Mukesh Tripathi

The comparative evaluation of gabapentin and carbamazepine for pain management in Guillain-Barré syndrome patients in the intensive care unit

We evaluated the effects of gabapentin and carbamazepine for pain relief in 36 Guillain-Barré syndrome patients. Patients were randomly assigned to receive gabapentin 300 mg, carbamazepine 100 mg, or matching placebo 3 times a day for 7 days. Fentanyl 2 &mgr;g/kg was used as a supplementary analgesic on patient demand. The pain score was recorded by using a numeric pain rating scale of 0–10, and sedation was recorded with a Ramsay sedation scale of 1–6 before medications were given and then at 6-h intervals throughout the study period. Total daily fentanyl consumption was recorded each day for each patient. The results of the study demonstrated that patients in the gabapentin group had significantly lower (P < 0.05) median numeric pain rating scale scores (3.5, 2.5, 2.0, 2.0, 2.0, 2.0, and 2.0) compared with patients in the placebo group (6.0, 6.0, 6.0, 6.0, 6.0, 6.0, and 6.0) and the carbamazepine group (6.0, 6.0, 5.0, 4.0, 4.0, 3.5, and 3.0). There was no significant difference in fentanyl consumption between the gabapentin and carbamazepine groups on Day 1 (340.1 ± 34.3 &mgr;g and 347.5 ± 38.0 &mgr;g, respectively), but consumption was significantly less in these 2 groups compared with the placebo group (590.4 ± 35.0 &mgr;g) (P < 0.05). For the rest of the study period, there was a significant difference in fentanyl consumption among all treatment groups, and it was minimal in the gabapentin group (P < 0.05). We conclude that gabapentin is more effective than carbamazepine for decreasing pain and fentanyl consumption.

Carbamezapine for pain management in Guillain-Barré syndrome patients in the intensive care unit.

Objective: To evaluate carbamezapine (CBZ) for neuritic pain relief in Guillain‐Barré syndrome (GBS) patients in the intensive care unit (ICU). Design: Prospective, double‐blind, randomly allocated crossover study days. Setting: ICU in a tertiary care university hospital. Participants: Twelve consecutive, conscious adult (22‐54 yrs) patients with GBS during recovery from the muscular weakness and receiving pressure‐support ventilation in the ICU. All patients complained of severe backache and/or leg cramps and tenderness in muscles, and they required opioids for pain relief. Interventions: CBZ (100 mg every 8 hrs) or equivalent placebo was given to nursing staff in coded powder form. Medication was given to patients through a nasogastric feeding tube. The same coded medicine was given for 3 days, and after a 1‐day omission, a second set of coded powder was given for the next 3 days in a randomized, double‐blind, crossover fashion. Pethidine (1 mg·kg−1) was given intravenously in between, if the pain score was >2. Group 1 (n = 6) patients were given a placebo on the first 3 days, followed by CBZ. Group 2 (n = 6) patients were given CBZ on the first 3 days, followed by a placebo. Measurements and Main Results: In these two study periods of different medications, we observed and scored pain (1, no pain; 5, severe pain), sedation (1, alert; 6, asleep, does not respond to verbal command), and total pethidine requirement per day. In group 1 patients, a significant (p < .001) improvement in the sedation score and a low requirement for pethidine was observed 3 days later, when CBZ was started. However, in group 2 patients, a gradual increase in the pethidine requirement and a high sedation score were noteworthy in the later days of placebo medication. Observations were also analyzed for CBZ days vs. placebo days. Overall, the pain score (1.7 ± 0.8) during the CBZ period of both regimens was significantly (p < .001) lower than during the placebo days (3.1 ± 0.9). Significantly higher doses of pethidine (3.7 ± 0.9 mg/kg/day) were used on the placebo days than on the CBZ days (1.7 ± 1.0 mg/kg/day). Conclusion: The pain in GBS has a dual origin, and we recommend CBZ as an adjuvant to treat pain in GBS patients, during the recovery phase in the ICU, to reduce the narcotic requirement.

