By O. Cruz. New Mexico Highlands University. 2018.
The task is easier in more obese patients and can be very difficult in cachectic cancer patients buy avanafil 100mg mastercard. The patient is positioned on the operating table in the lateral decu- bitis position purchase avanafil 100mg with amex, with the implantation side upward. At this stage C-arm fluoroscopy may be necessary if a new intrathecal catheter is to be placed. The instrument is positioned to allow an anterior–posterior view for an easy lumbar puncture and identification of the catheter tip level. A 5 cm incision is made in the skin, down to the lumbar fascia, and then the catheter is implanted through a paraspinous approach. A good flow of spinal fluid is documented, the catheter is clamped to the drape to prevent CSF loss, and the incision is packed with an antibi- otic-soaked sponge. If the existing catheter is to be used as the permanent delivery catheter, the patient is positioned on the operating table in the decu- bitis position with the implant side upward and the exiting screening extension catheter downward. The previous back incision is reopened and the disposable extension catheter is disconnected from the permanent in- trathecal catheter and pulled from under the patient by the circulating nurse. The intrathecal catheter is then clamped to prevent CSF loss, and the implantation proceeds in the usual manner. Attention is then turned to the lower quadrant of the abdomen, where a 10 cm incision is made down to the underlying subcutaneous fat layer. A subcutaneous pocket large enough to admit the particular pump be- ing used is then fashioned. Generally, if all four fingers can be admitted to the metacarpal phalangeal joints in the pocket, it is large enough. The upper side of the incision is undermined roughly as the width of the pump, or about 2. The eccentric location of the pocket allows the pump to be placed so that the refill port is clear of the incisional scar and easier to locate. An ideal pocket is one that will allow placement of the pump without difficulty but is tight enough to aid in preventing pump rotation. In fashioning the pocket, metic- ulous hemostasis is important to avoid a postoperative hematoma. The catheter connecting the intrathecal catheter to the pump, or the extension catheter, is then tunneled from the pump pocket to the back incision by means of a malleable tunneling device. Shunt tunneling tools may also be 284 Chapter 15 Implanted Drug Delivery Systems used, and a tunneling system is provided with the programmable pump, which works well. Most constant flow rate pumps come with the extension catheter connected to the pump at the factory; the catheter must be attached to the programmable pump. A connection is now made between the extension catheter and the intrathecal catheter, using a titanium or plastic male-to-male tubing connector, usually provided with the catheter selected. This construct is covered by some type of anchoring device, which is secured to the connector with 2-0 nonabsorbable braided tie. The construct is an- chored to the underlying muscle fascia in a figure 8 fashion. The extension catheter is now connected to the previously prepped programmable pump and secured to the pump with a 2-0 braided tie. Pumps with a previously attached catheter must be placed into the pocket at the time of catheter tunneling. The Synchromed pump in its Dacron pouch may be placed without need for further suturing. Some pumps without this pouch have anchoring loops manufactured around the pump circumference, but their use may be problematic. At least two stitches are necessary to prevent rotation, and three may be necessary to prevent flipping (it happens! This usually requires a dermal or fascial stitch, with the risk that the anchor will be painful. If this technique is used, the stitches should be placed into the pocket first, then through the pump suture loops, whereupon the pump is placed into the pocket and the sutures tied.
