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Biomedical subjects

J V Campellone

Publications and source records attributed to J V Campellone.

11 recordsLinked to original sources

Age and the severity of carpal tunnel syndrome.

Several studies have shown an increased incidence of Carpal Tunnel Syndrome (CTS) with increasing age, as well as a longer Median sensory latency in older CTS patients. In this study, data was analyzed from 19 patients with bilaterally normal UE EMG/NCS and no symptoms of CTS (38 hands), as well as 18 patients with unilateral CTS and 21 with bilateral CTS (60 hands) to determine the effect of age on the severity of nerve conduction abnormalities associated with CTS. Most of these parameters showed increasing severity with age. Median motor latency rises sharply with age (r = .41, p = .001), and amplitude falls (r = .34, p = .008). Median sensory rises significantly with age in CTS patients (r = .42, p = .001) and amplitude falls (r = .29, p = .022). Furthermore, the (Median-Ulnar) motor and sensory latency differences both rise with age (r = .40, p = .001, and r = .35, p = .004 respectively). This is crucial, for an increase in Median motor or sensory latency with age could represent a similar degree of pathologic slowing superimposed on normally slower conduction with age. However, the sharp rise in the (Median-Ulnar) latency differences (from 2.2 msecs at age 40 to 3.8 msecs at age 70 for motor, and 1.6 msecs to 2.5 msecs for sensory) shows that the compression is more severe with age.

Adult↗

Stupor from lamotrigine toxicity.

PURPOSE: To report that acute lamotrigine poisoning may result in severe encephalopathy. METHODS: A 55-year-old woman became stuporous after overdose with lamotrigine (LTG) and valproic acid (VPA) tablets. Evaluation revealed elevated serum LTG levels and no other etiology for encephalopathy. RESULTS: LTG was withheld, and the patient experienced a complete recovery in conjunction with reduced serum levels. CONCLUSIONS: LTG overdose may result in a severe but reversible encephalopathy, a previously undescribed phenomenon. LTG toxicity should be considered in patients taking this drug who have depressed mental status.

Anticonvulsants↗

Mononeuropathies associated with liver transplantation.

Mononeuropathies associated with orthotopic liver transplantation were evaluated in a prospective manner. Ten percent of liver transplant recipients were noted to have focal peripheral nerve lesions in the postoperative period. The ulnar nerve was most commonly involved, with intraoperative compression or postoperative trauma as possible mechanisms of injury. Other upper extremity mononeuropathies were likely a result of vascular cannulations. No brachial plexus injuries occurred. Diabetes and alcoholism were not risk factors for the development of a mononeuropathy.

Adult↗

Acute myopathy after liver transplantation.

Acute myopathy is a cause of weakness and additional morbidity in a variety of critically ill patients, including transplant recipients. We report the incidence of and risk factors associated with acute myopathy after orthotopic liver transplantation (OLTx). One hundred consecutive adult patients were prospectively assessed for muscle weakness after OLTx. Electrodiagnostic studies and muscle biopsies were performed on consenting affected patients. Potential risk factors for myopathy were evaluated in patients with myopathy versus control subjects. Seven patients developed acute persistent weakness after OLTx. Electrodiagnostic studies were consistent with a necrotizing myopathy. Histopathologic evaluation in five revealed a necrotizing myopathy with loss of myosin thick filaments. A higher initial index of illness severity, dialysis requirement, and higher doses of glucocorticoids were associated with development of myopathy. Patients with myopathy subsequently remained in the intensive care unit (ICU) longer than unaffected patients. In conclusion, acute substantial weakness was a source of additional morbidity in 7% of patients after OLTx. Most had myopathy with loss of myosin thick filaments. Patients with greater severity of illnesses and renal failure requiring dialysis were more likely to be affected. The effect of reducing exposure to corticosteroids in high-risk patients warrants further investigation.

Acute Disease↗

Percutaneous needle muscle biopsy in the evaluation of patients with suspected inflammatory myopathy.

OBJECTIVE: To determine the usefulness of a unique method of percutaneous needle muscle biopsy (NMB) in patients with suspected idiopathic inflammatory myopathy (IIM). METHODS: The yield of percutaneous NMB was studied in 55 patients who were found to have a combination of clinical, laboratory, or electromyographic features of IIM. RESULTS: A diagnosis of IIM was confirmed histopathologically in 29 patients (53%), other specific myopathies were found in 5 (9%), nonspecific myopathic changes were present in 11 (20%), and a neurogenic process was diagnosed in 3 (5%). Nonspecific changes or no abnormalities were present in 7 patients (13%). Followup of the 18 patients with nonspecific histopathologic findings disclosed that only 3 had a subsequent disease course compatible with IIM. CONCLUSION: Percutaneous NMB is a safe, convenient, and relatively inexpensive method of muscle biopsy, with a high diagnostic yield for the pathologic confirmation of IIM. It should be considered as a primary method of acquiring muscle for histopathologic examination in the evaluation of suspected IIM.

Adult↗

Hepatic myelopathy. Case report with review of the literature.

Hepatic myelopathy is a rare complication of hepatic insufficiency, causing progressive spastic paraparesis. There are few reports detailing the clinical and diagnostic aspects of this uncommon cause of neurological deterioration in patients with liver disease. Early recognition of this disorder will become more important as patients with liver disease survive longer due to medical advances, including liver transplantation. We present an additional patient with hepatic myelopathy associated with infantile portal vein thrombosis and review the previous reports of hepatic myelopathy in the English literature.

Adult↗

A sensitive new median-ulnar technique for diagnosing mild Carpal Tunnel Syndrome.

Carpal Tunnel Syndrome (CTS) is easily the most common focal peripheral nerve compression. The primary diagnostic tool is electrodiagnosis, although 13-27% of patients with symptoms and signs of CTS have normal electrodiagnostic results. The goal of this study was to create a more sensitive and specific latency difference criteria without any additional testing beyond the minimum. Statistical theory indicates that this would occur by comparing the latency most sensitive to CTS to the least sensitive latency. Data was evaluated from 68 normal hands, 23 hands of patients with symptoms and signs of CTS but normal standard results, and 88 hands of patients with CTS symptoms and signs of CTS with the diagnosis confirmed with standard criteria. The Median Sensory latency was the most sensitive parameter, while the Ulnar Motor Latency varied least in the presence of CTS, making the (Median Sensory-Ulnar Motor) latency difference the criteria of choice. Setting a cutoff value of 0.8 msecs for this difference correctly classified all normals, and all hands with CTS by standard criteria, and classified as abnormal 19/23 (82%) of hands with symptoms and signs of CTS but negative results by standard criteria. Overall the (Median Sensory-Ulnar Motor) Latency difference is a simple, easy, sensitive and specific test for CTS.

Carpal Tunnel Syndrome↗