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Results for “needle”

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At least 163 records · Page 9Linked to original sources

PubMed2005

[Clinical observation on abdominal cluster-needling combined with sacro-iliac-needling for treatment of chronic pelvic inflammation].

OBJECTIVE: To observe therapeutic effect of abdominal cluster-needling combined with sacro-iliac-needling on chronic pelvic inflammation. METHODS: One hundred and ten cases of pelvic inflammation were randomly divided into a treatment group and a control group. The treatment group of 70 cases were treated by abdominal cluster-needling combined with sacro-iliac-needling; the control group of 40 cases were treated by oral administration of Fuyankang tablet. Their therapeutic effects were compared. RESULTS: The cured rate and the total effective rate were 75.7% and 97.1% in the treatment group, and 37.5% and 85.0% in the control group, respectively, with significant difference between the two groups (P < 0.01, P < 0.05). CONCLUSION: The therapeutic effect of abdominal cluster-needling combined with sacro-iliac-needling is significantly better than that in the control group for chronic pelvic inflammation.

Abdomen↗

PubMed2006

[Observation on therapeutic effects of centro-square needling and triple needling on ankylosing spondylitis].

OBJECTIVE: To probe therapeutic effects of centro-square needling and triple needling on ankylosing spondylitis. METHODS: Sixty cases of spondylitis were randomly divided into a treatment group and a control group. The treatment group were treated with centro-square needling and triple needling, and the control group with routine acupuncture therapy, with motortherapy combined in the two groups. RESULTS: Both the therapeutic methods were effective, but the therapeutic effect in the treatment group was significantly better than that in the control group (P < 0.05). CONCLUSION: Acupuncture combined with motortherapy has definite therapeutic effect on ankylosing spondylitis, with centro-square needling and triple needling having better therapeutic effect.

Acupuncture Therapy↗

PubMed2006

Application of a single needle type for all image-guided biopsies: results of 100 consecutive core biopsies in various organs using a novel tri-axial, end-cut needle.

PURPOSE: To assess feasibility, results and complications in image-guided biopsies using a single needle design in various organs. MATERIALS AND METHODS: 100 consecutive percutaneous biopsies were performed in 54 females and 46 males aged 24-87 years (mean age/standard deviation: 64.5 +/- 12 years) using a full-core end-cut tri-axial full-automatic biopsy needle (18 gauge BioPince, InterV-MDTech, Gainesville, Florida) under CT (n = 45) or ultrasound (n = 55) guidance. In 63 biopsies a coaxial technique was used. RESULTS: Biopsies were obtained of liver (n = 32), lymph nodes (n = 17), thyroid (n = 11), lung (n = 9), adrenal (n = 9), pelvis (n = 6), chest wall/pleura (n = 6), mediastinum (n = 4), lytic bone lesions (n = 2), retroperitoneum (n = 1), muscle (n = 1), pancreas (n = 1), peritoneum (n = 1). Between 1 and 6 (mean/SD 2.83 +/- 0.92) needle passes were performed. In 77 cases a malignant (40 metastases, 37 primary tumours) and in 23 a benign lesion was diagnosed. Of the 23 benign lesions a specific diagnosis was possible in 22. In one case necrosis and haemorrhage was diagnosed. In this patient surgery and autopsy both revealed a mediastinal haematoma of unknown origin. Eight minor complications (mild pain/local haematoma requiring no therapy) and three major complications (three pneumothoraces in nine lung biopsies requiring two aspirations and one drainage) were observed. There was no mortality. CONCLUSION: Percutaneous image-guided biopsy using the described full-core end-cut needle resulted in a specific diagnosis in 99/100 consecutive biopsies in various organs with a low complication rate. We use this needle type for all CT- or US-guided biopsies in all organs except for solid bone.

Adult↗

PubMed1996

Transthoracic needle biopsy with a coaxially placed 20-gauge automated cutting needle: results in 122 patients.

PURPOSE: To determine the utility of coaxial transthoracic needle biopsy (TNB) with use of a 20-gauge automated cutting biopsy needle in the diagnosis of thoracic lesions. MATERIALS AND METHODS: A retrospective review was performed in 122 patients. Computed tomography was used to guide coaxial TNB, which was performed with aspirating (n = 87) and automated cutting (n = 99) needles. The sensitivities for malignant and benign lesions were determined, with a comparison of the relative yields from the two techniques. RESULTS: The overall diagnostic yield for coaxial TNB was 88%. For malignancy the sensitivity was 95%, whereas a specific benign diagnosis was obtained in 91%. Although no difference was found for fine-needle aspiration versus core biopsy of malignant lesions (92% vs 86%), a statistically significant difference was found for benign lesions (44% vs 100%, P<.05). Pneumothorax occurred in 54%. CONCLUSION: Coaxial TNB performed with an automated cutting needle helps provide a diagnosis in the majority of patients with focal chest disease and is particularly useful in the diagnosis of benign lesions.

