X. Hassan. Sonoma State University.
A representative case (case 2) that had no OA changes 27 years after operation order kamagra 100mg without a prescription. A representative case (case 3) that had no OA changes 26 years after operation discount kamagra 50 mg with amex. Cases operated on at an early stage are apt to experience good prognosis. Stage at operation is another important factor to inﬂuence the clinical outcome. When osteotomy is carried out at an early stage and prevents progression of collapse, this could prevent disease dete- rioration or maintain hip function without clinical symptoms even more than 25 years after operation. Experience of Osteotomy in Kyushu University Between 1980 and 1988 Previously, we examined 125 cases that had undergone operations between 1980 and 1988. Twenty-eight hips had collapse progression more than 10 years after opera- tion. We found that the postoperative intact ratio in the nonprogression group was signiﬁcantly larger than that in the progression group. A minimum postoperative intact ratio to prevent collapse progression over a 10-year period was 34% (Fig. According to that study, the aim of osteotomy is to achieve more than 34% of the Long-Term Experience of Osteotomy for Femoral Head Osteonecrosis 85 Fig. Kaplan–Meier survival curve of groups with a postoperative intact ratio of more than 34% and with a ratio less than 34%. A Current Representative Case Sugioka has reported good clinical outcome of osteotomy for ONFH. However, there are many reports that show poor clinical outcome, especially as concerns rotational osteotomy [6–8]. The most important issue about osteotomy treatment may be whether osteotomy could be carried out successfully by others than Sugioka. In our department, osteotomy treatment has been carried out according to the principles based on our long experience. A current representative case is shown, a 33-year-old woman who had bilateral steroid-induced osteonecrosis. Radiographs and magnetic resonance imaging (MRI) show a wide osteonecrosis area, and the intact area was limited to the posterior surface of the femoral head (Fig. According to the preoperative planning, ARO with 20° varus position was expected to result in more than 34% of the ratio of the intact articular in both the joints. The osteotomy was carried out in the right hip joint, and then in the left hip 2 months after the ﬁrst operation. Four years after operations, collapse has not progressed in either of the hip joints, and no OA changes are observed in the postoperative radiographs (Fig. She has no problems in walking, squatting, and going up and down the stairs (Fig. Clinical scores of both hip joints are 100 points, and she has returned to work. Preoperative radiographs and magnetic resonance (MR) images of a current representa- tive case. Radiographs of bilat- eral hip joints just after oste- otomy (a) or 4 years after osteotomy (b) Long-Term Experience of Osteotomy for Femoral Head Osteonecrosis 87 Fig. Osteotomy is a promising treatment option for ONFH, especially for young patients. We believe that experienced hip surgeons can perform osteotomy, including ARO, successfully once they understand the indica- tions and techniques. Sugioka Y (1978) Transtrochanteric anterior rotational osteotomy of the femoral head in the treatment of osteonecrosis affecting the hip. Sugioka Y, Hotokebuchi T, Tsutsui H (1992) Transtrochanteric anterior rotational osteotomy for idiopathic and steroid-induced necrosis of the femoral head.
None of these limitations is prohibitive buy generic kamagra 100mg online, Secondly discount kamagra 100mg fast delivery, OSCEs rely on task specific checklists, which but they should be considered when assume that the doctor-patient interaction can be described as a selecting an OSCE as an assessment tool and when making inferences from OSCE list of actions. As a result, checklists tend to emphasise scores thoroughness, and this may become a less relevant criterion as the clinical experience of candidates increases. Thirdly, there are limits to what can be simulated, and this constrains the nature of the patient problems that can be sampled. Again, this becomes more of an issue as candidates’ level of training and clinical experience increases. Other approaches to skill based assessment Traditional approaches The oral examination (also known as the “viva”) and the “long case” have long been used for assessing clinical competence. The oral examination is traditionally an unstructured face to face session with the examiners. This allows them to explore the trainee’s understanding of topics deemed relevant to clinical practice. The long case is patient based, but the interaction with the patient is usually not observed. Instead, trainees summarise the patient problem for the examiners and respond to examiners’ questions about findings, diagnosis or management, and other topics deemed relevant by examiners. The strength of the long case is the validity that comes from the complexities of a complete encounter with a real patient. However, the difficulty and relevance of these assessments varies greatly as the content is limited to one or two patient problems (selected from the available patients), and decisions are made according to unknown criteria, as examiners make holistic judgments. For this reason traditional unstructured orals and long cases have largely been discontinued in North America. Alternative formats Alternative formats tackle the problems associated with traditional orals and long cases by (a) having examiners observe the candidate’s complete interaction with the patient, (b) training examiners to a structured assessment process, and/or (c) increasing the number of patient problems. For a short case assessment, for example, one or two examiners may direct a trainee through a series of five or six encounters with real patients. They observe, ask questions, and make a judgment based on the candidate’s performance with all the patients. Similarly, a structured oral examination is still a face to face session with examiners, but guidelines for the topics to be covered are provided. Alternatively, a series of patient scenarios and agreed questions may be used so that the content and difficulty of the assessment is standardised across the trainees. An alternative way to assess skills is to observe candidates’ interaction with Each of these adaptations is aimed at improving reliability, but patients 34 Skill based assessment the most important improvement comes from greatly increasing the number of patient