By: Christopher Whaley PhD
For the purposes of therapeutic applications cancer ribbon color for osteosarcoma buy leukeran amex, the far field is effectively out of reach breast cancer awareness color of your bra cheap leukeran 5mg online. The specific impedance of a tissue will be determined by its density and elasticity cancer research review leukeran 5 mg discount. In order for the maximal transmission of energy from one medium to another cancer quotes to support generic leukeran 5 mg overnight delivery, the impedance of the two media needs to be as similar as possible is cancer and virgo a good mix buy leukeran 2mg with amex. The greater the difference in impedance at a boundary, the greater the reflection that will occur, and therefore, the smaller the amount of energy that will be transferred. The coupling media used in this context include water, various oils, creams and gels. For a good discussion regarding coupling media, see Casarotto et al 2004, Docker et al 1982, Griffin, 1980, Klucinec et al 2000 and Williams 1987. Water is an effective media and can be used as an alternative but clearly it fails to meet the above criteria in terms of its viscosity. There is no realistic (clinical) difference between the gels in common clinical use (Poltawski and Watson 2007). The authors report that employment of adequate disinfection techniques was effective in significantly reducing these levels (they used Protex, Parker Laboratories). Therapeutic Ultrasound Tim Watson 2015 Page 3 Ultrasound Application the Critical Angle In addition to the reflection that occurs at a boundary due to differences in impedance, there will also be some refraction if the wave does not strike the boundary surface at 90?. The table below gives some indication of typical (or average) half value depths for therapeutic ultrasound. The table gives an approximate reduction in energy levels with typical tissues at two commonly used frequencies, and more detailed information is found in the dose calculation material and on the web pages ( Tissues can be ranked according to their relative tissue absorption and this is critical in terms of clinical decision making (Watson, 2008). Recent evidence of the ineffectiveness of such an intervention can be found in Wilkin et al (2004) and Markert et al (2005) whilst application in tissue that is a better absorber will, as expected, result in a more effective intervention (e. The physiological effects of ultrasound are almost identical to those of Pulsed Shortwave and Laser therapy the key difference however, is that ultrasound energy is preferentially absorbed in different tissue to the other modalities as summarised in the adjacent diagram. Until recently, the pulse duration (the time during which the machine is on) was almost exclusively 2ms (2 thousandths of a second) with a variable off period. Some machines now offer a variable on time though whether this is of clinical significance has yet to be determined. Typical pulse ratios are 1:1 and 1:4 though others are available (see dose calculations). Some machines offer pulse parameters that do not appear to be supported from the literature (e. Mode Pulse Ratio Duty Cycle Some manufacturers describe their Continuous N/A 100% pulsing in terms of a percentage Pulsed 1:1 50% rather than a ratio (1:1 = 50% 1:4 = 1:2 33% 20% etc). The pulse ratio (duty cycle) is at say 1:4 (20%), but there is an option to alter the pulse frequency. There is no evidence that I can find to suggest that one mode of operation has any clinical advantage over another. It is not intended to be a complete explanation of these phenomena or a comprehensive review of the current literature. It may, none the less, provide some useful basic information for clinical application. Many papers have concentrated on the thermal effectiveness of ultrasound, and much as it can be used -2 effectively in this way when an appropriate dose is selected (continuous mode >0. Both Nussbaum (1998) and ter Haar (1999) have provided some useful review material with regards the thermal effects of ultrasound. Comparative studies on the thermal effects of ultrasound have been reported by several authors (e. Draper et al 1993, 1995a,b, Leonard et al 2004) with some interesting, and potentially useful results. It is almost inevitable that both will occur, but it is furthermore reasonable to argue that the dominant effect will be influenced by treatment parameters, especially the mode of application i. It can be used to selectively raise the temperature of particular tissues due to its mode of action. Among the more effectively heated tissues are periosteum, collagenous tissues (ligament, tendon & fascia) & fibrotic muscle (Dyson 1981). If the temperature of the damaged tissues is raised to 40-45?C, then a hyperaemia will result, the effect of which will be therapeutic. In addition, temperatures in this range are also thought to help in initiating the resolution of chronic inflammatory states (Dyson & Suckling 1978). This is the formation & growth of gas bubbles by accumulation of dissolved gas in the medium. These bubbles then collapse very