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PubMed2006

Calibrated forceps: a sensitive and reliable tool for pain and analgesia studies.

UNLABELLED: Devices designed for mechanical pain threshold studies are often difficult to implement. The purpose of this study was to investigate a simple tool based on calibrated forceps to induce quantifiable mechanical stimulation in the rat on a linear scale. The most suitable protocol was tested by determining the effects of 3 repetitive measurements on both hind paws, respectively, during long-term (9 days), mid-term (1 day), and short-term (2 hours). Only threshold increase related to weight gain over long-term was observed, suggesting that moderate rat training can be used. The capacity of the device to reveal hyperalgesia was tested in a model of carrageenan-induced inflammation in the hind paw. The hyperalgesia was maximal 6 hours after carrageenan injection and progressively decreased. Similar, although more variable, responses were observed with von Frey filaments. Morphine-induced analgesia resulted in a dose-dependent increase of paw threshold. Tolerance to morphine administrated on a once daily schedule (10 mg/kg) during 5 days was revealed by a significant decrease in analgesia by day 3. Taken together, these results demonstrated accuracy of this device for easy, fast, and reproducible measure of mechanical pain threshold on rat limbs. Moreover, it allows the performance of rat testing with minimal constraint, which reduces data variability. PERSPECTIVE: The calibrated forceps is an easy to use device well-suited to rapidly test mechanical pain threshold with accuracy. It is well-designed for preclinical behavioral screening of noxious or analgesic properties of molecules.

Analgesics, Opioid↗
PubMed1980

Transjugular forceps retrieval of catheter embolus.

Intracardiac migration of an intravenous cathether was treated transvenously in 5 patients successfully. Using local anesthesia and fluoroscopic guidance, a bronchoscopy forceps was passed through the right jugular vein to the right atrium and afforded efficient and safe retrieval of the embolus. The direct route to the right atrium provided by the right internal jugular vein and the precise control offerred by the rigid forceps make this the preferred method of retrieval of a transvenous catheter embolus.

Adult↗
PubMedDate not supplied

Comparison of endoscopic forceps biopsies and capsule biopsies in determining disaccharidase activity in the duodenum.

Endoscopic biopsy is an accepted technique for obtaining samples of small bowel mucosa for histological examination. In this study a comparison between endoscopic forceps biopsies and capsule biopsies in estimating disaccharidase enzyme activity in the small bowel was evaluated. Disaccharidase levels on 168 consecutive small bowel biopsies obtained by either endoscopic biopsy or capsule biopsy were reviewed retrospectively. There was no significant difference in enzyme activity in samples collected by either method. Another 18 patients had simultaneous endoscopic and capsule biopsies from the second part of the duodenum. Again, there was no difference in enzyme activity between samples collected by either technique at the same level in the duodenum. The disaccharidase activity in forceps biopsies taken from the second part of the duodenum is equivalent to those obtained by capsule biopsy.

Adult↗
PubMed1995

Randomized controlled study of injury in the canine right colon from simultaneous biopsy and coagulation with different hot biopsy forceps.

BACKGROUND: Monopolar hot biopsy forceps (HBF), bipolar HBF, and cold biopsy forceps (CBF) followed by bipolar electrocoagulation are used clinically to simultaneously perform a biopsy and coagulate diminutive colon polyps and angiomata. Our purpose was to conduct a randomized, controlled study to evaluate the safety of these different techniques in the canine right colon. METHODS: After right colotomy in 8 mongrel dogs, colonic mucosa was grasped en face, tented, and biopsy performed in randomized order. The dogs were sacrificed after nine days and the biopsy sites were identified and histologically examined. RESULTS: Monopolar HBF caused an overall mean rate of acute serosal whitening of 29% compared with 0% for bipolar HBF and CBF and 6% for CBF/bipolar probe. Histologically confirmed transmural injury 9 days after biopsy occurred in 44% of monopolar HBF compared with 5% of bipolar HBF, 0% of CBF, and 50% of CBF/bipolar probe. CONCLUSIONS: Monopolar HBF had significantly higher rates of acute serosal whitening and histologic transmural damage than bipolar HBF or cold biopsy alone. On the basis of these results, monopolar HBF should be avoided for coagulation of small or flat right colon lesions such as diminutive polyps or angiomata.

