; 23(3):523-8. · 1.75 Impact Factor

Full-text

View
1 Download
Available from

Eren Berber