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Query: UMLS:C0030193 (pain)
 261,466 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Right stellate ganglion block (SGB) can increase QT interval, rate-corrected QT interval (QTc), QT dispersion (QTD), rate-corrected QTD (QTcD), and RR interval while left SGB can decrease these intervals in healthy volunteers. No such studies have been conducted in patients with chronic pain, hence this study was designed to investigate the effects of left and right SGB on these variables in chronic shoulder-hand pain patients. In this study, 28 patients with chronic shoulder-hand pain of at least 6 months duration were given right or left SGB depending on the shoulder affected. A 12-lead electrocardiogram (ECG) was recorded before the block, 30 minutes and 60 minutes after the block. PR interval, RR interval, QT interval were recorded in all 12 leads while QTc, QTD, and QTcD were calculated. Right SGB was performed in 21 patients. A significant decrease (P < 0.05) in PR interval and a significant increase (P < 0.05) in RR interval, QT interval, and QTc interval were observed. QTD showed a significant increase (P < 0.05) only at 30 minutes after right SGB. Left SGB was performed in seven patients. A significant decrease (P < 0.05) in QT interval was observed throughout the study period, while QTc showed a significant decrease (P < 0.05) only at 60 minutes after the block. We conclude that right SGB induces significant increase of QT interval, RR interval, QTc interval, QTD, and a significant decrease of PR interval while left SGB produces a significant decrease in QT and QTc intervals in patients with chronic shoulder-hand pain.
Pain Pract 2004 Jun
PMID:Evaluation of PR, RR, QT intervals and QT dispersion following stellate ganglion block in chronic shoulder-hand pain patients. 1716 92

We present a case of a 29-year-old female patient who had presented to us for the management of her chronic right shoulder-hand pain and developed a sinus arrest following a right-sided stellate ganglion block (RSGB). This patient on receiving a diagnostic RSGB via the anterior paratracheal (C6) approach developed sinus arrest followed by apnea and unconsciousness. On institution of resuscitative measures involving tracheal intubation, positive pressure ventilation, cardiac massage, and intravenous atropine, spontaneous cardiac activity recovered in about 3 minutes. Other signs and symptoms resolved fully in a total of 10 minutes. She had persistent postural hypotension lasting for about 24 hours requiring bed rest and was discharged about 36 hours after the procedure, without any adverse sequelae. As the sinus node is supplied by the right-sided sympathetic chain, its blockade probably resulted in unopposed parasympathetic activity leading to asystole. Available evidence of the role of right stellate ganglion in regulation of cardiac electrophysiology and functioning is also discussed.
Pain Pract 2004 Sep
PMID:An unusual complication of sinus arrest following right-sided stellate ganglion block: a case report. 1717 6

Hand exercise is recommended for hand osteoarthritis (OA) management, but few efficacy studies have been published. The purpose of the study was to determine the effects of two years of whole body strength training and gripper exercise on hand strength, pain, and function in adults with radiographic evidence of hand OA. Older adults (N=55; 71.5+/-6.5 years; 80% female) participated in a two-year, three times per week strength training regimen. Bilateral gripper exercise weight (i.e., isotonic grip strength), isometric grip strength, pain, and self-reported hand, and finger function were recorded at baseline and 24 months. Isotonic grip strength increased 1.94 kg (20.14 kg baseline, 22.09 kg follow-up; p<0.0003). Right and left isometric grip increased 3.62 kg (25.83 kg baseline, 29.45 kg follow-up; p<0.002) and 2.95 kg (22.73 kg baseline, 25.65 kg follow-up; p<0.0005), respectively. Hand pain decreased from 4.77 to 2.62 (p<0.006). Hand and finger function scores showed minimal dysfunction at baseline and follow-up. Results suggest strength training safely increases dynamic and static grip strength and reduces pain in older persons with hand OA.
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PMID:The effects of strength training among persons with hand osteoarthritis: a two-year follow-up study. 1765 18