Animals↗
PubMed1990

Small urothelial carcinoma: diagnosis and treatment by cold forceps biopsy.

From 1987 to 1988 we used cold biopsy forceps to remove completely 92 urothelial neoplasms ranging from 0.3 to 3 mm. Rigid biopsy forceps were used. The urologist usually treats these bladder neoplasms by diathermy coagulation, which obviously makes histological study impossible. On the other hand, due to the small size of these lesions even removal with the cutting loop inevitably causes deep regressive modifications that prevent accurate morphological evaluation. Histological examination of the neoplasms removed revealed the presence of low to medium grade (stage Ta, grades 1 to 2) noninfiltrating papillary carcinoma in 75 cases, high grade (stage Ta, grade 3) noninfiltrating papillary carcinoma in 9 and medium to high grade (stage T1, grades 2 to 3) infiltrating papillary carcinoma in 8, 1 of which had areas of squamous cell carcinoma. This method enabled us to study the morphology of the urothelial lesions in the initial phase. In our study population the number of high grade lesions and/or lesions with early signs of infiltration (17 of 92) appears to be noteworthy despite the small size of the tumors.

Biopsy↗
PubMed1984

Sheathed catheter system for fluoroscopically guided retrograde catheterization, and brush and forceps biopsy of the upper urinary tract.

A sheathed (coaxial) ureteral catheter has been designed for use in fluoroscopically guided retrograde procedures. Once the catheter has been inserted into the ureter the inner section is removed, leaving a semiflexible sheath as a conduit for biopsy forceps, curved catheters and other instruments. The sheath facilitates ureteral stenting, forceps biopsy of the renal pelvis and brush biopsy of all calices. The sheath also helps in percutaneous stone extraction by allowing retrograde passage and removal of balloon catheters with the patient in the prone position. Cystoscopy is needed initially to insert the catheter but not to pass instruments through the sheath. Thus, procedures can be completed in a standard fluoroscopy room.

Biopsy↗
PubMed2001

The combined use of a Fogarty balloon with extraction forceps for the controlled retrieval of an endobronchial foreign body.

Foreign body aspiration is a common problem in children necessitating prompt recognition and early treatment to minimize the potentially serious and sometimes even fatal consequences. We report the case of a 7 year old girl with a peanut lodged in her right main bronchus. Bronchoscopy identified the foreign body which was then removed by the combined use of a Fogarty balloon catheter and extraction forceps. This case differs from previous reports, in that the foreign body and forceps were removed separately from the balloon catheter, which theoretically should minimize the risks associated with this procedure.

Bronchi↗
PubMed2002

Extracting coins from the upper end of the esophagus using a Magill forceps technique.

OBJECTIVES: To assess the efficiency of a Magill forceps technique (MFT) in removing coins from the upper end of the esophagus. METHOD: The study population was 75 patients, all of them were children under the age of 12 years. This study was carried out in ENT department at Princess Basma Teaching Hospital during the period October 1996-September 1999. MFT is based on the insertion of a Mc-Intosch laryngoscope into the pharynx to elevate the larynx and to expose the esophageal entrance, then Magill forceps were advanced into the esophagus and opened in order to see and extract the coin from the esophagus. RESULTS: Seventy-one coins were successfully removed without any complications from 75 children admitted with coins in the upper end of the esophagus. In the remaining four cases, the coins had slipped down into the stomach. The average time taken to remove the coin was 30 s. CONCLUSION: MFT is a quick, easy and safe technique for removing coins from the upper end of the esophagus.

Child↗
PubMed2003

Video-optic cable endoscopy forceps.

We present a video-endoscopic technology for foreign body extractions with forceps. This can easily be followed and is recordable on video monitor in excellent quality. Instead of a rigid rod lens telescope, a fiberoptic video endoscope is inserted into the optical channel of a bronchoscopic forceps. This keeps the endoscopic device lightweight and easily maneuverable in different angles. The principle can be applied to other rigid diagnostic and therapeutic endoscopic equipment and represents a potential alternative technology to the use of cameras attached to rigid telescopes.

Endoscopes↗
PubMedDate not supplied

Renal biopsy with forceps through the femoral vein.