problems, which may well Factors leading to lower reliability cause an impractical increased testing time. The more x Administrative problems (such as disorganised staff or noisy rooms) reliable a test, the more likely it is that a similar result will be obtained if the test is readministered. Reliability is sensitive to the length of the test, the station or item discrimination, and the heterogeneity of the cohort of candidates. Standardised patients’ portrayals, patients’ behaviour, examiners’ behaviour, and administrative variables also affect reliability. Questions to ensure validity The validity of a test is a measure of the degree to which the test actually measures what it is supposed to measure. Validity is x Are the patient problems relevant and important to the curriculum? The most basic evidence of validity comes x Have content experts (generalists and specialists) reviewed the from documenting the links between the content of the stations? The validity of a standard depends on the judges’ qualifications and the Judges (n≥12) must first imagine the minimally competent or borderline trainee reasonableness of the procedure they use to set it. When pass-fail decisions are being made, a skill based assessment should be “criterion referenced” (that is, trainees should be For each item in each checklist, judges record what they believe assessed relative to performance standards rather than to each the chances are that their imaginary trainee will be successful other or to a reference group). Although the use of OSCEs for skill based assessment is increasingly widespread, modifying more For each item in each checklist, traditional formats may be appropriate when they are judges revise (or not) their initial predictions combined with other forms of assessment or are used to screen trainees. The success of any skill based assessment depends on finding a suitable balance between validity and reliability and Item score = average of revised judgements Station pass mark = average of the item scores between the ideal and the practical. OSCE pass mark = average of the station pass marks Further reading A modified Angoff procedure for an OSCE x Gorter S, Rethans JJ, Scherpbier A, van der Heijde D, Houben H, van der Linden S, et al.
In recent years it has been rediscovered and popularized by Sculco cheap kamagra 50 mg on-line, Berger purchase kamagra 100 mg, and Dorr [3–5]. Minimally invasive total hip arthroplasty involves a smaller skin incision, usually between half to one quarter the length of a conventional skin incision for this surgery, and attempts to minimize the extent of associated soft tissue trauma. Berger deﬁnes MIS as surgery where “muscles and tendons are not cut”. Recent developments to aid successful MIS surgery have been the introduction of specialized instrumenta- tion, computer-assisted surgery, the utilisation of ﬂuoroscopic guidance, and speciﬁc MIS implants. The success of conventional total hip arthroplasty surgery has relied on adequate exposure to allow visualization of both the acetabulum and proximal femur. This exposure enabled correct orientation of the implanted prostheses based on visualized anatomical landmarks. One of the concerns with minimally invasive techniques are that with a small incision the surgeon would have poor visualization and this could lead to malposition of the prostheses, neurovascular injury, and poor implant ﬁxa- tion, therefore compromising the short- and long-term results of a procedure which has become one of the most successful advances in surgical technology of the twen- tieth century. Minimally invasive total hip arthroplasty has generated a lot of controversy within the orthopaedic community and a great deal of publicity in the popular press. Randomization was to either undergo total hip arthroplasty through a standard 16-cm incision or a short incision of less than 10cm. The authors concluded that minimally invasive total hip arthro- plasty performed through a single-incision posterior approach by a high-volume surgeon, with extensive experience in less-invasive approaches, was safe and repro- ducible. The study however showed no signiﬁcant beneﬁt between the groups in terms of the severity of post-operative pain, the use of post-operative analgesic medications, the need for blood transfusion, length of hospital stay, or early functional recovery. Minimally/less-invasive total hip replacement is an umbrella term used to en compass what is actually a “family” of operations. Each of which have advantages and disad- Minimally Invasive Hip Replacement Surgery 185 Fig. Intraoperative photograph shows position of specialized retractors during minimally invasive surgery (MIS) anterior approach vantage (Table 1). This family of less-invasive hip approaches includes anterior, anterolateral, direct lateral, posterior, and two-incision surgical approaches. Anterior Approach Technique A modiﬁed Smith–Peterson approach is used for a MIS anterior technique. It gives excellent visualization of the acetabulum, allowing acetabular preparation and implant inser- tion with relative ease. First, there is a very steep learning curve as it utilizes a less-common approach for arthoplasty surgery. Second, in this approach access to the femoral canal for implantation of the femoral stem is difﬁcult, prompting many surgeons to use a radiolucent fracture table, ﬂuoroscopy, and specialized implants (Fig. No level-one data have been published on the anterior MIS approach to total hip replacement. Two-Incision Approach Technique The two-incision technique was developed by Mears and popularized by Berger [1,4]. This approach utilizes a modiﬁed anterior Smith–Peterson incision, which is approxi- mately 4–6cm, directly over the femoral neck for preparation and implantation of the acetabular component. A separate posterior incision, 3–4cm in length, in line with the femoral canal is required for the femoral canal preparation and stem implantation (Figs. The procedure is aided by ﬂuoroscopy for placement of the skin incisions, guidance of instrument use and for veriﬁcation of prosthesis positioning. Customized instrumentation and illuminated retractors aid successful surgery. Specially devel- oped, non-hemispherical acetabular reamers have been found to be helpful to prepare the acetabulum, and a cup inserter with dogleg handle helps avoid both soft tissue and bone impingement. Newly designed femoral canal reamers are also required for proximal canal preparation. Fully porous coated distally ﬁxed stems are advocated for this approach.
