By H. Sulfock. Concord College. 2018.
Both procedures have a similar duration of action of at least 6 hours cafergot 100mg otc. No difference in the number of patients without pain for 4 h or in those requiring analgesics by 24 h has been reported compared to caudal block (Fisher 1993) discount 100 mg cafergot with visa. Inguinal Surgery in Children | 73 undergoing herniotomy, orchidopexy or ligation of patent processus vaginalis, show no statistically significant differences between IIB and caudal analgesia (Markham 1986). Patients with caudal anesthesia have prolonged discharge times when compared to patients who receive IIB (Splinter 1995). Earlier micturition and less complications in the IIB group is an important advantage over the caudal block (Markham 1986). Caudal epidural blocks may be more effective than IIB plus LIA in controlling pain after herniorrhaphy with laparoscopy and result in earlier discharge to home (Tobias 1995). Pain control with caudal blocks can be improved by increasing the concentration of local anesthetic. This will increase the incidence of adverse effects. The adverse effects associated with caudal blocks may be urinary retention, delayed ambulation and accidental subarachnoid or intravascular injection. However, IIB may also be associated with serious complications, especially in children. The risk of complications is certainly greater in neonates and infants. Orchidopexy is a procedure usually performed in children through an inguinal incision similar to that of the inguinal herniorrhaphy, but it involves more testicular and spermatic cord traction. It must be remembered that testicular innervation can be traced up to T10 and from the aortic and renal sympathetic plexus (Kaabachi 2005). Moreover innervation of spermatic cord by the gGFN should be taken into account. For these reasons, the IIB alone is unable to prevent either the painful stimulation from traction of the spermatic cord or manipulation of the testis and peritoneum (Jagannathan 2009). In a study, an ultrasound-guided IIB added to a caudal block decreased the severity of pain in inguinal hernia repair, 74 | Ultrasound Blocks for the Anterior Abdominal Wall hydrocelectomy, orchiectomy and orchidopexy, but these data and the time to first rescue analgesic were significant only in inguinal hernia repair patients (Jagannathan 2009). The addition of a spermatic cord block to an IIB may reduce analgesic requirements in orchidopexy (Blatt 2007). Percutaneous IIB + gGFB in children undergoing inguinal herniorraphy resulted in lower pain scores for 8 hours and lower analgesic requirements (Hinkle 1987). Conflicting results have been shown by a study in which the benefit of the additional gGFB to IIB was limited only to the time of sac traction without any postoperative effect (Sasaoka 2005). Obstetric and Gynecologic Surgery Zhirajr Mokini Anterior abdominal wall blocks have been evaluated in gynecologic and obstetric surgery. The Pfannenstiel section for open gynecologic and obstetric surgery affects the groin territory innervated by IIH and IIN. Obviously, a bilateral block is required in these types of surgery. Multimodal analgesia with anterior abdominal wall regional blocks applied to laparoscopic or open intra-abdominal surgery seem to be particularly useful in reducing postoperative opioid requirements (Bamigboye 2009). A recent survey among obstetric anesthesiologists in the United Kingdom showed that 21. It is important however to provide patients with adequate analgesia in relation to the surgical procedure because blocks cannot offer visceral pain control. Objective evaluation in terms of pain reduction may be difficult because the visceral component of postoperative pain may be subjectively described as moderate to severe. This is why many studies report significant reduction in opioid requirements without significant differences in pain scores. Visceral pain can be effectively relieved with neuraxial or systemic opioid administration, but at the price of uncomfortable side effects (Kanazi 2010). Overall, the quality of postoperative analgesia was improved compared to placebo with reduced pain reports, an increased time for first rescue analgesic and reduced opioid need. Pain scores and analgesic requirements may be reduced for the first 24 hours (Ganta 1994, Belavy 2009). These results suggest that the IIB should be always performed after cesarean delivery under general anesthesia or spinal anesthesia when neuraxial opioids are not used (Belavy 2009). However, adverse effects related to opioids have been reported to be not reduced by IIB. A recent Cochrane review indicated that women who undergo cesarean section under regional anesthesia with IIB have decreased opioid consumption but no difference in visual analogue pain scores (Bamigboye 2009). The block of the transverse abdominal muscle plexus, in which the IIH and the IIN run, provided better analgesia with reduced opioid request and delayed time to rescue analgesic compared with placebo (McDonnell 2008). More patients have been reported to be able to put the babies to the breast at 8 hours (Kuppuvelumani 1993).