quickly releasing a large amount of energy which is detrimental to tissue viability. There is no evidence at present to suggest that this phenomenon occurs at therapeutic levels if a good technique is used. Sodium ion permeability is altered resulting in changes in the cell membrane potential. Calcium ion transport is modified which in turn leads to an alteration in the enzyme control mechanisms of various metabolic processes, especially concerning protein synthesis & cellular secretions. The result of the combined effects of stable cavitation and acoustic streaming is that the cell membrane becomes ?excited (up regulates), thus increasing the activity levels of the whole cell. In essence, the sound wave travelling through the medium is claimed to cause molecules to vibrate, possibly enhancing tissue fluid interchange & affecting tissue mobility. The process is more complex than be described here, but there are several interesting recent papers and reviews including (Wener & Grose 2003, Toumi & Best 2003, Watson 2003, 2006, Hill et al 2003, Neidlinger-Wilke et al 2002, Lorena et al 2002, Latey 2001, Velnar et al 2009, Hauser et al 2013). The various phases of tissue repair can be usefully represented by the ?blocks in the figure to the left. The division into Bleeding, Inflammatory, Proliferative and Remodelling phases is almost arbitrary in that from a tissue perspective, this is in fact one continuous series of events, with a change in emphasis with time. Further details, reviews and reference materials can be found in the publications identified above or from the web site at : For example, the application of ultrasound induces the degranulation of mast cells, causing the release of arachidonic acid which itself is a precursor for the synthesis of prostaglandins and leukotreine which act as inflammatory mediators (Mortimer & Dyson 1988, Nussbaum 1997, Leung et al 2004). The benefit of this mode of action is not to ?increase the inflammatory response as such (though if applied with too greater intensity at this stage, it is a possible outcome (Ciccone et al 1991), but rather to act as an ?inflammatory optimiser (Watson 2007, 2008). The inflammatory response is essential to the effective repair of tissue, and the more efficiently the process can complete, the more effectively the tissue can progress to the next phase (proliferation). Studies which have tried to demonstrate the anti inflammatory effect of ultrasound have failed to do so (e. It is effective at promoting the normality of the inflammatory events, and as such has a therapeutic value in promoting the overall repair events (ter Haar 99, Watson 2008). A further benefit is that the inflammatory chemically mediated events are associated with stimulation of the next (proliferative) phase, and hence the promotion of the inflammatory phase also acts as a promoter of the proliferative phase. For tissues in which there is an inflammatory reaction, but in which there is no ?repair to be achieved, the benefit of ultrasound is to promote the normal resolution of the inflammatory events, and hence resolve the ?problem this will of course be most effectively achieved in the tissues that preferentially absorb ultrasound i. Harvey et al (1975) demonstrated that low dose pulsed ultrasound increases protein synthesis and several research groups have demonstrated enhanced fibroplasia and collagen synthesis (Enwemeka et al 1989, 1990, Turner et al 1989, Huys et al 1993, Ramirez et al 1997, Warden et al 2006, Zhang et al 2004). A scar in ligament will not ?become ligament, but will behave more like a ligamentous tissue. Ultrasound applied to tissues enhances the functional capacity of the scar tissues (Nussbaum 1998, Huys et al 1993, Tsai et al 2006, 2011, Yeung et al 2006). The role of ultrasound in this phase may also have the capacity to influence collagen fibre orientation as demonstrated in an elegant study by Byl et al (1996), though their conclusions were quite reasonably somewhat tentative. Therapeutic Ultrasound Tim Watson 2015 Page 9 the application of ultrasound during the inflammatory, proliferative and repair phases is not of value because it changes the normal sequence of events, but because it has the capacity to stimulate or enhance these normal events and thus increase the efficiency of the repair phases (ter Haar 99, Watson 2007, 2008, Watson & Young, 2008). It would appear that if a tissue is repairing in a compromised or inhibited fashion, the application of therapeutic ultrasound at an appropriate dose will enhance this activity. If the tissue is healing ?normally?, the application will, it would appear, speed the process and thus enable the tissue to reach its endpoint faster than would otherwise be the case. Essentially, the application of very low dose ultrasound over a fracture (whether healing normally or delayed or non union) can be of significant benefit. The main clinical issue is that the effective ?dose is actually lower than most therapy machines can deliver which is frustrating! Higher intensity ultrasound over a fracture can initiate a strong pain response which is useful when