An ischemic hand in a hemodialysis patient is a serious condition. It causes significant pain and discomfort but also can lead to tissue necrosis and the eventual loss of digits and even the entire hand. Although stealing of blood away from the high-resistance forearm arteries into the low-resistance arteriovenous access generally is assumed to be the cause, a great majority of both wrist and elbow accesses demonstrate retrograde flow without any evidence of hand pain or ischemia. Consequently, demonstration of retrograde flow alone does not predict or indicate the existence of distal ischemia. In this context, the term "arterial steal syndrome" is a misnomer to indicate the presence of peripheral ischemia. Recent studies have shown that, in many cases, arterial stenotic lesions cause distal hypoperfusion and result in hand ischemia. In other cases, distal arteriopathy as a result of generalized vascular calcification and diabetes is the culprit. Because any or a combination of the three mechanisms (retrograde flow, stenotic lesions, and distal arteriopathy) can lead to peripheral ischemia, distal hypoperfusion ischemic syndrome is a more appropriate term to denote hand ischemia. Treatment should start with a detailed history and physical examination to help rule out other (nonischemic) causes of hand pain. A complete arteriogram to evaluate the circulation of the extremity from the aortic arch to the palmar arch is essential. The choice of treatment modality and procedure to apply should be based on this evaluation. This report reviews the pathophysiology and presents current strategies to ameliorate distal hypoperfusion ischemic syndrome.
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PMID:Arteriovenous access and hand pain: the distal hypoperfusion ischemic syndrome. 1769 2

De Quervain's disease has been described as an entrapment of the extensor pollicis brevis and abductor pollicis tendons in the first dorsal compartment of the wrist is a common cause of wrist and hand pain. Currently, intrasheath corticosteroid injections have been reported to be successful as well as surgical release of the first dorsal compartment. We report on three female recreational athletes (median age 57 years, pain VAS 7/10) where we found significant neovascularisation of the extensor retinaculum using Power-Doppler sonography, which was not evident among subjects without de Quervain's disease of the wrist. Polidocanol sclerosing therapy (0.25% 1 ml) was performed with consecutive eccentric training (Thera-Band Flex-Bar, 6 x 15 repetitions of the forearm and wrist extensors and flexors daily). Four weeks later two patients had a resolution of their pain levels (DASH 61 vs. 27, p < 0.05) with resolution of the neovascularisation, while one patient underwent surgery despite pain reduction (6 to 2) 3 weeks following sclerosing therapy. Neovascularisation has been found in de Quervain's disease of the wrist using Power Doppler sonography. Combined treatment with Power Doppler controlled sclerosing therapy with consecutive eccentric training led to encouraging pilot results in terms of pain reduction and functional improvement within 1 month of therapy. A prospective randomized controlled trial is warranted to answer the question whether the sclerosing therapy, the eccentric training or the combination of both is beneficial in de Quervain's disease of the wrist.
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PMID:Neovascularisation in de Quervain's disease of the wrist: novel combined therapy using sclerosing therapy with polidocanol and eccentric training of the forearms and wrists-a pilot report. 1851 93

The ability to share the other's feelings, known as empathy, has recently become the focus of social neuroscience studies. We review converging evidence that empathy with, for example, the pain of another person, activates part of the neural pain network of the empathizer, without first hand pain stimulation to the empathizer's body. The amplitude of empathic brain responses is modulated by the intensity of the displayed emotion, the appraisal of the situation, characteristics of the suffering person such as perceived fairness, and features of the empathizer such as gender or previous experience with pain-inflicting situations. Future studies in the field should address inter-individual differences in empathy, development and plasticity of the empathic brain over the life span, and the link between empathy, compassionate motivation, and prosocial behavior.
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PMID:I feel how you feel but not always: the empathic brain and its modulation. 1869 71

The aim of this study was to test the effect of an intensive hand exercise programme in patients with rheumatoid arthritis (RA). Designed as a clinical controlled trial, the first 30 participants received a conservative exercise programme (CEP), while the next 30 received an intensive exercise programme (IEP). Outcomes were assessed at baseline, and after 2 and 14 weeks. Hand strength, measured as grip strength and pinch strength, was the primary outcome variable. Secondary outcomes were joint mobility, hand pain, and functional ability. After two weeks, there were significant differences between the groups in favour of the IEP in pinch strength in the dominant hand (p = 0.01), as well as grip and pinch strength in the non-dominant hand (p = 0.04 and 0.05, respectively). After 14 weeks, there was a significant difference between the two groups in grip strength in the non-dominant hand (p = 0.04), again in favour of the IEP. There was a trend towards increased pain in the CEP group and towards decreased pain in the IEP group, with significant differences between the groups in several measures of pain after 2 and 14 weeks. However, there were few significant differences between the two groups regarding joint mobility and functional ability. The results indicate that, compared with a traditional programme, an intensive hand exercise programme is well tolerated and more effective in improving hand function in patients with RA.
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PMID:Effect of an intensive hand exercise programme in patients with rheumatoid arthritis. 1918 Jul 23