How- ever avanafil 200mg line, she outwardly denied the conﬂict that her husband’s unemployment had produced in accordance with the family’s tendency of emotional sup- pression discount 200 mg avanafil free shipping. Family Therapy Directives where a winter tree is surrounded by a brooding skyline. The heavy line pressure throughout her form items suggests an inner tension, while the ag- gressive shading found at the bottom right of Figure 7. Addi- tionally, the tree, often viewed as a symbol of the self in relation to the en- vironment (Buck, 1966), has been rendered with exposed branches and a trauma scar. Therefore, the drawing taken as a whole may correspond to feelings of depressive apprehension from Mrs. Harrison’s inability to manage life’s vi- cissitudes without the comfort of past introjects. Thus, we may view her turning away from the individual needs of others as a defensive reaction against the manifestation of her own internal dependency needs, since her old patterns of coping and the conﬁdence she usually receives from others have been disrupted by the uncertainty of recent events. Just beneath his mother’s renderings, Larry has illustrated a destructive and fearful landscape where a vulnerable swimmer is confronted by not one but two hazards (Figure 7. This primitive scene, reminiscent of an- nihilation fears with its two menacing predators, calls to mind a panic that produces a duality of affect. More- over, only the electric eel with its intrinsic defensive protection appears undisturbed as it resides blithely in the quagmire of the unconscious. For Larry, the acknowledgment of the self as defenseless and defeated, as it is depicted pictorially, is a wholly unacceptable feeling. In this fashion, his defensive attitude in life may reside within the intrapsychic dynamics found in fear. As Kast (1989) has stated, "the emotion inherent to the vic- tim is fear, and fear easily turns into aggression. Accordingly, rather than being at odds with his identity, Larry projected reproach for defensive purposes. In an ef- fort to maintain a sense of self, he placed his feelings of frustration, anger, and anxiety squarely on the shoulders of his father. Further completing the picture of the impassive "bad object," to the right of Larry’s predator is a submarine drawn by Mr. In this drawing a prominent periscope monitors the chaos from be- hind safe conﬁnes, yet it provides little protection or aid for Larry’s de- fenseless self. Harrison’s submarine Jeffrey has rendered heavily shaded clouds, patterned ﬂames, and a driving downpour, which he termed "acid 292 Two’s Company, Three’s a Crowd? Not unlike his own tem- perament, Jeffrey’s aggression was superﬁcially disguised as his infantile at- tachments clashed with a desire for differentiation of the self from his fam- ily. Separated and emboldened, it embodies the interest that provided Jeffrey with necessary feelings of competency and enjoyment. His hacky sack prowess earned accolades from his peers; this individual pursuit was alto- gether his. His drawings in total comprise the sun reﬂected onto the water, the ocean’s edge, and a scrutinizing submarine monitoring the commotion from a well-defended position. As an observer, who not unlike his wife cre- ated a boundary around Larry’s primitive ocean, he exhibits defensive func- tioning, which is observable when we look at his form items as representa- tions of intrapsychic processes. Harrison’s ongoing unemployment was kept as a shameful secret, the guilt and pain causing him to don a well-defended suit of protective covering—either through a recitation of events that was 293 The Practice of Art Therapy 7. Additionally, the sun is often representative of parental love, a sign of an all-seeing power (Tresidder, 2000), and in Fig- ure 7. The fear and anger found within the son’s rendering are manifested in the opposing tendency of the father’s resistance-intellectualization (Laughlin, 1970) as the need for contemplative mental considerations and emotional insulation take precedence over outward expressions of care and support. In the language of symbolism the Harrisons’ mural drawing was less a collaboration, as the title would lead one to expect, than an imbalance: The severed connections signiﬁed the familial relationships and the fam- ily members’ dysfunctional reactions to each other’s behaviors. These meta- phoric images shed light on their defensive functioning, while the visual experience offered permanence for further clariﬁcation. As the family members worked through the avoided emotional con- ﬂicts, the unconscious symbolizing process of the artwork would prove ben- eﬁcial in eliciting perceptions about both themselves and others. The structured exercise of the family mural drawing, and any subsequent ther- apeutic interpretations or metaphors, provides an opportunity to challenge 294 Two’s Company, Three’s a Crowd? Family Therapy Directives individual and family views and creates an empathic and nonthreatening holding environment.