Adolescent↗

PubMed1998

Evaluation of biopsy needles and prototypic needle guide devices for percutaneous biopsy with CT fluoroscopic guidance in simulated organ tissue.

The authors evaluated accuracy and success rates for placement of fine-aspiration, core, and coaxial biopsy needles in pork meat with three needle guide devices and computed tomographic fluoroscopic guidance. Accuracy and reliability with a metallic sponge-forceps needle holder was equal to or greater than those with other devices, and it was preferred by operators due to its lighter weight and single-handed manipulation. All needle holders functioned poorly with thin-walled needles.

Animals↗

PubMedDate not supplied

Modified technique for fine needle aspiration biopsy that eliminates needle manipulation.

OBJECTIVE: To evaluate a modified technique of fine needle aspiration biopsy that eliminates needle manipulation after aspiration. STUDY DESIGN: Fine needle aspiration biopsy of 112 palpable lesions was performed using both the conventional and modified techniques. Cellularity, cell preservation and diagnostic yield of the new procedure were compared to those of the conventional technique. RESULTS: Cytologic smears prepared from each method were comparable in quality, quantity and diagnostic yield. CONCLUSION: The modified approach eliminates the hazard of needle manipulation without diminishing the diagnostic efficacy of fine needle aspiration biopsy.

Biopsy, Needle↗

PubMed2002

Needle exchange: how the meanings ascribed to needles impact exchange practices and policies.

The consistency among needle exchange practices, HIV prevention, harm reduction goals, and potential program effectiveness are analyzed. Using a modified ethnographic approach, qualitative interviews were conducted with staff (n = 59) of needle exchange programs (NEPs; n = 15). Interviews addressed operational policies; funding and challenges. An iterative, inductive analytic process was used. Differences in exchange practices are traced to differences in how workers define needles as objects of "risk" and/or "prevention." The weight accorded to each definition has implications for service delivery. Among NEPs that ascribe a "risk" meaning, workers enforce a strict one-for-one exchange, encourage clients to take fewer needles, and penalize clients. Programs that focus on the "prevention" meaning of needles work towards improving access, problem solving about proper disposal and do not penalize clients. Operational policies that restrict access to sterile equipment or discourage attendance need to be reconsidered if HIV prevention goals are to be realized.

Canada↗

PubMed1996

Can core needle biopsy replace fine-needle aspiration cytology in the diagnosis of palpable breast carcinoma. A comparative study of 124 women.

BACKGROUND: There appears to be a growing movement in favor of core needle biopsy (CNB) over fine-needle aspiration (FNA) cytology in detecting breast carcinoma in women. The authors compared the sensitivity and specificity of these two methods in patients who presented to The University of Texas M. D. Anderson Cancer Center for evaluation of a palpable breast mass. METHODS: One hundred and twenty-four women (mean age, 51 years; range, 28-86 years) with a clinically suspicious palpable mass (mean size, 4.4 cm; range, 1-12 cm) underwent concurrent FNA and CNB. For the FNA, an average of three needle passes were made. FNA was followed by three CNBs using the Bard Monopty needle. CNB samples were submitted for frozen section to determine adequacy, and an additional three cores were performed if the first batch was deemed inadequate. All patients ultimately had histologic confirmation of their neoplasms either by the core needle procedure or by definitive open surgical biopsy. Features of cases with discrepant diagnoses were examined in relation to tumor size and histologic type. RESULTS: Specificity of both FNA and CNB was 100%. The sensitivity in detecting a malignant neoplasm was higher for FNA than for CNB (97.5% vs. 90%, P < 0.004). CONCLUSIONS: In our experience, FNA of palpable breast lesions is a more sensitive method for the detection of carcinoma regardless of tumor type, size, or differentiation. Contrary to other reports, not only was FNA alone more sensitive than CNB alone, the addition of CNB to an already negative FNA failed to increase sensitivity in the detection of carcinoma. However, CNB did contribute to a more definitive diagnosis in some cases. The authors also found FNA to be more cost effective than CNB for palpable breast lesions when time and effort are taken into consideration. This reinforces the benefit of FNA over CNB in the detection of early stage breast carcinoma.

