1logical construction,delicate craft 2.simple operation 3.stable in performance 4.attractive and novel in appearance 5. logical construction,delicate craftsimple operationstable in performanceattractive and novel in appearancereliable quality,sturdy and durable

SIX:Equipment Installation And Inspection

Open the therapy apparatus,load liquid nitrogen,tighten.Install the cold head,open the control valve,spray the liquid nitrogen without liquid leakage.

SEVEN:Use and Maintenance

clean the equipment before operationThere is no need to pre-cooling the receiver when loading the liquid nitrogen.Don’t fill too much liquid nitrogen (no more than 200ml)

Note:The best distance between liquid level and mouse of receiver is 10mm.

Put the cap back on the receiver quickly.Fasten screwed cutting ferrule.Close control valve’s switch.Outlet pipe begins to spray gas.Open control valve’s switch when stop using. .Outlet pipe stops spraying gas.Dispose the liquid nitrogen in the receiver before use.Put the equipment in the box when use.Keep the purity of liquid nitrogen to avoid blocking perfusion tube and outlet pipe.Keep away from hit and pump to avoid damaging.If the shell of receiver is coverd with water or frost,it means that vacuum tightness of receiver’s glass liner is broken.Stop using and change another one.

One :Breif Introduction

DZ_4 is a small type of handheld low temperature treatment instrument. Equiped with proper cold head,it can be  applied to dermatologic , ophthalmologic,ophthalmologicandotorhinolaryngologic,anorectal, gynecologic, oncologic therapy.

Two:Work Principle

DZ_4 low temperature treatment instrument uses liquid nitrogen as refrigerant substance. Liquid nitrogen is stored in an airtight receiver.Receiver gets pressure by liquid nitrogen’s spontaneous evaporation. Liquid nitrogen flows form perfusion tube to cold head under pressure.( Liquid nitrogen gasifies fiecely in cold head and then gas is discharged through outlet pipe.)Cold head can form low-temperature circumstance under nitrogen’s cold service.Set the cold head on proper therapy temperature when using.Freeze the focus when cold head is in touch with the focus,then the focus is damaged in order to achieving curing without pain.

Three: Scope Of Application

Cryosurgery can cure many kinds of  benign dermatosis and 5 kinds of precancerous dermatosis by freezing.Disease names are as follows:

verruca vulgaris verruca planaverruca acuminatamolluscum contagiosumhemangioma simplex cavernous hemangiomanevus flammeussimple lymphomacavernous lymphangioma

10.  amelanotic nevus

11.  pigmented nevus

12.  verrucoid nevus

13.  linear verrucous nevus

14.  sebaceous nevus

15.  keloid

16.  seborrheic keratosis

17.  granuloma pyogenicum

18.  neurodermatitis

19.  chronic eczema

20.  lichen planus

21.  prurigo nodularis

22.  skin tag

23.  Face yellow warts

24.  granuloma annulare

25.  discoid lupus erythematosus

26.  acne rosacea

27.  porokeratosis of Mibelli

28.  papillary dermatitis

29.  keratoacanthoma

30.  dermatofibroma

31.  neurofibromatosis

32.  lupus

33.  leukoderma acquisitum centrifugum

34.  lichen spinulosus

35.  trichoepithelioma

36.  chloasma.

37.  seborrheic dermatitis

38.  atopic dermatitis

39.  tylosis

40.  clavus

41.   black nevus

42.  pigmented nevus

43.  eye crumbs

44.  folliculitis

45.  amyloidosis cutis

46.  spider angioma

47.  brothers tinea

48.  posttraumatic blackspot

49.  keratoma palmare et plantare

50.  Insect shape skin atrophy

51.  psoriasis

52.  pigmentation

53.  benign bluenevus

54.  Nevus of Ito

55.  verruca filiformis

56.  multiple neurofibromatosis

57.  psoriasis vulgaris

58.  knuckle pads

59.  corporis diffusum

60.  freckle

Precancerous lesion:

senile keratosiscutaneous hornalphelasmaarsenical keratosisxeroderma pigmentosum

As the pathological changes mentioned above,it is better to cure using freezing method.

Four:Planet Explanation

cold head knoboff-gas pipecontrol valvereceiverhandle

Five:Structure Features

Receiver:It uses slender thermos flask which is of 250mm height.Its shell is made of bilayer stainless steel. Take vacuum polarization treatment.Cold gun:Barell, perfusion tube and outlet pipe are all made of small diameter ,thin-walled ,seamless stainless steel pipe.Cold head:It is made of pure copper which is high thermal conductivity.Plate silver on the surface.Handle:It is made of refined organic glass material.Equipment box:The shell is made of leather and the box is made of wood.Box-locker and handle are elegant appearance.The box is convenience in use.

DZ4 low temperature treatment instrument has the following features:

10.Receiver’s Clean and Dry:During the use of  liquid nitrogen receiver, thermos flask saves water and reproducts bacterial slowly. These mixes with liquid nitrogen.It had better clean 2 or 3 times per month.Method is as follows:

(1)when the temperature of thermos flask reaches 0 degree,inject water of 40-50 degree and clean with rag.

(2)Rinse with clean water.

(3)Invert receiver and dry.You can dry the moisture in the open air or using warm air.If  using warm air,the temperature should be under 60 degree,between 40-50 degree.

Eight:Notice

Liquid nitrogen is a superlow temperature liquid so it can damage skins and produces prostbite.When you intject liquid-gas into receiver,put on gloves.Naked foot or wearing slippers are forbidded in case liquid gas damages people when spraying.Although liquid nitrogen is no-courlor,no odourless and no-poisonous,be care of indoor airfolw to keep air fresh.

NINE:List Details For Attachment

Terapy apparatus:one

Cold head:nine

Products Introduction:one

Warranty card:one

freeze therapy unit