It is important to keep records of your clinical questions purchase 200 mg avanafil free shipping, research results and 2 buy 100mg avanafil overnight delivery. Track down the best critical appraisal of evidence, to follow up patients where you have applied evidence of outcomes the results of your searches and to record and, where appropriate, publish, available. Tis clinical audit of your EBM activities will help you to improve what you are doing and to share your ﬁndings with colleagues. Critically appraise the questions you may need to include in your audit are discussed below. You could revisit the section on formulating answerable questions (EBM Step 1) and look for other strategies, such as teaming up with some colleagues to take this on as a group. If you are generating questions, you need to ask whether your success rate in framing answerable questions is rising. If your success rate is high enough for you to keep asking questions, all is well. If you are becoming discouraged, however, you could talk to your colleagues who are having greater success and try to learn from them or attend some further professional development workshops on EBM. If you are generating and framing answerable questions, you need to ask if you are following them up with searches and whether you have achieved access to searching hardware, sofware and the best evidence for your discipline. You could also run an audit of your questions against the resources you found most useful to ﬁnd answers. Other questions you might like to ask yourself include: • Are you ﬁnding useful evidence from a widening array of sources? If you are having trouble with the eﬀectiveness of your searching, you could consult your nearest health library for further information on how to access and use the available search engines and other resources. You should ask yourself whether you are critically appraising your evidence at all. If so, are you becoming more eﬃcient and accurate at applying critical appraisal guidelines and measures (such as NNTs)? You may be able to ﬁnd this out by comparing your results with those of colleagues who are appraising the same evidence. Finally, you need to ask yourself if you are integrating your critical appraisals with your clinical expertise and applying the results in your clinical practice. Reference: If so, are you becoming more accurate and eﬃcient in adjusting some of the Sackett DL, Strauss SE, critical appraisal measures to ﬁt your individual patients? How to A good way to test your skills in this integration is to see whether you can use practice and teach EBM, Churchill them to explain (and, hopefully, resolve) disputes about management decisions. Te "Clinical Queries" section is a question-focused interface with ﬁlters for identifying the more appropriate studies for questions of therapy, prognosis, diagnosis, and etiology. Checks for: the Merck manual, guidelines, systematic reviews, and PubMed Clinical Queries entries. Te Cochrane Trials Registry contains over 350,000 controlled trials—the best single repository. When accessed from any internet address in these countries, it allows the option ‘log on anonymously’. CINAHL CINAHL is the Cumulative Index to Nursing and Allied Health Literature, and is available through libraries or CKN. Unlike PubMed Clinical Queries, it has no inbuilt ﬁlters but some alternatives for CINAHL are suggested at http://www. BestBETs takes into account the shortcomings of much current evidence, allowing physicians to make the best of what there is. It summarises the current state of knowledge, ignorance and uncertainty about the prevention and treatment of clinical conditions, based on thorough searches and appraisal of the literature. Review: interactive, but not didactic, continuing medical Summary of a systematic education is eﬀective in changing physician performance. Of studies, syntheses, synopses and systems: the "S" Describes the diﬀerent levels evolution of services for ﬁnding current best evidence.