it comes to using the modality to locate potential stress fractures (see below). Much of this work is still in development, though results and publications are anticipated (reviewed in Khanna et al, 2009). Examples of additional bone related papers include El Bialy et al (2002) who evaluated its effects during distraction osteogenesis. Ahmadi et al (2012) have usefully reviewed both bioeffects and safety issues at this frequency range. A separate Low Frequency (Longwave) Ultrasound information page and pdf download are available from the web pages ( Some claim (anecdotally) that it is very effective whilst others dismiss the technique. If there is a stress fracture (or other significant bony injury) it is common for a sharp pain to be felt by the patient. Ultrasound Therapy for Wound Healing : There have been a range of research papers over the years which have set out to evaluate the benefits (or otherwise) of ultrasound therapy as a means to stimulate healing in chronic wounds (typically venous ulcers and pressure sores). Whilst some research has not demonstrated significant clinical benefit, others have clearly done so, and therefore, as with other wound based Therapeutic Ultrasound Tim Watson 2015 Page 10 electrophysical agent applications, it is likely to be a dose dependent response. Cullum et al (2010) contributed a Cochrane review on this topic, though only 8 trials were included (I have over 400 papers the in one way or another consider ultrasound and wound healing). Bell et al, 2008; Stanisic et al, 2005) whilst Serena et al (2009) and Harris et al (2014) identify its potential benefit in relation to wound bacterial counts. An example of a recent, well constructed trial for ultrasonic treatment of pressure ulcers can be found in Polak et al (2014). A study by Srbely et al (2007) raises some interesting points and demonstrates a measurable benefit. Other studies in this area include Sarrafzadeh et al (2012); Unalan et al (2011); Draper et al (2010); Aguilera et al (2009); Majlesi and Unalan (2004); Manca et al (2014). More recently Morishita et al (2014) have demonstrated some interesting effects of ultrasound (to trapezius), stretch and pain effects, which may link to trigger point applications. It was shown that pulsed ultrasound is more effective in terms of pain management and functional improvement compared with control conditions. There is an increasing body of evidence which supports the use of Ultrasound in chronic sinusitis and rhinosinusitis. This has been usefully reviewed in Bartley et al (2014) and detailed clinical trials can be found in Ansari et al (2014); Young et al (2010); Naghdi et al (2008); Ansari et al (2007). There is currently limited clinical research with regards any different effect none are expected the advantage being that (a) it is safe and (b) the therapist does not need to deliver the treatment in the classic way they can affix the applicator and proceed with other jobs. Home based Ultrasound : there is an increasing availability of home based ultrasound treatment options. The (potential) advantage is that the therapist need not use clinic time to deliver the treatment, and secondly, if ultrasound is at its most effective when delivered daily, it becomes a realistic option.
If the primary proceduralist is a surgeon cancer ribbon colors chart discount 5 mg leukeran with visa, then the other physician needs to be an interventional cardiologist cancer man match purchase leukeran with mastercard. In addition cervical cancer fighting foods list 2mg leukeran otc, the institution should possess an active cardiac pacemaker program with experienced cancer love horoscope today ganesha order cheapest leukeran and leukeran, competent physicians for both temporary and permanent pacemaker placement and management cancer research studies leukeran 2 mg visa. Also, each site within a system should have proceduralists and surgeons who spend at least 50% of their active practice time at that particular site and meet the minimum requirements of procedures for eligibility at that site to become a program. There will be no blanket eligibility for additional sites within a system based on the fact that 1 site within that system met eligibility requirements. By the 3rd year, new programs should have acquired sufficient experience for volume and outcomes analysis, although earlier clusters of poor outcomes require attention even if not yet statistically verified. These risk-adjusted outcomes metrics are useful not only for external review, but also for performance evaluation in order to focus quality improvement initiatives. Interest in minimally invasive approaches to reduce morbidity further are encouraging, with data suggesting reductions in blood transfusion and pain scores as well as improved respiratory function associated with alternative incisions (91). In contrast, Patel and colleagues demonstrated the opposite, with a hospital volume effect but no surgeon volume effect in Michigan in a more recent study performed using a statewide clinical database (93). This demonstrates the challenges of utilizing alternate database