A comparison test on the number of puncture coring is conducted using the normal needle and the Huber needle in the injection area of the implantable drug-supplying device separately. The result indicates that the number of coring using the Huber needle is much less than that using the normal needle during the puncturing. So it is suggested to popularize the Huber needle in the drug transfusion of the implantable drug-supplying device.
Infusion Pumps, Implantable ; classification ; Needles

With a microsystem or micropump, the release rate of drug delivery is able to be controlled easily to maintain the therapeutic efficacy. A piezoelectric membrane-valve micropump for implantable and carryhome drug delivery system is developed and tested. The influence elements of dynamic performance of the PZT actuator and valve were analyzed, and the calculation method of resonant frequency of the membrane valve was provided. Study results showed that the output performance of the micropump depended on the coupling effect of the actuator and valve. For a given actuator, the output value and the optimal frequency of a micropump could be enhanced only by valve design. Two micropumps with different valve dimensions were fabricated for comparing examination. The smaller -valve micropump obtained higher output values (the maximum flow rate and backpressure being 3.5 ml/min and 27 KPa, respectively) and two optimal frequencies (800 Hz and 3 000 Hz). The larger -valve micropump achieved lower output values (the maximum flow rate and backpressure being 3.0 ml/min and 9 KPa, respectively) and one optimal frequency (about 200 Hz). The test results suggest that the output values and optimal frequency of micropump can be improved by changing the valve dimension, and the viewpoint that checkvalve micropump works only with low acting frequency is wrong.
Drug Delivery Systems ; instrumentation ; Equipment Design ; Humans ; Infusion Pumps, Implantable ; Micro-Electrical-Mechanical Systems ; instrumentation

This paper proposes a one-way micro valve with a simple structure and a simulation design for the engineering capsule. We have now got its design parameter selection method and its mechanic characteristic from experiments.
Capsules ; Computer Simulation ; Drug Delivery Systems ; methods ; Equipment Design ; Infusion Pumps, Implantable ; Technology, Pharmaceutical ; instrumentation ; methods

Intrathecal drug administration system (ITDAS) can reduce the side effects while increasing the effectiveness of opioids compared to systemic opioid administration. Therefore, the use of ITDAS has increased in the management of cancer pain and chronic intractable pain. Catheter obstruction is a serious complication of ITDAS. Here, we present a case of catheter obstruction by a mass formed at the side hole and in the lumen. A 37-year-old man suffering from failed back surgery syndrome received an ITDAS implantation, and the ITDAS was refilled with morphine every 3 months. When the patient visited the hospital 18 months after ITDAS implantation for a refill, the amount of delivered morphine sulfate was much less than expected. Movement of the pump rotor was examined with fluoroscopy; however, it was normal. CSF aspiration through the catheter access port was impossible. When the intrathecal catheter was removed, we observed that the side hole and lumen of the catheter was plugged.
Adult ; Analgesics, Opioid ; Catheter Obstruction ; Catheters ; Catheters, Indwelling ; Failed Back Surgery Syndrome ; Humans ; Infusion Pumps, Implantable ; Injections, Spinal ; Morphine ; Pain, Intractable ; Stress, Psychological

OBJECTIVETo evaluate safety and effect of percutaneous chemotherapy pump placement for portal vein chemotherapy in management of colorectal cancer with hepatic metastasis.

METHODSTwenty-three cases of colorectal cancer with liver metastasis were treated with percutaneous chemotherapy pump placement for portal vein chemotherapy, and the therapeutic effect of this treatment was observed.

RESULTSPartial remission of the hepatic lesions was achieved in 13 (56.5%) of the patients following the treatment, and the condition was stabilized in 5 patients (21.7%). No severe complications were observed in these patients.