POSSIBLE FAMILIES OF RISK FACTORS LR Disinhibition Axis II Opioids ALDH/ADH Broad markers EEG alpha X X Voltage X X HPA X X X X 5-HT levels X X X DA levels X X X Neuropsychiatric X X Genes/proteins AC X X G protein X X PKC X X NPY X X X 5-HT1A/1B/2C 5-HT3 X 5-HTT X X X TOH X X DRD2 X D4 X DAT X GABAA X X X AC order cafergot 100 mg amex, adenylyl cyclase; ADH cheap 100mg cafergot with amex, alcohol dehydrogenase; ALDH, aldehyde dehydrogenase; DA, dopamine; DAT, dopamine transporter; DRD2, dopamine receptor D2; GABA, γ-aminobutyric acid; HPA, hypothalemic-pituitary-adrenal axis; 5-HT, serotonin; LR, level of response; NPY, neuropeptide Y; PKC, protein kinase C. It is possible that one childhood psychiatric disorder, ADHD, might also A low LR is a useful place to begin to demonstrate how fit into the disinhibition domain, and other investigators some of the literature might be synthesized. Although the might believe that some anxiety disorders might fit here as central aspect of this family of findings might be altered 5- well. HT or HPA axis functioning, it is equally plausible that a A number of neurochemical markers described above low LR to alcohol is the characteristic that pulls together might fit together under a general heading of disinhibition. Dampened responses to alcohol in children of alcohol- ics have been observed for several hormones, electrophysio- well as early-onset and severe alcoholism (6,58). Aspects of logic measures, subjective feelings of intoxication, and 5-HT might also be relevant, with the major finding here motor performance. This array of findings might reflect (as opposed to the LR domain where only the 5-HTT might altered second messenger and intracellular signaling actions contribute) being low 5-HT functioning overall, and genes that are less sensitive to alcohol-induced neurochemical having impact on tryptophan hydroxylase (6,102). Several changes, including genes that affect G proteins, AC, and additional findings that are discussed in more detail in other PKC. Other mechanisms that might independently affect publications might also apply to this domain, including cog- the LR to alcohol might include genes that have impact on nitive difficulties with executive cognitive functioning, NPY, GABA, 5-HT, and DA. The subsequent diminished which might cross over with CD, ASPD, and the substance effect of alcohol on neurons might also function to produce use disorders. Other components of some of these same systems, in- Independent Axis I Major Psychiatric cluding DA, 5-HT, DA, and HPA functioning, are also Disorders as a Potential Domain of Risk likely to function through additional mechanisms as media- tors of several other domains of risk factors. For example, The central hypothesis for this domain is that genes that alternative aspects of these systems might have impact on contribute to the development of some psychiatric disorders disinhibition, independent psychiatric disorders, and opioid might indirectly increase the risk for heavy drinking and system functioning. As discussed further below, most of alcohol-related problems. The axis I disorders most closely those additional attributes are likely to be distinct from tied to an elevated alcoholism risk are schizophrenia and those that relate to a low LR. It is hoped that the identifica- bipolar manic depressive disorder as described above (60, tion of specific genes linked to LR will help pinpoint which 61,64). An enhanced alcoholism risk might also be associ- of these neurochemical systems contribute most to this do- ated with panic disorder and social phobia, and possibly main. Each relevant condi- tion is itself a complex genetic disorder, with separate, but perhaps overlapping, sets of genes. Furthermore, it is possi- A Domain Encompassing Disinhibition, a ble that different environmental events add to or detract Low P3 Amplitude, ASPD, and Early- from the risk for each of these conditions. Onset and More Severe Subtypes of For this discussion, it is not essential to determine if the Alcoholism individual with schizophrenia, for example, is drinking to A low P3 amplitude of the ERP and aspects of CD and/or decrease the symptoms of their underlying and independent ASPD characterize a substantial minority of young children disorder (although this contention is not well supported) of alcoholics; aspects of this domain are genetically influ- (63,131), or if the problems were a result of the combination enced, and these phenomena relate to the future alcoholism of poor judgment, a large amount of free time, and living risk. Although low LR appears to be relatively specific for in a heavy drinking environment. In either case, the search the alcoholism risk (19,24), the disinhibition domain might for genetic factors in alcoholism might be more efficient if enhance the risk for all substance use disorders (41,48,52). Once genetic markers for an addi- judgment and impulsive behavior, which both increase the tional characteristic (such as LR) have been found, they risk for ingesting substances and for problems learning how can be tested in these more complex subjects to determine to control their use. This potential domain appears to operate independently The core characteristics of this domain might only indi- of a low LR and alcohol-metabolizing enzymes, and there rectly relate to independent psychiatric disorders. It is possi- are few data that would link these phenomena to the opioids ble that the predispositions toward both alcoholism and a Chapter 98: Vulnerability Factors for Alcoholism 1407 psychiatric disorder might operate through the same genes ing neurochemical changes might have impact on second that have impact on the 5-HT, DA, or the HPA systems. Or the relationships could reflect transmission disequilib- rium for the genes having impact on the alcoholism risk and those related to some of the psychiatric disorders. The CONCLUDING REMARKS answer to these questions might be more easily addressed once specific genes linked to the alcoholism risk and those During the 7 years since publication of the previous edition, linked to the relevant independent psychiatric disorders there have been exciting developments regarding the study have been identified. Progress in the studies of the genetic factors in alcohol dependence has been important because this is one of the most prevalent major A Possible Domain Related to the Opioid psychiatric conditions, and is associated with substantial System morbidity and mortality. A low level of activity of endogenous opioids could alter Some readers will be most interested in the citations from the intensity of reinforcement from alcohol (93,94). The publications over the prior decade regarding the broad phe- markers reported above, as well as characteristics potentially notypic or more focused genotypic markers described here. It is possi- subsumed under a separate global domain. HPA axis, that findings related to specific neurochemical Thus, it is possible this is not a separate domain of influence, systems might each represent separate domains of influence, but the possibility of a relatively unique impact is worth and that some of the hypothesized domains might be epi- considering. However, as is true of all fields of science, it is The Importance of Alcohol-Metabolizing important to outline possible examples of a generic ap- Enzymes proach, in the hope of stimulating additional research to determine the most appropriate domains of influence. Both the genetic control and the impact on drinking behav- iors for alcohol-metabolizing enzymes have been well estab- lished (18,128). The risk for alcohol dependence among ACKNOWLEDGMENTS individuals with the ALDH2-2, 2-2 genotype is close to zero. ALDH2-2, 2-1 heterozygotes have significantly lower This research was supported by the National Institute on levels of risk as, apparently, do some people who have the Alcohol Abuse and Alcoholism (NIAAA) grants 05526 and more efficient ADH2-2, 2-3, and 3-1 alleles. The mecha- 08403, the Veterans Affairs Research Service, and funds nisms through which the relevant genes are likely to operate provided by the State of California for medical research include an aversive effect of alcohol at high acetaldehyde on alcohol and substance abuse through the University of levels (as seen with ALDH2-2 homozygotes), and possibly California, San Francisco. Despite some crossover with LR for ALDH heterozy- gotes, it is likely that the alleles controlling these alcohol- REFERENCES metabolizing enzymes operate as a relatively separate 1.