Paraplegia After Intracord Injection During Attempted Epidural Steroid Injection in an Awake-Patient

UNLABELLED Epidural steroid injection is recommended in patients with back ache from spinal and radicular pain or pain suggestive of radiculopathy. During needle placement and injections, clinicians often rely on the patients complaint of paresthesia or shooting pain along the nerve root, dura, or cord in case a needle pierces these areas. We report the accidental intracord injection of steroid solution during epidural block using fluoroscopy in a conscious patient, which caused paraplegia. This case suggests failure of undue reliance on a patient reporting pain in the vicinity of needle puncturing the spinal cord structures. IMPLICATIONS Intracord injection of triamcinolone acetate and local anesthetic, resulting in permanent paraplegia, may occur in conscious patients.

Treatment-Induced Plasticity in Cerebral Palsy: A Diffusion Tensor Imaging Study

Diffusion tensor imaging is used as a measure of white-matter organization to probe mechanisms underlying clinical responses. Diffusion tensor imaging and clinical assessment in 8 patients with spastic quadriparesis (mean age, 6.13 years) was performed before and 6 months after therapy (botulinum injection, followed by physiotherapy). All patients were graded on the basis of gross motor function. Serial diffusion tensor imaging was also performed on 10 age/sex-matched controls at baseline and after 6 months. Regions of interests were placed on corticospinal tracts at different levels (i.e., corona radiata, posterior limb of internal capsule, midbrain, pons, and upper medulla) and on other major white-matter tracts, in both patients and controls. A significant increase in fractional anisotropy was evident in corticospinal tracts at the level of the posterior limb of the internal capsule and periventricular white matter of the temporal lobe, relative to baseline values in the patient group. Gross motor function classification system grades improved in all patients during follow-up relative to baseline values. The increase in fractional anisotropy in corticospinal tracts, along with improved clinical motor scores, suggests plasticity of the central motor pathway after combined therapy.

Direction of the J-Tip of the Guidewire, in Seldinger Technique, Is a Significant Factor in Misplacement of Subclavian Vein Catheter: A Randomized, Controlled Study

Misplacement of central venous catheters, predisposing to poor functioning including inability to aspirate blood, is common with the subclavian approach. In this prospective study we sought to determine whether the direction of the guidewire J-tip influenced the catheter tip placement during right subclavian catheterization. In this randomized, double-blind clinical study, we observed the placement of catheters via the right subclavian vein while keeping the J-tip directed either caudad in Group 1 (n = 147) or cephalad in Group 2 (n = 148) patients. The majority of catheters (97% and 57%) in Groups 1 and 2 respectively entered the superior vena cava/right atrium (P < 0.05). The incidence of catheter misplacement into the ipsilateral internal jugular vein was 2% and 40% in Groups 1 and 2, respectively (P = < 0.01). Subsequent experimental study confirmed that the direction of the J-tip was retained inside a model of vascular tubes and its tip led the guidewire into the tubing on the same side even at the acute angulation formed between tubings representing the subclavian, internal jugular, and superior vena cava junction complex. The authors conclude that the simple measure of keeping the guidewire J-tip directed caudad increased correct placement of central venous catheters towards the right atrium during right subclavian catheterization.

Neurocysticercosis in patients with active epilepsy from the pig farming community of Lucknow district, north India

Epilepsy is a major health problem worldwide, and neurocysticercosis (NCC) is one of the important causes of epilepsy in the tropics. The present study was carried out in a rural pig farming community of north India to estimate the prevalence of NCC in patients with active epilepsy (AE) and to determine the associated risk factors. Based on 30-cluster sampling recommended by WHO, a total of 1640 individuals belonging to 294 families from 30 villages were enrolled in the study. Demographic and socio-economic details of all individuals and families were recorded. Individuals with AE were identified by door-to-door survey. NCC was diagnosed by clinical, immunological, neuroimaging (brain magnetic resonance imaging) and epidemiological criteria. During the survey, 95 (5.8%) patients with AE were identified and clinically confirmed; 91 agreed to further evaluation for NCC and 44 (48.3%) of them fulfilled either definitive or probable diagnostic criteria for NCC. These 44 patients belonged to 37 households. Epilepsy in the family and no separate place for keeping pigs were identified as risk factors for NCC clustering in a family. The study shows a very high prevalence of AE in the pig farming community and NCC as its major cause. Since NCC is a preventable and potentially eradicable disease, appropriate intervention strategies may help to reduce the disease burden.