CONCLUSIONPercutaneous chemotherapy pump placement for portal vein chemotherapy can be safe and effective for management of hepatic metastasis of colorectal cancer.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; administration & dosage ; Colorectal Neoplasms ; pathology ; Female ; Humans ; Infusion Pumps, Implantable ; Infusions, Intravenous ; Liver Neoplasms ; drug therapy ; secondary ; Male ; Middle Aged ; Portal Vein

The intrathecal drug delivery system (ITDDS), an effective treatment tool for intractable spasticity and pain, is associated with various complications but breakage of the catheter is rare. We report the case of a 50-yr-old man with ITDDS, in whom an intrathecal catheter was severed, resulting in a 28.6-cm-long intrathecal fragment. The catheter completely retracted into the intrathecal space from the anchor site. The catheter was severed during spine flexion, and the total distal fragment was repositioned in the intrathecal space. Although the outcome of ITDDS was associated with the length or diameter of the broken catheter, no neurologic complications occurred in our patient. Thus, we inserted another catheter instead of removing the old one. Thereafter, the patient has been regularly followed up, and no neurologic complications have developed during the 28 months.
Brachial Plexus/injuries ; Catheters ; Drug Delivery Systems ; *Equipment Failure ; Fluoroscopy ; Humans ; Infusion Pumps, Implantable/*adverse effects ; Injections, Spinal/instrumentation ; Male ; Middle Aged ; Morphine/therapeutic use ; Pain/*drug therapy/etiology

BACKGROUND/AIMS: There has been no standard treatment for advanced hepatocellular carcinoma (HCC) until now. The aim of this study was to evaluate the efficacy of hepatic arterial infusion therapy (HAIT) using 5-fluorouracil (5-FU) and cisplatin (CDDP) for advanced HCC. METHODS: Twenty patients received repeated HAIT using an implanted drug delivery system. Of the 20 patients, eight patients had HCC with portal vein tumor thrombosis (PVTT), eleven patients had residual tumor despite transcatheter arterial chemoembolization (TACE) or percutaneous ethanol injection therapy (PEIT), and one patient had multiple recurrent HCC nodules after surgical resection. The patients were repeatedly treated with an arterial infusion of 5-FU (250 mg/5 hours on day 1-5) and CDDP (10 mg/1 hour on day 1-5) via the drug delivery system at three weekly intervals. RESULTS: Of the 20 patients, three patients were excluded from the study due to death within the first 1 week of treatment or during follow-up before evaluation. The response rate according to tumor size on abdominal CT was 29.4% (5 patients). One of the five patients showed a complete response (CR, 5.9%), three patients showed partial responses (PR, 17.6%), and one patient showed a minor response (MR, 5.9%). Chemotherapy- related side effect, such as grade I-II nausea (n=2), grade II vomiting (n=1), fever (n=1), drug eruption (n=1) and catheter-related complication such as dislodgement of the catheter (n=2), occurred in six patients. CONCLUSIONS: HAIT using the FP regimen is another option for patients having advanced HCC with PVTT or for patients showing an ineffective response to other therapies.
Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols/*therapeutic use ; Carcinoma, Hepatocellular/*drug therapy/radiography ; Cisplatin/administration & dosage ; English Abstract ; Fluorouracil/administration & dosage ; *Hepatic Artery ; Humans ; Infusion Pumps, Implantable ; *Infusions, Intra-Arterial ; Liver Neoplasms/*drug therapy/radiography ; Male ; Middle Aged

OBJECTIVETo evaluate the value of infusion chemotherapy by pump implantation via hepatic artery or portal vein or both (double-pump chemotherapy, DPC) for hepatic metastasis from colorectal cancer.

METHODSThirty patients with hepatic metastasis from colorectal cancer were divided into three groups: 1. Group I-DPC (12 patients). 2. Group II-hepatic artery implantation chemotherapy (10 patients) and 3. Group III-portal vein implantation chemotherapy (8 patients).

RESULTSResponse rate was 66.7% in group I, 60% in group II and 37.5% in group III. The 0.5-, 1-, 2-year survival rates were 100.0%, 75.0%, 41.7% in group I, 90.0%, 60.0%, 30.0% in group II and 87.5%, 50.0%, 25.0% in group III.