Adult↗

PubMed2003

Total RNA yield and microarray gene expression profiles from fine-needle aspiration biopsy and core-needle biopsy samples of breast carcinoma.

BACKGROUND: Gene expression profiling should be applicable to needle biopsy samples if microarray technology is to become practically useful for clinical research or management of breast carcinoma. This study compared gene expression profiles derived from fine-needle aspiration biopsy (FNAB) and from core needle biopsy (CBX). METHODS: Total RNA was extracted from single FNAB and CBX samples. Corresponding pairs of FNAB and CBX were analyzed for similarity of gene expression profiles using cDNA microarrays that contain 30721 human sequences. A subset of genes that distinguished CBX samples from FNAB samples was evaluated in a larger group of needle biopsy samples and in a published genomic database derived from 78 sporadic breast carcinomas with known clinical outcome. RESULTS: Sixty-eight patients with newly diagnosed breast carcinoma were included in the current study. Sixty-five patients underwent FNAB (17 had both FNAB and CBX) and 3 underwent CBX only. Extracted RNA was of suitable quality for hybridization in 46 (71%) FNABs and 15 (75%) CBXs. Total RNA yield in those samples was similar for single-pass FNAB (mean = 3.6 microg and median = 2.2 microg; n = 46) and CBX (mean = 2.8 microg and median = 2.0 microg; n = 15), with 1 microg or more of total RNA in all cases. Transcriptional profiling was performed successfully in all cases when it was attempted, in a total of 50 samples (38 FNABs and 12 CBXs), including matched FNAB and CBX samples from 10 patients. There were differences in gene expression profiles in 10 matched FNAB and CBX sample pairs. Genes that were expressed differently in CBX samples, compared with FNAB samples, were recognized as being predominantly from the endothelium, fibroblasts, myofibroblasts or smooth muscle, and histiocytes. Corresponding microscopic cell counts from FNABs demonstrated means of 80% tumor cells, 15% lymphocytes, and 5% stromal cells, whereas CBXs contained 50% tumor cells, 20% lymphocytes, and 30% stromal cells. Considering that CBXs are approximately six-fold richer in nonlymphoid stromal cells than FNABs and that CBXs differentially express a set of recognized stromal genes, the authors used these biopsies to define a transcriptional profile of breast carcinoma stroma. A set of 120 genes differentially expressed in CBXs was assessed independently in a published breast carcinoma genomic database to classify breast carcinomas based on stromal gene expression. Subgroups of tumors with low or high stromal signal were identified, but there was no correlation with the development of systemic metastases within 5 years. CONCLUSIONS: Both FNAB and CBX yield a similar quality and quantity of total RNA and are suitable for cDNA microarray analyses in approximately 70-75% of single-pass samples. Transcriptional profiles from FNAB and CBX of the same tumor generally are similar and are driven by the tumor cell population. The authors concluded that each technique has relative advantages. The FNABs provide transcriptional profiles that are a purer representation of the tumor cell population, whereas transcriptional profiles from CBXs include more representation from nonlymphoid stromal elements. Selection of the preferred needle biopsy sampling technique for genomic studies of breast carcinomas should depend on whether variable stromal gene expression is desirable in the samples.

Adult↗

PubMed1975

A study to assess the intradermal, triangular needle and bifurcated needle techniques in the administration of BCG to newborns.

BCG at birth was administered to 3,297 new born babies in Hong Kong using the intradermal, simple triangular and bifurcated needle techniques. Tuberculin testing at 3 months showed similar mean reactions for the intradermal and simple triangular needle methods, namely 9-74 mm and 9-87 mm with 9-94 mm for the triangular needle method when the BCG strength was doubled. Using the bifurcated needle the mean reactions were significantly lower; 8-69 mm, 9-01 mm with double strength BCG and 8-92 mm with puncture through a skin drop. It is concluded that the bifurcated needle is not a satisfactory method of administering BCG to newborns even if the concentration of BCG is increased. In circumstances such as in small maternity units, where the intradermal technique is not warranted, it is recommended that the simple triangular method should be used.

BCG Vaccine↗

PubMed1993

The combination of aspiration needle biopsy with fine needle aspiration in the preoperative evaluation of breast tumors.