Efficacy of Ondansetron in Prophylaxis of Postoperative Nausea and Vomiting in Patients Following Infratentorial Surgery: A Placebo-controlled Prospective Double-blind Study

In a prospective double blind placebo-controlled study, 45 patients scheduled for infratentorial surgery were randomly allocated into two groups. Five patients were later excluded from the study because of various reasons. Out of 40 analyzable patients, 20 received IV Ondansetron (4 mg), whereas the other 20 received the matching placebo approximately 1 hour before the skin closure. After conclusion of surgery and tracheal extubation, all patients were monitored in the recovery room for post operative nausea and vomiting (PONV) for 48 hours. The incidence of PONV within the first 24 hours was found to be 50% and 10% in the placebo and ondansetron groups, respectively (p<0.05). After 24 hours, however, both groups were comparable in relation to the incidence of emesis. Rescue antiemetic (RAE) was required in nine (45%) patients in the placebo group and in two (10%) patients in the Ondansetron group (p<0.05). A significantly higher number of patients remained sedated postoperatively in the Ondansetron group than in the placebo group (p<0.05). One patient in the Ondansetron group had protracted diarrhea for 48 hours postoperatively. These results indicate that administration of IV Ondansetron (4 mg) 1 hour before skin closure effectively reduces PONV after infratentorial surgery, and does not have significant adverse effects.

What triggers seizures in neurocysticercosis? A MRI-based study in pig farming community from a district of North India.

Colloidal and calcified cysts are considered responsible for seizure in neurocysticercosis (NCC); however, calcified cysts have also been reported in asymptomatic individuals. We carried out a MRI-based study in a rural pig farming community of North India to detect the various stages, locations and numbers of the cyst in asymptomatic individuals and compared them with symptomatic NCC cases to see its association with occurrence of seizures. A total of 107 asymptomatic family members of 29 symptomatic NCC confirmed cases were evaluated clinically, immunologically and by neuroimaging for NCC. MRI-based staging of the parasite was done in both groups, and compared to look for the differences, if any. Thirty-one (29.0%) asymptomatic family members of symptomatic cases were diagnosed to have NCC. There was no difference in proportion of colloidal/degenerating and calcified stages of the parasite between symptomatic and asymptomatic groups; however, significantly higher proportion of the asymptomatic populations had vesicular stage of the parasite (P=0.029). Our findings show that a large number of individuals harboring different stages of cysticerci in their brain remain symptoms free and question the belief that the degenerating/calcified stages of the parasite are primarily responsible for seizure occurrence in NCC.

High Incidence of Tracheomalacia in Longstanding Goiters: Experience from an Endemic Goiter Region

BackgroundOur institute caters to a large number of patients with large, longstanding multinodular goiters; tracheal deviation and resulting airway problems like tracheomalacia are relatively common. However, the literature is sparse on the criteria of early diagnosis and optimum management of tracheomalacia, which our study highlights.MethodsThis retrospective study analyzed 900 thyroidectomies carried out during 1990–2005 for which data from 28 patients treated for tracheomalacia after thyroidectomy were available for analysis. Criteria for making a diagnosis of tracheomalacia after thyroidectomy included one or more of the following: normal vocal cord mobility, absence of glottic or subglottic edema or hematoma, soft and floppy trachea on palpation, obstruction to spontaneous respiration on gradual withdrawal of the endotracheal tube.ResultsMean duration of thyroid enlargement was 13.75 years. Only 7 patients had a history of stridor. Tracheostomy was performed in 26 patients, and 2 patients were put on prolonged intubation. Tracheostomy was performed in 18 patients on the operating table, and 8 in the recovery room. The mean weight of the gland was 442 g and histopathology revealed that 11 cases were benign goiter. The tracheostomy tube was removed after an average of 8.5 days. There were no cases of tracheal stenosis on long-term follow-up.ConclusionsPatients with longstanding goiter, even when benign, are more prone to develop tracheomalacia. On the basis of our experience we strongly advocate tracheostomy intraoperatively if the trachea is soft and floppy and/or collapse of the trachea is observed following gradual withdrawal of the endotracheal tube.

Correlative MR imaging and histopathology in porcine neurocysticercosis

To examine whether all the histopathologically seen features of cysticercus cysts excised from brain of swine naturally infected with neurocysticercosis during its evolution are actually visible on magnetic resonance imaging (MRI).