Thus buy 100 mg cafergot visa, they said cafergot 100mg sale, the provider side needed to get on with the redesign and present it to the commissioners as a new offer. Although these initiatives were undoubtedly examples of clinically led service redesign, they were often stymied by the lack of a receptive and sufficiently resourced operational commissioning forum to consider them. Conclusions This chapter has analysed the role of clinical leadership in our eight cases in terms of three arenas, concerned with strategic commissioning, operational commissioning and operational service delivery. We have also made a distinction between the leadership work of instigating service redesign and that of implementing new models or concepts of service delivery. In addition, we examined the range of ways that these activities can take place across the three arenas. A number of key points are worth bringing out by way of conclusion to our comparison of the eight cases. First, the leadership work of crafting operational detail is bound up with the operational delivery arena – without leadership work within this arena, operational solidity is unlikely to emerge. However, this institutional work of defining operational detail requires interchange with the operational commissioning arena, so that the staff and other resources or delivery are appropriate and also so that there can be iterative refinement of the overall concept and its ethos. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals 81 provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. CROSS-CASE FINDINGS AND COMPARISONS Second, and perhaps more surprising, the leadership work of envisaging and articulating new service concepts can begin in any of the three arenas and often involves individuals who can move adroitly between them. We saw new service concepts being taken up to the strategic arena by clinicians who were also engaged in committed work in operational arenas, as well as cases where clinicians working mainly in strategic arenas formulated big ideas and found formal and informal ways of shaping powerfully the activities of colleagues in the other two kinds of arena. Above all, our analysis brings out the key role played by operational commissioning arenas for steering service innovation. Arenas such as programme boards appear to offer a forum where clinical leaders in CCG commissioning roles and in provider roles come together to integrate the institutional work of creating new models of service delivery. In order to do this, they can be seen as bringing clinical expertise and experience to bear in reconciling a number of perspectives which are potentially in conflict with one another. These include: l thinking differently about what established clinical professions do, in the context of services designed to address the needs of members of the public in a holistic way; tackling identified public health challenges rather than providing a service as defined by established clinical specialisms l developing new or modified professional identities and skills sets; clinical leaders in commissioning and provider roles became engaged in practical debate about the skills and sense of priorities of particular clinical roles l preserving and enhancing the expertise base of established clinical workforces; in some of our cases, provider clinical leaders took up a key role of working out how the expertise they represented could continue to be useful and relevant in a new service delivery model l identifying where national-level funding schemes offer opportunities or incentives for investments in new models of service; in some cases, the work of making sense of, and capitalising fully on, a plethora of national initiatives and sources of funding demanded a great deal of attention l preserving the income streams of established clinical provider organisations; in a number of cases both commissioners and providers found themselves dealing with complexity around whether or not to continue to support an established provider or advocate it be replaced by something different that might serve public health needs better. Grappling with these tensions involves much more than mediating between a managerial and a clinical perspective, which is one established notion of the work of clinical leadership. Our analysis of the work of programme boards suggests that clinicians and non-clinicians on such boards find themselves mediating between a variety of different managerial perspectives (e. One of the key lessons from our cases is the function of programme boards in providing a kind of adaptive leadership forum where complex dilemmas can be tackled through a process of dialogue, guided by an ethos of commitment to public health. Solutions to such dilemmas need to be discovered rather than imposed. This role of programme boards is particularly significant given the fact that, as we will see in the next chapter, these kinds of arenas do not exist in some health-care systems abroad. Although the original conception of CCGs emphasised the importance of their governing bodies as the place where the clinical voice would direct commissioning strategy, our cases demonstrate that this depends on carefully constructed operational commissioning forums, such as programme boards. In order to achieve this, we saw commissioners in these operational commissioning arenas finding ways to set aside models of market-based commissioning and instead seeking collaboration with providers to establish pilot arrangements for new models of care. These attempts frequently seemed to rely on using non-recurrent funding. One constant leadership task addressed within strategic commissioning areas is the authorisation and vesting of resources in the other two arenas. In some cases, the work of making sense of, and capitalising fully on, a plethora of national initiatives and sources of funding demanded a great deal of attention. The findings make clear that the integration of clinical leadership across the three arenas can be an uneven and lengthy process. This has important implications for the speed of progress in service innovation that policy-makers should expect. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals 83 provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. CCGs are just one example, albeit a very important one, of just such an attempt to enact the expectation, obligation and opportunity. With the launch of the National Improvement and Leadership Development Board in 2016, that general expectation of a diffuse and widespread responsibility for leadership and development has been renewed and intensified. Implicit within this is the related question of whether or not CCGs have provided an appropriate platform for the exercise of clinical leadership.