CONCLUSIONDouble pump implantation chemotherapy is effective in treating hepatic metastasis from colorectal cancer. It is better than hepatic artery or portal vein pump-implantation chemotherapy alone.

Adult ; Aged ; Colorectal Neoplasms ; drug therapy ; pathology ; Drug Therapy ; methods ; Female ; Hepatic Artery ; Humans ; Infusion Pumps, Implantable ; Infusions, Intra-Arterial ; Infusions, Intravenous ; Liver Neoplasms ; drug therapy ; secondary ; Male ; Middle Aged ; Portal Vein ; Therapeutics

This report describes the long term safety and efficacy of intrathecal therapy using Sufentanil for the management of chronic intractable neuropathic pain in 12 chronic pain patients. Standardized psychological screening was used to determine treatment suitability. Evaluation data included the Visual Analog Scale (VAS), Wong-Baker Faces Scale, Brief Pain Inventory (BPI), Disability of Arm, Shoulder, and Hand (DASH), McGill Quality of Life Questionnaire, and complications (granulomas, toxicity, withdrawal, or deaths). SPSS version 18 was used for data analysis. Pre- and post- treatment BPI measures and pain scale scores showed a statistically significant difference. There were no complications directly related to drug toxicity, nor drug withdrawals, granulomas, or deaths. Intrathecal therapy with Sufentanil therapy offers a good treatment alternative for those cases that have failed both surgery and standard pain treatment. Strict patient selection based on psychological screening, control of co-morbidities, a proper pain management may contribute to successful outcome.
Arm ; Chronic Pain ; Drug-Related Side Effects and Adverse Reactions ; Granuloma ; Hand ; Humans ; Infusion Pumps, Implantable ; Mass Screening ; Neuralgia ; Pain Management ; Pain, Intractable ; Patient Selection ; Quality of Life ; Surveys and Questionnaires ; Shoulder ; Statistics as Topic ; Sufentanil* ; Visual Analog Scale

PURPOSE: Intrathecal morphine pump (ITMP) infusion therapy is efficient in managing malignant and nonmalignant chronic pain refractory to standard treatment. However, the high cost of an ITMP is the greatest barrier for starting a patient on ITMP infusion therapy. Using the revised Korean reimbursement guidelines, we investigated the cost effectiveness of ITMP infusion therapy and conducted a patient survey. MATERIALS AND METHODS: A retrospective chart review of 12 patients who underwent ITMP implantation was performed. Morphine dose escalation rates were calculated, and numeric rating scale (NRS) scores were compared before and after ITMP implantation. We surveyed patients who were already using an ITMP as well as those who were candidates for an ITMP. All survey data were collected through in-person interviews over 3 months. Data on the cost of medical treatment were collected and projected over time. RESULTS: The NRS score decreased during the follow-up period. The median morphine dose increased by 36.9% over the first year, and the median time required to reach a financial break-even point was 24.2 months. Patients were more satisfied with the efficacy of ITMP infusion therapy than with conventional therapy. The expected cost of ITMP implantation was KRW 4000000-5000000 in more than half of ITMP candidates scheduled to undergo implantation. CONCLUSION: The high cost of initiating ITMP infusion therapy is challenging; however, the present results may encourage more patients to consider ITMP therapy.
Adult ; Aged ; Analgesics, Opioid/*administration & dosage/economics/therapeutic use ; Chronic Pain/*drug therapy ; Cost-Benefit Analysis ; Female ; Humans ; Infusion Pumps, Implantable/*economics ; Injections, Spinal ; Male ; Middle Aged ; Morphine/*administration & dosage/economics/therapeutic use ; Pain Management/*methods/trends ; Patient Satisfaction ; Republic of Korea ; Retrospective Studies ; Surveys and Questionnaires ; Treatment Outcome