During a period of 10 years, 2906 women (mostly asymptomatic) were referred to us for physical breast examination. Fine needle aspiration (FNA) was used to examine a nodule or a breast thickening in 860 of these patients. One hundred and ten of these patients also underwent a large needle biopsy (LNB) to add a pre-operative histological evaluation. LNB was performed with 18-20 gauge needles, without cutting the skin and without adding any significant pain or discomfort to that caused by FNA (aspiration needle biopsy, ANB). Diagnostic sensitivity for cancer was 89% for FNA and 100% for ANB. ANB allowed us to correctly identify two cancers with post-operative stage T1N0M-0, which were diagnosed pre-operatively as benign by FNA. The combination of the two needle aspiration techniques (FNA and ANB) allowed us to diagnose 51 of all the 54 cancers (95%). The predictive value of a diagnosis of definite malignancy was 100% for either FNA or ANB. The predictive value of a diagnosis of suspected malignancy showed a predictive value of 72% for FNA and 70% for ANB. Three benign nodules with pre-operative ANB findings of suspected cancer were correctly diagnosed by FNA. Of the 12 cancers with inadequate ANB findings, 11 were correctly diagnosed by FNA. Sixteen of the cancers correctly identified by ANB showed a post-operative size of 2 cm or less (ten cases) or no metastatic axillary lymph-nodes (nine cases).(ABSTRACT TRUNCATED AT 250 WORDS)

Biopsy, Needle↗

PubMedDate not supplied

Over-the-needle versus microcatheter-through-needle technique for continuous spinal anesthesia: a preliminary study.

BACKGROUND AND OBJECTIVES: A new catheter-over-needle design (Spinocath, B. Braun) has been developed to minimize problems and complications of continuous spinal anesthesia with microcatheters, which include difficult catheter insertion, failure of insertion, breakage, inadequate anesthesia, postdural puncture headache, and, rarely, development of cauda equina syndrome. METHODS: A comparative evaluation of this new catheter (22-gauge Spinocath) to the microcatheter (28-gauge Portex) was performed to study the problems of insertion, complications, quality of anesthesia, and postoperative analgesia in a prospective, randomized manner. Patients were allocated to two groups of 10 each: catheter-over-the-needle group (group I) and microcatheter-through-the needle (group II). Postoperative protocol consisted of an infusion of 0.125% isobaric bupivacaine delivered with a syringe infusion pump for 24 hours. RESULTS: The two groups were comparable in relation to age, sex, type of surgery, median height of the block, and the time taken for catheter insertion and surgery. Spontaneous backflow of cerebrospinal fluid (CSF) through the catheter with the needle in position was possible only in the spinocath group (8/10 cases). Initial introduction of the catheter into the subarachnoid space (8 vs 3: chi-square = 5.05; P = .03) and threading of the catheter were easier (8 vs 3 cases: chi-square = 5.05; P = .03) in group I. Aspiration of CSF was easy in group I in all ( 10 vs 2: chi-square = 13.33; P = .004). Complications such as resistance to drug injection, kinking (P < .05), inadequate anesthesia, and supplementation with general anesthesia were seen only in group II. Postoperative pain relief was comparable in both groups (P > .05). Both groups were comparable hemodynamically in the intra- and postoperative periods. CONCLUSIONS: Insertion, maintenance, and clinical effects were better achieved with the catheter-over-the needle design compared to the microcatheter. These preliminary findings need to be confirmed by a larger study.

Adult↗

PubMedDate not supplied

New needle for two needle hemodialysis.

A new venous needle (VN) that also can be used as an arterial needle (AN) has been designed to diminish the undesirable hemodynamic effects of dialysis with high blood flow rate (300-600 ml/min) in arteriovenous polytetrafluoroethylene grafts, and in accesses of short length (U.S. Patent No. 5,662,619). The preferred embodiment has one distal opening, two lateral openings, and two diverters located in the interior surface of the shaft adjacent to each lateral opening. The diverters facilitate the flow of blood to the outside of the needle through the lateral openings. The new VN ejects three jets of blood, contrary to the currently used VN, which ejects one jet of high velocity. This decreases the velocity of the VN flow and the velocity; turbulence; wall shear stress; and positive pressure of the flow, past the VN, during dialysis. These may decrease the endothelial damage, intimal hyperplasia, stenoses, thromboses, and recirculation of dialysis blood (RODB). When used as an AN, the new needle lowers the negative pressure surrounding the AN and the RODB. In summary, the new needle may decrease the complications and prolong the life span of the accesses and improve the performance of dialysis.

Blood Flow Velocity↗

PubMed1996

Needle-tip repositioning during computed-tomography-guided transthoracic needle aspiration biopsy of small deep pulmonary lesions: minor adjustments make a big difference.