PURPOSE: To evaluate the usefulness of a new technique of transvascular renal biopsy with a flexible forceps in high-risk patients and compare its results with those reported for other techniques of renal biopsy. PATIENTS AND METHODS: Sixteen transfemoral renal biopsies were performed in 13 high-risk patients. Indications included severe bleeding disorders, combined renal-hepatic biopsy, morbid obesity, solitary kidney, and poor clinical condition. The technique was performed through the femoral vein; a 7-F Mullins introducer sheath was placed in a subcortical renal vein, and the biopsy was performed with a flexible biopsy forceps. RESULTS: Renal tissue was obtained in 15 of 16 procedures (93.7%) with at least one glomerulus in 14 of 16 (87.5%), and at least six glomeruli in 11 of 16 procedures (69%). Samples adequate for diagnosis were obtained in 13 of 16 procedures (81%). Mean number of glomeruli per procedure was 12.6 (range, 0-39). Aside from transient hematuria in two patients, no other complications were known to have occurred. CONCLUSIONS: Transfemoral renal biopsy is a safe technique for acquisition of renal samples in high-risk patients. The procedure can be performed at the same time as other vascular techniques. The histopathologic results, although worse than those obtained with the percutaneous approach, are better than those reported with other transvascular techniques.

Adult↗
PubMed2000

A modified tissue forceps for use during umbilical laparoscopic entry and closure.

A modification of the common tissue or thumb forceps facilitates initial transumbilical entry into the peritoneal cavity at the start of a laparoscopic procedure and at closure of that umbilical port. The modification consists of placement of teeth on the outside and inside of the forceps jaws. The instrument can be used to hold tissue and also as a spring retractor to hold open the umbilical crater. It is not now commercially available, but surgeons can obtain them from individual instrument makers.

Equipment Design↗
PubMed2001

Usefulness of long-jaw forceps in laparoscopic cornual resection of interstitial pregnancies.

Although laparoscopic surgery could be an option for treating interstitial pregnancies, it has not gained wide acceptance largely because of difficulty achieving hemostasis. To overcome this, we employed long-jaw forceps in three cases of interstitial pregnancy that were successfully treated by laparoscopic cornual resection. The forceps grasped a relatively large portion of pregnant myometrium without slipping, thus securing hemostasis and facilitating suturing.

Adult↗
PubMed1995

Extraction forceps for small hands.

This paper discusses the problems encountered by small handed dentists when extracting teeth using standard forceps. An alteration in the design of standard upper forceps is proposed which will be advantageous to small handed dentists. The new design is 'open bladed', that is, when the handles are closed the blades are manufactured to be 5 mm apart.

Dental Instruments↗
PubMed1983

Are biopsy forceps helpful in the endoscopic evaluation of ulcer diameter?

A hand-made papier-mâché stomach model with hollowed-out ulcers was employed for evaluating the accuracy in estimating ulcer diameters by means of endoscopy. The opened biopsy forceps were also used as a reference marker. Ten endoscopists with various degrees of experience were involved in the study. All the endoscopists underestimated the ulcer diameters; the use of the forceps, resulted in an improvement, in particular in the case of the comparatively inexperienced endoscopists. A stomach model may be helpful in the subjective assessment of the endoscopists' ability to estimate ulcer size.

Biopsy↗
PubMed1983

Evaluation of the new giant-biopsy forceps in the diagnosis of mucosal and submucosal gastric lesions.

In order to improve the diagnosis of gastric disorders on the basis of biopsy material, we devised larger biopsy forceps (5 mm X 2.5 mm in inside dimensions) which fit into the newer fibergastroscope, GIF-1T (Olympus). Samples from 116 cases yielded 276 specimens; 179 specimens (64.8%) showed the full-thickness of the mucosa with muscularis mucosae, and approximately one-third of the total specimens included a considerable amount of submucosal tissue, but none of them contained parts of muscularis propria. In 4 out of 36 gastric carcinoma cases there was inconsistency between endoscopic and histological recognition of the proximal border of carcinomatous infiltration. Differentiation between adenoma and IIa, and benign and malignant lymphoma were more feasible with our forceps. No complications apart from minor bleeding were seen.

Adenoma↗