sources but confirms that the existence of an outcomes/volume relationship. Unsurprisingly, an outcomes/volume relationship holds for the more complex aortic root replacement procedures (100,101). Furthermore, the pulmonary autograft operation may restore the patient to the expected survival curve for an age-matched population (102). Just as there has been remarkable technological progress in transcatheter prostheses, improvements in both tissue and mechanical prostheses are lessening the burden of ?prosthetic valve disease. The durability of currently available fourth-generation tissue valves is yet to be seen, but improvements in design are increasing the use of tissue prostheses. The ViV option has important implications for planning the initial implant, including favoring larger prostheses to minimize the anticipated gradient after ViV deployment. A controversial question concerns the advisability of adding aortic root enlargement to accomplish this aim, although evidence suggests there is no increased operative risk in experienced hands (108). The ViV consideration may also favor stented over stentless xenograft procedures (109). Mechanical valve prostheses continue to play an important role despite the secular momentum in favor of placing tissue valves even in younger patients. Recent population-based data support arguments that, despite this trend, there may be a survival advantage associated with mechanical valves among patients in the 50?69 year age range (110). A reduction in bleeding events without increase in thromboembolism has also been demonstrated when telemedicine-guided anticoagulation with home testing is employed (112). The role of aortic valve repair procedures continues to be explored, offering hope for a solution free of ?prosthetic valve disease, with its risks of thrombosis, bleeding, infection, and structural deterioration. Valve-sparing and preserving interventions on the aortic root are also gaining wider application as an alternative to composite root replacement (115). The rationale for this is that no one individual, group, or specialty possesses all the necessary skills for optimal patient outcomes (13,17) and that the success of these programs depends on a group of professionals working together, each with their own skillset, to provide the best possible patient-centered care. This should include a thorough clinical and laboratory evaluation, as well as appropriate cardiac imaging (electrocardiogram, echocardiogram, coronary angiography, and computed tomography as needed). In addition, the patient should be informed about which therapies are available at their hospital. The volume and outcomes for aortic valve replacement for the site should be discussed with the patient. Compliance with professional society recommendations, while voluntary, is expected. This remains an evolving field with continual changes in indications, equipment, technique, and clinical outcomes. As the indications expand to younger patients, assessing the structural durability of the valve is critical. This document reflects the current state of the art and is designed to evolve with the field. Therefore, the mechanism of data presentation and interpretation will be determined using risk adjusted individual and composite outcomes based on the accumulation of data through the 4 most current rolling quarters of data, presented in a variety of formats including box and whisker plots (which do not account for random sampling variation, especially at lower volume programs), funnel plots (which visually demonstrate sampling variation at low volumes, and accommodate various control limits [e. The confidence intervals around a binary event such as death increase dramatically at lower volumes, producing a ?funnel on its side appearance with the wide end at low volumes. Because of these wide confidence intervals, the results from a low volume (small sample size) program have substantial statistical uncertainty. It is difficult to ascertain from this sample what the true underlying performance is of such a program. In contrast, the narrower confidence limits inherent with high volume programs (large sample size) means more certain estimate of their true underlying performance, enabling their observed performance to be compared with what would be expected for their case mix. To help mitigate the statistical challenges of evaluating low volume programs, a 3-year rolling data time frame is recommended to provide more observations and to better assess true differences in outcomes. In the future, composite, multidimensional performance measures will further increase the effective number of endpoints. Consistent with standard profiling practice, the committee recommends identifying true quality outliers as having risk-adjusted performance that is statistically significantly different than expected for their case mix, based on the overall performance of the benchmark population of providers for similar patients. Statistical significance is usually determined by assessing whether the 95% confidence intervals around the provider?s point estimate of risk-adjusted