This is particularly true for oculomotor remove the abnormal signals directed to the thalamus and abnormalities that may directly result from dopamine deple- brainstem buy cheap cafergot 100mg, thus allowing these intact systems to compensate tion in the caudate nucleus (151 proven cafergot 100mg,164). Most per- executive functions) or of the anterior cingulate (apathy, tinently, changes in phasic discharge patterns, and new ana- personality changes), and may be the result of loss of dopa- tomic connections need to be better incorporated into any mine in the dorsolateral or ventral caudate nucleus, respec- new concept of basal ganglia function and a greater empha- tively (65). Besides abnormalities in dopaminergic trans- sis placed on the manner in which thalamic, brainstem, and mission in the striatum, several studies indicate that cortical neurons utilize basal ganglia output. For instance, cerebrospinal fluid levels of the serotonin metabolite 5-hy- REFERENCES droxyindolacetic acid are reduced in depressed parkinsonian 1. Topographical projections of the cerebral cortex patients compared with nondepressed parkinsonian pa- to the subthalamic nucleus. Anatomical and physio- logical evidence for D1and D2 dopamine receptor colocaliza- tive in treating parkinsonian depression (10,67,195). The functional anatomy of ganglia–thalamocortical circuits has also been implicated in basal ganglia disorders. Single-joint rapid joint coordinates of putamen and motor cortex preparatory ac- arm movements in normal subjects and in patients with motor tivity preceding planned limb movements. Physiological mechanisms of London: Blackwell, 1989:55–62. The connections of the medial Neurosci 1990;13:266–271. In: Bernardi G, Carpenter MB, Di Chiara G, et mocortical circuits: parallel substrates for motor, oculomotor, al. New York: Plenum Press, 1989: 'prefrontal' and 'limbic' functions. Amelioration of par- Annu Rev Neurosci 1986;9:357–381. New perspectives in basal forebrain orga- (STN) in MPTP treated green monkeys. Mov Disord 1990; nization of special relevance for neuropsychiatric disorders: the 5(suppl1):79. Neuronal activity in the MPTP model of 1937;60:424–436. Brain tory activity of neurons in pallidal-receiving areas of the monkey dopamine and the syndromes of Parkinson and Huntington. Changes in firing of pallidal neurons Nature Neurosci 2000;3:1301–1306. A quantitative analysis of pallidal J Neurosci 1999;19:599–609. Synaptic integration of func- tionally diverse pallidal information in the entopeduncular nu- Exp Brain Res 1991;86:623–632. Compensatory effects of potentiates NMDA receptor currents in neurons of the subtha- glutamatergic inputs to the substantia nigra pars compacta in lamic nucleus. Involvement of the subtha- lamic nucleus for the alleviation of 1-methyl-4-phenyl-1,2,3,6- lamic nucleus in glutamatergic compensatory mechanisms. Eur tetrahydropyridine (MPTP)-induced parkinsonism in the pri- J Neurosci 1999;11:2167–2170. Hemiparkin- kinsonism due to organophosphate pesticide intoxication: five sonism in monkeys after unilateral internal carotid artery infu- cases. Motor disturbance and brain functional imaging in 22. Thalamotomy for par- induced by high-frequency deep-brain stimulation. Proc Natl Acad Sci USA tions to sensorimotor cortex in the macaque monkey: use of 1983;80:4546–4550. Motor learning in activates the cortical motor system during alleviation of parkin- monkeys (Macaca fascicularis) with lesions in motor thalamus. Role of corticospinal motor projec- in southern Italy. Cerebral potentials related to voluntary actions: par- 51. Interconnec- messenger RNA in rat pallidum: comparison of the effects of tions and organization of pallidal and subthalamic nucleus neu- haloperidol, clozapine and combined haloperidol-scopolamine rons in the monkey. Activity of basal ganglia neurons during move- of thalamocortical activity after posteroventrolateral pallido- ment. Basal ganglia function and ments in basal ganglia disorders.
10 of 10 - Review by H. Sulfock
Votes: 245 votes
Total customer reviews: 245