The aim of the study was to determine whether a thin-gauge transthoracic biopsy needle would be deflected from a straight path as it passed through lung tissue, and whether partially withdrawing the needle and reinserting it while applying pressure could significantly change the degree of deflection. Using a cadaver lung, we showed that the needle tip was deflected, on average, 2.5 mm from a straight path in a direction opposite to the bevel. The reinsertion technique using pressure caused the average deflection to increase to 6.3 mm, a significant difference from the previous value. We have found this technique to be useful in the performance of transthoracic needle aspiration biopsy of small deep pulmonary nodules where differences in positioning of the needle tip by only a few millimeters can achieve the correct, rather than an indeterminate, diagnosis.

Biopsy, Needle↗

PubMedDate not supplied

Risk of needle-track seeding after diagnostic image-guided core needle biopsy in breast cancer.

OBJECTIVE: Image-guided core needle biopsy (IGCNB) is an accepted technique for sampling nonpalpable mammographically detected suspicious breast lesions. However, the concern for needle-track seeding in malignant lesions remains. An alternative to IGCNB is needle-localization breast biopsy (NLBB). No study has been done to compare the local recurrence rate of breast cancer after IGCNB versus NLBB. METHODS: We have retrospectively reviewed the local recurrence of breast cancer in patients diagnosed by either IGCNB or NLBB who underwent breast-preserving treatment for their cancer between May 1990 and June 1995. The length of follow-up averaged 29.7 months. RESULTS: Three hundred ninety-eight patients were diagnosed with breast cancer by IGCNB (297 patients) or NLBB (101 patients). All patients underwent breast-conserving surgery. Fifteen (3.77%) patients had a local recurrence: 11(3.70%) in the IGCNB group and 4 (3.96%) in the NLBB group. These recurrence rates are not statistically different. CONCLUSION: Concerns for seeding of the needle track with cancer cells have made some surgeons wary of IGCNB. However, we did not find an increased rate of recurrence due to needle-track seeding, and IGCNB remains our procedure of choice for diagnosing mammographically detected suspicious breast lesions.

Biopsy, Needle↗

PubMed1992

[CT-guided percutaneous lung biopsy using a cutting needle and an automated biopsy gun. Comparison with lung biopsy using a manual aspiration needle].

Twenty-five percutaneous lung biopsies using a 20-gauge cutting needle and automated biopsy gun (ABG) were performed under CT guidance in 25 patients with thoracic lesions. This procedure was compared with that using a 21-gauge manual aspiration needle in 36 patients (40 examinations, 37 lesions) in terms of success rate, rate of correct diagnosis, mean examination time and rate of complications. Specimens obtained from lung biopsy were graded by a histopathologist according to quality and quantity from 0 to 4 (pathological score). There were no statistically significant differences between the two procedures in terms of success rate, rate of correct diagnosis and rate of complications; only the time required was significantly different. However, sufficient biopsy material and a mean pathological score of G-II 2.8 (that of G-I was 1.9, p less than 0.05) could be obtained by the biopsy procedure using the cutting needle. The above results indicated that aspiration needle biopsy was adequate for lung biopsy, but that a cutting needle and ABG should be used when a good biopsy specimen is needed for tissue diagnosis.

Adolescent↗

PubMed2005

[On the needling depth of filiform needle at acupoints].

OBJECTIVE: To promote the study on standardization of needling depth of acupoints, ensure safety of needling, and promote internationally academic exchanges of acupuncture and moxibustion. METHODS: Study, analyze ancient and present literature of acupuncture and moxibustion, and compare the differences in needling depth, measure unit, description methods, and the causes and trend, and indicate confusion at present, and put forward a proposition for establishing standardization of needling depth. CONCLUSION: There are a lot of confusions in needling depth of acupoints from the ancient times to the present, which produces severe unfavorable influence on standardization and international exchanges of acupuncture and moxibustion science, and it remains to be studied for the standardization as early as possibly.

Acupuncture↗

PubMed2006

A case of needle tract implantation of hepatocellular carcinoma after percutaneous biopsy with an 18G Tru-cut needle.

Needle tract implantation of hepatocellular carcinoma (HCC) is a rare complication of percutaneous biopsy, and it is largely associated with end-cutting needles or aspiration biopsy. The CT findings that have been reported include oval or round soft tissue nodules with persistent contrast enhancement along the needle tract, mostly in the subcutaneous tissue or the intercostal muscle layers. In this report, we describe a case of needle tract implantation of HCC after US-guided percutaneous biopsy with an 18G tru-cut needle.

Adult↗