mortality include the overall average mortality, or whether the confidence intervals around their ratio of observed to expected mortality include unity (one). Low volume centers, particularly newer programs with less than 3 year rolling data, need to be vigilant in their own internal assessments if ?signals or ?trends for poor quality are appreciated despite not reaching a 95% confidence level due to the challenge of accurate assessment of low volume center quality. To provide larger sample sizes and greater statistical power, there will be a 2 year grace period for new sites to accumulate a sufficient number of cases before full accountability of outcomes is required. Prior to the completion of the two year grace period, worrisome trends in sub-optimal outcomes should be addressed with action plans to enhance clinical performance. Minimum yearly volume of cases is recommended to assure program process resources are maintained and statistical relevance of outcomes. For risk adjusted outcomes or funnel plots, less restrictive confidence intervals or control limits (e. In the latter case, the institution should sponsor an external review to assess the program and make performance improvement recommendations. Jude Medical Cardiac Surgery Washington Hospital Center Professor of Surgery this table represents the relationships of committee members with industry and other entities that were determined to be relevant to this document. These relationships were reviewed and updated in conjunction with all meetings and/or conference calls of the writing committee during the document development process. The table does not necessarily reflect relationships with industry at the time of publication. A person is deemed to have a significant interest in a business if the interest represents ownership of? Relationships that exist with no financial benefit are also included for the purpose of transparency. A list of corresponding comprehensive healthcarerelated disclosures for each reviewer is available online at jaccjacc. Min Official Reviewer?Task Force on Expert Consensus Dalio Institute of Cardiovascular Imaging at New York Presbyterian Hospital?Professor of Decision Pathways Radiology and Medicine; Director Richard L. Gillam Content Reviewer?Health Affairs Committee Morristown Medical Center?Chair, Department of Cardiovascular Medicine Henry S. Van Decker Content Reviewer?Health Affairs Committee Temple University Hospital?Assistant Professor of Medicine Frederick G. Transcatheter or Surgical AorticValve Replacement in Intermediate-Risk Patients. Transcatheter aortic valve replacement versus surgical valve replacement in intermediate-risk patients: a propensity score analysis. Performance Measurement: Accelerating Improvement (Pathways to Quality Health Care Series) / Edition 1. Conscious Sedation Versus General Anesthesia for Transcatheter Aortic Valve Replacement: Insights from the National Cardiovascular Data Registry Society of Thoracic Surgeons/American College of Cardiology Transcatheter Valve Therapy Registry. Results of the Society of Cardiac Angiography and Interventions survey of physicians and training directors on procedures for structural and valvular heart disease. Ethical issues for invasive cardiologists: Society for Cardiovascular Angiography and Interventions. Guidelines for credentialing of practitioners to perform endovascular stent-grafting of the thoracic aorta. Standardized endpoint definitions for transcatheter aortic valve implantation clinical trials: a consensus report from the Valve Academic Research Consortium. Implementing shared decision making in the rapidly evolving field of valvular heart disease. Letter by Frigerio et al regarding article, "Long-term outcomes of inoperable patients with aortic stenosis randomly assigned to transcatheter aortic valve replacement or standard therapy". Can we predict who will be alive and well after transcatheter aortic valve replacement? Can we predict quality of life and survival after transcatheter aortic valve replacement? Identifying patients who do not benefit from transcatheter aortic valve replacement. Advanced chronic kidney disease in patients undergoing transcatheter aortic valve implantation: insights on clinical outcomes and prognostic markers from a large cohort of patients. Moderate and severe preoperative chronic kidney disease worsen clinical outcomes after transcatheter aortic valve implantation: meta-analysis of 4992 patients. Transcatheter and surgical aortic valve replacement in dialysis patients: A propensitymatched comparison. Chronic obstructive pulmonary disease in patients undergoing transcatheter aortic valve implantation: insights on clinical outcomes, prognostic markers, and functional status changes. Outcomes of patients with severe chronic lung disease who are undergoing transcatheter aortic valve replacement. Significant mitral regurgitation left untreated at the time of aortic valve replacement: a comprehensive review of a frequent entity in the transcatheter aortic valve replacement era. Use of the Kansas City Cardiomyopathy Questionnaire for monitoring health