If you adhere to the teachings of Karl Popper 100 mg avanafil amex, this hypotheticodeductive approach (setting up falsifiable hypotheses which you then proceed to test) is the very essence of the scientific m ethod order avanafil 50 mg visa. Rem em ber, however, that not all research studies (even good ones) are set up to test a single definitive hypothesis. Qualitative research studies, which are as valid and as necessary as the m ore conventional quantitative studies, aim to look at particular issues in a broad, open-ended way in order to generate (or m odify) hypotheses and prioritise areas to investigate. Even quantitative research (which the rest of this book is about) is now seen as m ore than hypothesis testing. Prim ary studies report research first hand, while secondary 42 G ETTIN G YOU R BEARIN G S (or integrative) studies attem pt to sum m arise and draw conclusions from prim ary studies. Prim ary studies, the stuff of m ost published research in m edical journals, usually fall into one of three categories. The m ore com m on types of clinical trials and surveys are discussed in the later sections of this chapter. M ake sure you understand any jargon used in describing the study design (see Box 3. Secondary research is com posed of: • overviews, considered in Chapter 8, which m ay be divided into: (a) (non-systematic) reviews, which sum m arise prim ary studies (b) systematic reviews, which do this according to a rigorous and predefined m ethodology (c) meta-analyses, which integrate the num erical data from m ore than one study • guidelines, considered in Chapter 9, which draw conclusions from prim ary studies about how clinicians should be behaving • decision analyses, which are not discussed in detail in this book but are covered elsewhere;16, 17, 34–36 these use the results of prim ary studies to generate probability trees to be used by both health professionals and patients in m aking choices about clinical m anagem ent or resource allocation • economic analyses, considered in Chapter 10, which use the results of prim ary studies to say whether a particular course of action is a good use of resources. Exam ples of the sorts of questions that can reasonably be answered by different types of prim ary research study are given in 43 H OW TO READ A PAPER Box 3. In this case, results are analysed by com paring groups Paired (or m atched) Subjects receiving different treatm ents are com parison m atched to balance potential confounding variables such as age and sex. Results are analysed in term s of differences between subject pairs W ithin subject Subjects are assessed before and after an com parison intervention and results analysed in term s of within subject changes Single blind Subjects did not know which treatm ent they were receiving D ouble blind N either investigators nor subjects knew who was receiving which treatm ent Crossover Each subject received both the intervention and control treatm ents (in random order) often separated by a washout period of no treatm ent Placebo controlled Control subjects receive a placebo (inactive pill), which should look and taste the sam e as the active pill. Placebo (sham ) operations m ay also be used in trials of surgery Factorial design A study that perm its investigation of the effects (both separately and com bined) of m ore than one independent variable on a given outcom e (for exam ple, a 2 x 2 factorial design tested the effects of placebo, aspirin alone, streptokinase alone or aspirin plus streptokinase in acute heart attack37) 44 G ETTIN G YOU R BEARIN G S the sections which follow. One question which frequently cries out to be asked is this: was a random ised controlled trial (see section 3. Before you jum p to any conclusions, decide what broad field of research the study covers (see Box 3. Then ask whether the right type of study was done to address a question in this field. For m ore help on this task (which som e people find difficult until they have got the hang of it) see the Oxford Centre for EBM website38 or the journal article by the sam e group. Therapy – testing the efficacy of drug treatm ents, surgical • procedures, alternative m ethods of patient education or other interventions. Preferred study design is cohort or case-control study, depending on how rare the disease is (see sections 3. Both groups are followed up for a specified tim e period and analysed in term s of specific outcom es defined at the outset of the study (for exam ple, death, heart attack, serum cholesterol level, etc). Because, on average, the groups are identical apart from the intervention, any differences in outcom e are, in theory, attributable to the intervention. Som e papers which report trials com paring an intervention with a control group are not, in fact, random ised trials at all. The nam e for these is other controlled clinical trials, a term used to describe com parative studies in which subjects were allocated to intervention or control groups in a non-random m anner. This situation m ay arise, for exam ple, when random allocation would be im possible, im practical or unethical. Som e trials count as a sort of halfway house between true random ised trials and non-random ised trials. In these, random isation is not done truly at random (for exam ple, using sequentially num bered sealed envelopes each with a com puter generated random num ber inside) but by som e m ethod which allows the clinician to know which group the patient would be in before he or she makes a definitive decision to randomise the patient. This allows subtle biases to creep in, since the clinician m ight be m ore (or less) likely to enter a particular patient into the trial if he or she believed that the patient would get active treatm ent. In particular, patients with m ore severe disease m ay be subconsciously withheld from the placebo arm of the trial. Exam ples of unacceptable m ethods include random isation by last digit of date of birth (even num bers to group A, etc. The questions which best lend them selves to the RCT design are all about interventions, and are m ainly concerned with therapy or prevention. It should be rem em bered, however, that even when we are looking at therapeutic interventions, and especially when we are 47 H OW TO READ A PAPER not, there are a num ber of im portant disadvantages associated with random ised trials (see Box 3. There are, in addition, m any situations in which RCTs are either unnecessary, im practical or inappropriate.