The aim of this study was to investigate whether bilateral widespread pressure hypersensitivity exists in patients with unilateral carpal tunnel syndrome. A total of 20 females with carpal tunnel syndrome (aged 22-60 years), and 20 healthy matched females (aged 21-60 years old) were recruited. Pressure pain thresholds were assessed bilaterally over median, ulnar, and radial nerve trunks, the C5-C6 zygapophyseal joint, the carpal tunnel and the tibialis anterior muscle in a blinded design. The results showed that pressure pain threshold levels were significantly decreased bilaterally over the median, ulnar, and radial nerve trunks, the carpal tunnel, the C5-C6 zygapophyseal joint, and the tibialis anterior muscle in patients with unilateral carpal tunnel syndrome as compared to healthy controls (all, P < 0.001). Pressure pain threshold was negatively correlated to both hand pain intensity and duration of symptoms (all, P < 0.001). Our findings revealed bilateral widespread pressure hypersensitivity in subjects with carpal tunnel syndrome, which suggest that widespread central sensitization is involved in patients with unilateral carpal tunnel syndrome. The generalized decrease in pressure pain thresholds associated with pain intensity and duration of symptoms supports a role of the peripheral drive to initiate and maintain central sensitization. Nevertheless, both central and peripheral sensitization mechanisms are probably involved at the same time in carpal tunnel syndrome.
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PMID:Bilateral widespread mechanical pain sensitivity in carpal tunnel syndrome: evidence of central processing in unilateral neuropathy. 1933 61

The aim of the current study was to evaluate bilaterally warm/cold detection and heat/cold pain thresholds over the hand/wrist in patients with carpal tunnel syndrome (CTS). A total of 25 women with strictly unilateral CTS (mean 42 +/- 10 years), and 20 healthy matched women (mean 41 +/- 8 years) were recruited. Warm/cold detection and heat/cold pain thresholds were assessed bilaterally over the carpal tunnel and the thenar eminence in a blinded design. Self-reported measures included both clinical pain history (intensity, location and area) and Boston Carpal Tunnel Questionnaire. No significant differences between groups for both warm and cold detection thresholds in either carpal tunnel or thenar eminence (P > 0.5) were found. Further, significant differences between groups, but not between sides, for both heat and cold pain thresholds in both the carpal tunnel and thenar eminence were found (all P < 0.001). Heat pain thresholds (P < 0.01) were negatively correlated, whereas cold pain thresholds (P < 0.001) were positively correlated with hand pain intensity and duration of symptoms. Our findings revealed bilateral thermal hyperalgesia (lower heat pain and reduced cold pain thresholds) but not hypoesthesia (normal warm/cold detection thresholds) in patients with strictly unilateral CTS when compared to controls. We suggest that bilateral heat and cold hyperalgesia may reflect impairments in central nociceptive processing in patients with unilateral CTS. The bilateral thermal hyperalgesia associated with pain intensity and duration of pain history supports a role of generalized sensitization mechanisms in the initiation, maintenance and spread of pain in CTS.
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PMID:Bilateral hand/wrist heat and cold hyperalgesia, but not hypoesthesia, in unilateral carpal tunnel syndrome. 1961 71

Epidural motor cortex stimulation (EMCS) is a therapeutic option for chronic, drug-resistant neuropathic pain, but its mechanisms of action remain poorly understood. In two patients with refractory hand pain successfully treated by EMCS, the presence of implanted epidural cervical electrodes for spinal cord stimulation permitted to study the descending volleys generated by EMCS in order to better appraise the neural circuits involved in EMCS effects. Direct and indirect volleys (D- and I-waves) were produced depending on electrode polarity and montage and stimulus intensity. At low-intensity, anodal monopolar EMCS generated D-waves, suggesting direct activation of corticospinal fibers, whereas cathodal EMCS generated I2-waves, suggesting transsynaptic activation of corticospinal tract. The bipolar electrode configuration used in chronic EMCS to produce maximal pain relief generated mostly I3-waves. This result suggests that EMCS induces analgesia by activating top-down controls originating from intracortical horizontal fibers or interneurons but not by stimulating directly the pyramidal tract. The descending volleys elicited by bipolar EMCS are close to those elicited by transcranial magnetic stimulation using a coil with posteroanterior orientation. Different pathways are activated by EMCS according to stimulus intensity and electrode montage and polarity. Special attention should be paid to these parameters when programming EMCS for pain treatment.
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PMID:Descending volleys generated by efficacious epidural motor cortex stimulation in patients with chronic neuropathic pain. 2018 91


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