status in patients with aortic stenosis. Development and Validation of a Risk Prediction Model for In-Hospital Mortality After Transcatheter Aortic Valve Replacement. Quality measurement in adult cardiac surgery: part 2-Statistical considerations in composite measure scoring and provider rating. Transcatheter valve therapy registry is a model for medical device innovation and surveillance. Subclinical leaflet thrombosis in surgical and transcatheter bioprosthetic aortic valves: an observational study. Transapical aortic valve implantation: learning curve with reduced operating time and radiation exposure. Transcatheter aortic valve implantation: lessons from the learning curve of the first 270 high-risk patients. Learning Alternative Access Approaches for Transcatheter Aortic Valve Replacement: Implications for New Transcatheter Aortic Valve Replacement Centers. Transapical aortic valve implantation: analysis of risk factors and learning experience in 299 patients.
Lumbar instruKornblum et al6 conducted a follow-up study on 47 of 58 mented posterolateral fusion in spondylolisthetic and failed patients who had originally been part of a randomized conback patients: a long-term follow-up study spanning 11-13 trolled trial comparing instrumented versus noninstrumented years cancer sign and scorpio 5 mg leukeran fast delivery. Minimum 5-year results of degenerative spondylolisthesis this study?s cohort consisted only of the noninstrumented cases greatest cancer fighting foods buy genuine leukeran on line, treated with decompression and instrumented posterior fusion the cancer journals quotes purchase generic leukeran on line. Degenerative lumbar spondylolisthesis percentage of patients had good or excellent results in patients with spinal stenosis: a prospective long-term study comparing with solid fusion (86%) versus pseudarthrosis (56%) cancer zodiac sign free vector cheap leukeran 5 mg overnight delivery. In critique of this study archer cancer rampage quotes cheap leukeran 5 mg with amex, the Bibliography from updated literature search authors used a less frequently implemented outcomes instru1. Dynamic stabilization using X-stop for high-grade childhood and adolescent isthmic spondylolisversus transpedicular screw fxation in the treatment of lumbar thesis: long-term outcome. Adjacent segment interbody fusion in comparison with transforaminal lumbar degeneration afer lumbar interbody fusion with percutaneinterbody fusion: implications for the restoration of foraminal ous pedicle screw fxation for adult low-grade isthmic sponheight, local disc angle, lumbar lordosis, and sagittal balance. Management of lumbar spine juxtafacet posterior decompression for spinal stenosis associated with cysts. Bone union rate with aufusion through a unilateral approach and percutaneous osteotologous iliac bone versus local bone graf in posterior lumbar synthesis. Dysfunctional segmental motion treated with dynamic Radiographic restoration of lumbar alignment afer transforamstabilization in the lumbar spine. Efcacy of unilatinterbody fusion using non resorbable poly-ether-ether-ketone eral laminectomy for bilateral decompression in lumbar spinal versus resorbable poly-L-lactide-co-D,L-lactide fusion devices. Radiological compariPosterior lumbar fusion by peek rods in degenerative spine: preson of instrumented posterior lumbar interbody fusion with one liminary report on 30 cases. Lamberg T, Remes V, Helenius I, Schlenzka D, Seitsalo S, Poussa 58 patients treated with anterior cervical decompression and M. Decompression and interinstrumented posterolateral fusions: report on safety and feasispinous dynamic stabilization using the locker for lumbar canal bility. A prospecgenerative Lumbar Conditions Using a Non-Treaded Locking tive randomised study on the long-term efect of lumbar fusion Screw System With a 90-Degree Locking Cap. Two-year clinical and trans-pedicular screw fxation in the treatment of lumbar canal radiographic success of minimally invasive lateral transpsoas stenosis: Comparative study of the clinical outcome. Minigraphic outcomes afer minimally invasive transforaminal mum 2-year follow-up result of degenerative spinal stenosis lumbar interbody fusion. World Neuroin the adjacent segments to the fusion site afer posterolateral surg. The efect of iliac crest delayed union afer posterior fusion with pedicle screw fxation. Surgical versus nonversus circumferential fusion using the B-Twin expandable spisurgical treatment for lumbar degenerative spondylolisthesis. Surgical compared transforaminal lumbar interbody fusion for the treatment of with nonoperative treatment for lumbar degenerative spondegenerative lumbar instability. Surgical treatment of adult degeneragraphic outcomes at 1 year: a preliminary report. J Spinal Disord tive spondylolisthesis by instrumented transforaminal lumbar Tech. Efterolateral fusion in a long-term perspective: cost-utility evaluafcacy of the Dynamic Interspinous Assisted Motion system in tion of a randomized controlled trial in severe, chronic low back clinical treatment of degenerative lumbar disease. Follow-up of patients with