Treatment of Hydrocephalus Associated with a Dandy–Walker Cyst To treat hydrocephalus secondary to a Dandy–Walker cyst discount 100 mg kamagra with visa, a contrast study can be performed to determine if the lateral ventricles communicate with the cyst quality 50mg kamagra. With no communication, at least two shunts are necessary, one to decompress the cyst and Hydrocephalus 35 one to drain the ventricular system. With communication, a single shunt in either the lateral ventricle or the cyst could adequately treat the hydrocephalus, although some centers recommend simply shunting both the cyst and ventricle as the initial treat- ment. A decompressed Dandy–Walker cyst can yield dramatic radiographic results (i. PROGNOSIS The prognosis of pediatric hydrocephalus is dependent more on the underlying brain morphology as well as other factors such as IVH, ventriculitis, and perinatal ische- mia, than on the severity of the hydrocephalus and ventriculomegaly. The 5-year sur- vival rate of children with congenital hydrocephalus is approximately 90%. Normal intellect has been reported to range from 40% to 65%, but obviously varies widely with each speciﬁc etiology. Before the advent of the CT scan, several studies attempted to investigate the prognosis of shunted vs. In 1963, Foltz and Shurtleff performed a 5-year study of 113 hydrocephalic children of whom 65 were shunted early, and 48 were not operated on. They found that shunted children had a signiﬁcantly better survival and a higher percentage had an IQ of at least 75. In 1973, Young and colleagues performed an outcome analysis on a series of 147 shunted hydrocephalic children. They found a correlation between the width of the child’s cerebral mantle and IQ in that the IQ distribution approached a normal pattern when a cerebral mantle width of 2. Since the introduction of CT and MR imaging, there have been several studies investigating the outcomes of hydrocephalus secondary to speciﬁc etiologies. In 1985, Op Heij and colleagues followed children with congenital nonobstructive hydrocephalus and found that IQ was normal ( > 80) in 50% of cases and abnormal ( < 55) in 28%. There was no correlation with head circumference or degree of ventriculomegaly. They concluded that the degree of intellectual impairment had less to do with the severity of the hydrocephalus and more to do with the severity of underlying anomalies in the central nervous system and defects in the cytoarchitecture of the neocortex. Infants with PHH have a signiﬁcantly higher mortality rate when compared with low-birth-weight infants without PHH. The correlation between severity of PHH and neurological disabilities is less clear. Historically, the mortality for infants with Dandy–Walker malformation approached 20–30%. However, in 1990, Bindal and colleagues demonstrated a mor- tality rate of 14% in their series. Lower IQ and neurological developmental delay are seen in children with Dandy–Walker malformations, but they are thought to be related to the associated anomalies in the central nervous system. Symptomatic ven- tricular shunt malfunction should be evaluated, recognized, and treated promptly to avoid undue morbidity. Ventricular shunt infection currently occurs in 1–15% of children who have shunts placed or revised, and the majority of infections 36 Avellino are detected within the ﬁrst 1–6 months after a shunt procedure. The prognosis of pediatric hydrocephalus is dependent primarily on the underlying brain morphology. Morrison Department of Neurology, University of New Mexico, Albuquerque, New Mexico, U. INTRODUCTION Scoliosis is a lateral and rotational curvature of the thoracic and lumbar spine mea- suring greater than 10. The ﬁrst, idiopathic scoliosis, accounts for 80% of cases with a predilection for adolescent females. The second category, neuromuscular scoliosis, describes an acquired deformity that results from neurologic impairment of either a peripheral or central nature. The third category involves those forms with congenital onset or that are attributable to other connec- tive tissue and musculoskeletal disorders. Children with severe neurological impair- ment are at high risk for the development of scoliosis, especially within certain diagnostic groups. For example, 90% of boys with Duchenne muscular dystrophy (DMD) will develop scoliosis.
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