We use the stellate ganglion block to diagnose sympathetically mediated pain of the upper thorax effective 50 mg avanafil, arm 100mg avanafil for sale, head, or face and to treat postherpetic neuralgia, sympathetically maintained pain, or vaso- occlusive disease. Celiac plexus blocks indicate whether pain is arising from the ab- dominal viscera and relieve pain caused by upper abdominal malig- nancies, including pancreatic cancer. A positive response to a celiac plexus diagnostic block is prognostic of several months of pain relief from celiac plexus neurolysis. Lumbar sympathetic ganglion blocks allow us to diagnose sympa- thetically mediated pain of the lower extremities. Superior hypogastric plexus blocks uncover any visceral cause of pelvic pain, and ganglion im- par blocks shed light on the cause of perineal (rectal, anal, vaginal) pain. The patient’s response to a nerve block helps us diagnose cervical or lumbar facet joint syndrome. Pain arising from the C2-C3 facet joints generally radiates to the occiput and that arising from C5-C6 radiates to the shoulder. We can reproduce this pain with ipsilateral rotation and extension of the cervical spine. Lumbar facet joint syndrome causes constant pain in the lumbar region that may radiate to the hips or even below the knee and can be elicited by hyperextending the spine ipsi- laterally. Facet joint syndrome is difficult to diagnose because it arises from the same types of degenerative change that show up in x-ray images of asymptomatic joints. The diagnosis is further obfuscated because similar symptoms can arise from discopathy, nerve root impingement, and/or myofascial disease. We can differentiate facet joint syndrome by the response to radiographically guided injections of local anes- thetics into the zygapophyseal joints or around the dorsal medial branches of the posterior primary rami. Central Nerve Blocks To determine whether a sensory nerve root is generating pain, we block central nerves by injecting local anesthetic under fluoroscopic guidance 46 Chapter 3 Patient Evaluation and Criteria for Procedure Selection into the epidural space or onto selected dorsal roots. The use of a con- trast medium helps ensure proper needle placement and spread of the local anesthetic. If the block results in pain relief, we presume that the pain generator is distal to the anesthetized site. If the block results in numbness but no pain relief, we presume the pain generator is proxi- mal or collateral to the anesthetized site. Differential epidural blocks can reveal whether pain is arising from the somatic nerves, the sympathetic nervous system, or the central ner- vous system. If the placebo relief is long lasting, it is possible that the pain is centrally main- tained or psychogenic. If the placebo provides no pain relief, we ad- minister three injections of successively higher concentrations of local anesthetic. If the lowest concentration of anesthetic provides pain relief, we consider the pain to be sympathetically maintained. If the next level of anesthetic provides relief, we presume that the pain is somatosensory. If the pain persists, we inject the highest concentration, which usually causes a temporary loss of motor function. If this fails to provide relief, we presume the pain is centrally maintained or psychogenic. Psychological Evaluation Pain is, by definition, a sensory and emotional experience of actual or perceived tissue damage. The challenge for the pain practitioner is to differentiate between the component that is biologi- cally driven and the component that is magnified by emotions. This evaluation is an important part of a medical approach to their pain and is essential before they receive interventional therapies. Medical Therapies 47 Patients with major depressed mood, anxiety, or other negative af- fective states report more pain with noxious stimuli than do controls with positive affective states. We believe that emotionally depressed patients can be appropriate candidates for interventional therapies; it is simply necessary to be especially careful when offering them thera- pies that carry significant risks. While it may be obvious that patients with severe pain caused by a peripheral pain generator will also ex- perience depression or anxiety, it is less obvious that the same nega- tive affective states actually increase the experience of pain itself. De- pressed affective states can also maintain pain and cause it to take on a life of its own by dramatically amplifying what would otherwise be a relatively minor pain generator.
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