this clinical guideline should not be construed as including all proper methods of care or excluding or other acceptable methods of care reasonably directed to obtaining the same results. There is insuffcient evidence to make a recommendation for or against the infuence of a nonorganic pain drawing on the outcomes/prognosis of treatments for patients with degenerative lumbar spondylolisthesis. Grade of Recommendation: I (Insuffcient Evidence) Andersen et al1 investigated whether pain drawings predicted There is insuffcient evidence to make a outcome in patients undergoing lumbar spinal fusion. The study recommendation regarding the infuence of also assessed the diferences between spondylolisthesis patients age and three or more comorbidities on the and patients with degenerative disease as well as between patients with or without radicular pain. Patients over the age of outcomes of patients undergoing treatment 60 were excluded to make the patient population more compafor degenerative lumbar spondylolisthesis. Pain drawings were 2 Kalanthi et al conducted a retrospective study of degeneracomposed by outling each patient?s front, back and area under tive spondylolisthesis patients undergoing posterior lumbar fufeet. Patients were asked to indicate where their pain was ocsion to determine rates of in-patient complications and complex curring on the drawing. Six diferent symbols denoting diferent disposition for and evalaute the association of demographic levels of pain were used for the following: dull/aching, burning, variables. Based on visual results, pain drawings were classifed diagnostic and procedure codes specifying posterior lumbar fuas organic or nonorganic. Results indicatage, sex, race, number of comorbidities, hospital size and time ed that 90 pain drawings were deemed organic (67%) and 45 period of procedure. Multivariate analysis revealed an associawere deemed nonorganic pain drawings (33%). The reference group spondylolisthesis patients, patients with an organic pain drawwas defned as the age Group 45 to 64 years. Patients with 3 or more comorbidities were twice as drawing; however, this diference was not observed to the same likely to have complex disposition, regardless of age, when comextent in patients operated for degenerative disease. All patients in the trial had neurogenic claudication or raIt is important to note that in addition to obesity, obese patients dicular leg pain with associated neurologic signs, spinal stenosis had a signifcantly higher incidence of comorbidities, includshown on cross-sectional imaging, and degenerative spondyloing hypertension, diabetes and stomach problems (p<0. A listhesis shown on lateral radiographs obtained with the patient higher proportion of obese patients underwent instrumented in a standing position. Treatment was standard decompressive fusion and less underwent decompression alone compared to laminectomy, with or without fusion, or usual nonsurgical care, non-obese patients. The incidence of intraoperative complicawhich included at least physical therapy, education or counseling tions was signifcantly lower in the obese patient group; howon home exercises, and nonsteroidal anti-infammatory agents, ever, there was a trend toward increase rate of wound infection if tolerated. Investigators enrolled 304 patients in the randomin the obese patients compared to nonobese patients (5% vs. At 4 year follow-up, there was a signifcantly higher ized cohort, 159 patients were assigned to surgery and 145 were rate of reoperation in the obese patient group compared to the assigned to nonsurgical treatment. At 4 year follow-up to receive nonoperative care, 54% underwent surgery by 4 years. The diference Future Directions for Research in improvement among patients whose surgical or nonsurgical The work group recommends the undertaking of populationtreatment began less than or greater than 12 months afer the based observational studies, such as a multicenter registry data onset of symptoms was measured. In addition, the diference in studies, to examine the clinical characteristics associated with improvement with surgical versus nonsurgical treatment (treatpoor medical/interventional or surgical treatment in patients ment efect) was determined at each follow-up period for each with degenerative lumbar spondylolisthesis. The predictive the treatment outcome of patients with degenerative spondylovalue of pain drawings in lumbar spinal fusion surgery. National complication rates tion does not impact nonoperative or surgical treatment success and disposition afer posterior lumbar fusion for acquired spondylolisthesis. Does the duration of symptoms in patients with spinal stenosis and degenerative spondylolisthesis afect outcomes? The long-term results of surgical treatBibliography ment for spinal stenosis in the elderly. Kawakami M, Tamaki T, Ando M, Yamada H, Hashizume H, Process Decompression System: proposal for a novel anatomic Yoshida M. Lumbar sagittal balance infuences the clinical outscoring system for patient selection and review of the literature. Radiographic prediclumbar spinal stenosis in patients with and without deformity. The erative disc disorders: an analysis of the literature from two impact of sagittal balance on clinical results afer posterior indecades. Association of catechol-Otive lumbar spinal stenosis: short-term and long-term results. Surgery for lumbar degentension band system in grade 1 degenerative lumbar spondyloerative spondylolisthesis in Spine Patient Outcomes Research listhesis. Clinical Prevalence, severity, and impact of foraminal and canal stenosis outcome of nonoperative treatment for lumbar spinal stenosis, among adults with degenerative scoliosis. Health-related quality of life: a comparison of fusion between patients with isthmic spondylolisthesis and outcomes afer lumbar fusion for degenerative spondylolisthesis those with degenerative disc disease using pedicle screw instruwith large joint replacement surgery and population norms. Two-year clinical this clinical guideline should not be construed as including all proper methods of care or excluding or other acceptable methods of care reasonably directed to obtaining the same results. Disc height reduction psoas approach for the treatment of degenerative lumbar condiin adjacent segments and clinical outcome 10 years afer lumbar tions. Retrolisdoscopic decompressive laminotomy for degenerative lumbar thesis and lumbar disc herniation: a preoperative assessment of spinal stenosis. Long-term durability of back pain: the performance of prognostic tests to select patients minimal invasive posterior transforaminal lumbar interbody fufor lumbar spinal fusion. Due to the paucity of evidence, a recommendation cannot be made regarding the effect of postsurgical rehabilitation the outcomes of patients undergoing surgical treatment for degenerative lumbar spondylolisthesis. Repeat upright posiThe work group recommends the undertaking of observational tional magnetic resonance imaging for diagnosis of disorders underlying chronic noncancer lumbar pain. J Manipulative studies to evaluate the efect of various postsurgical rehabilitaPhysiol Ter. Surgical versus nonundergoing surgical treatment for lumbar degenerative disc surgical treatment for lumbar degenerative spondylolisthesis. Surgical compared tive randomised study on the long-term efect of lumbar fusion with nonoperative treatment for lumbar degenerative sponon adjacent disc degeneration. The utility of repeated postoperative radiographs afer lumlumbar spondylolisthesis by decompression and instrumented bar instrumented fusion for degenerative lumbar spine. Value of Spine Care New Guideline Question: What is the cost-effectiveness of the surgical treatment of degenerative lumbar spondylolisthesis compared to medical/ interventional treatment (consider with and without fusion separately)? Due to the paucity of evidence, a recommendation cannot be made regarding the costeffectiveness of surgical treatment compared to medical/interventional treatment for the management of patients with degenerative lumbar spondylolisthesis. A prospective The work group recommends the undertaking of cost-analysis randomized study of unilateral versus bilateral instrumented posterolateral lumbar fusion in degenerative spondylolisthesis. National complication rates undergoing treatment for degenerative lumbar spondylolistheand disposition afer posterior lumbar fusion for acquired sponsis. Lumbar laminectomy alone or Bibliography with instrumented or noninstrumented arthrodesis in degenera1. Patient selection, costs, and surgical tive efectiveness of minimally invasive versus open transforamioutcomes. Role of lumbar interspinous dispatients with degenerative spondylolisthesis and spinal stenosis. Unilateral versus bilateral instrumentment in pain, disability, and health state associated with costed posterolateral lumbar fusion in degenerative spondylolisthesis: efectiveness: introduction of the concept of minimum cost-efecA randomized controlled trial. Circumferential fusion is dominant over posterotive costs and outcomes in patients with and without workers lateral fusion in a long-term perspective: cost-utility evaluation compensation claims treated with minimally invasive or open of a randomized controlled trial in severe, chronic low back pain. New Guideline Question: What is the cost-effectiveness of minimal accessbased surgical treatments of degenerative lumbar spondylolisthesis compared to traditional open surgical treatments? There is insuffcient evidence to make a recommendation for or against the cost-effectiveness of minimal access-based surgical treatments compared to traditional open surgical treatments for degenerative lumbar spondylolisthesis. The total two year mean costs were and 2-year postoperative pain, disability and quality of life. In critique, The authors suggest that for a specifc subpopulation of degenthis study may have been too small to show a diference. Role of lumbar interspiKim et al3 conducted a comparative cost-efectiveness study nous distraction on the neural elements. Prospective cohort analysis of disabillolisthesis: A randomized controlled trial.
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